Conventional electronic devices with bulky and rigid features cannot fully meet the requirements of fexibility and wearability in wearable applications.Fiber-shaped electronic devices have been intensively pursued in ...Conventional electronic devices with bulky and rigid features cannot fully meet the requirements of fexibility and wearability in wearable applications.Fiber-shaped electronic devices have been intensively pursued in the past decade attributed to their excellent fexibility,weavability and wearability.The innovation of novel functions has been widely recognized as an emerging direction of fber-shaped electronic devices,pursuing a better adaptability and longer lifetime in practical applications.In this Review,we summarize the recent advances of functional fber devices,focusing on the preparation of functional fber electrodes and electrolytes,as well as the formed interfaces.Fiber devices with a variety of novel functions are systematically introduced,including but not limited to stretchability,healability,shape memory and electrochromism.The remaining challenges and opportunities are also discussed to propose future directions for functionalization of fber electronics.展开更多
Crystal optics and fiber grating technology are two of the most important optical fiber device technologies. In this paper, we report several new devices developed in Accelink for WDM networks application.
Liquid crystal photonic bandgap （LCPBG） fibers provide a versatile and robust platform for designing optical fiber devices, which are highly tunable and exhibit novel optical properties for manipulation of guided li...Liquid crystal photonic bandgap （LCPBG） fibers provide a versatile and robust platform for designing optical fiber devices, which are highly tunable and exhibit novel optical properties for manipulation of guided light. We review the research progress on design, fabrication and development of integrated LCPBG fiber devices.展开更多
An all optical all fiber optical bistability operation has been realized in an all fiber cavity consisted with Er doped fiber and optical fiber loop mirrors. The experimental bistability threshold is consistent w...An all optical all fiber optical bistability operation has been realized in an all fiber cavity consisted with Er doped fiber and optical fiber loop mirrors. The experimental bistability threshold is consistent with the theory.展开更多
A hybrid fiber optical bistable device with electrical feedback has been proposed and analyzed.Bistability operation and some applications for optical signal processing have been realized experimentally .
With the gradual maturity of the microfluidic technology,the integration of the microfluidic chip technology and optofluidic methods in microstructured optical fibers(MOFs)has gradually formed a highly attractive new ...With the gradual maturity of the microfluidic technology,the integration of the microfluidic chip technology and optofluidic methods in microstructured optical fibers(MOFs)has gradually formed a highly attractive new research direction.In this paper,we summarize our recent work focusing on the microfluidic sensing technology based on microhole fibers.The design and fabrication of such microfluidic fibers,device processing and fabrication techniques based on microfluidic fibers,and surface modification and coating methods for fibers are systematically introduced.Finally,several typical cases combining the optical fiber and microfluidic substance detection are presented.展开更多
Fiber-based electronic devices(FEDs)exhibit high flexibility,low weight,and excellent integrability into wearable,implantable,and robotic systems.Recent advances have enabled applications in sensing,energy harvesting,...Fiber-based electronic devices(FEDs)exhibit high flexibility,low weight,and excellent integrability into wearable,implantable,and robotic systems.Recent advances have enabled applications in sensing,energy harvesting,and storage,and active functions.Despite this progress,challenges such as mechanical fatigue,interfacial delamination,and signal instability remain.This review offers key challenges and perspectives on the future of FEDs as interactive,autonomous platforms for nextgeneration electronics in healthcare,robotics,and beyond.展开更多
Lightweight and flexible fiber devices are currently attracting significant interest in the field of advanced wearable electron-ics.However,many electroluminescent fiber devices suffer from high operating voltage and ...Lightweight and flexible fiber devices are currently attracting significant interest in the field of advanced wearable electron-ics.However,many electroluminescent fiber devices suffer from high operating voltage and power consumption.To address this issue,a novel low-power-consumption coaxial electrophoretic display fiber(EPDF)with low-power-consumption,which consists of silver nanowire electrodes,electrophoretic microcapsule layer,polydimethylsiloxane(PDMS)encapsulation layer and PDMS substrate,was fabricated using a simple dip-coating method.The prepared fiber devices exhibit full functionality under a human-safe voltage of 30 V,featuring uniform and angle-independent contrast.Moreover,the EPDFs demonstrate excellent flexibility and mechanical stability,capable of operating properly at axial strains exceeding 50%and maintaining performance after 1000 cycles of 30%strain.The EPDFs,encapsulated with transparent PDMS,demonstrating exceptional wearability and biocompatibility.Benefiting from the distinctive bistable characteristics of electrophoretic microcapsule particles,EPDFs exhibit ultralow power consumption,and the varying light absorption capacities in different display states empower them to adapt effectively to diverse environments.These remarkable features qualify EPDFs for various outdoor wearable applications.Finally,a proof-of-concept of electrophoretic display fabric is demonstrated by weaving the as-pre-pared fiber with common yarn,showcasing the future perspective of wearable functional textiles entirely woven from EPD.展开更多
Characteristics of electric field from a coupled mode inside an optical fiber under perturbation by three-dimensional(3D)printed long-period fiber grating(LPFG)device have been observed in this work by the experiment ...Characteristics of electric field from a coupled mode inside an optical fiber under perturbation by three-dimensional(3D)printed long-period fiber grating(LPFG)device have been observed in this work by the experiment and simulation.The various periodic index differences referring to the weights of perturbation by 3D printed LPFG device are applied on the single-mode fiber.The experimental results show that the resonant wavelength shift is a linear function of the grating period with the maximum coefficient of determination R2 of 0.9995.Some of resonant wavelengths are chosen to run simulations to investigate the electric field distribution.The scattering direction of the electric field states the magnitude of leaking optical power when the light transmits through the grating region applied to the single-mode fiber.Both the experimental and simulation results demonstrate that our proposed scheme can usefully be applied to selective tunable filters,intruder sensors,etc.展开更多
Two-dimensional（2D） materials have emerged as attractive mediums for fabricating versatile optoelectronic devices. Recently, few-layer molybdenum disulfide（MoS2）, as a shining 2D material, has been discovered to p...Two-dimensional（2D） materials have emerged as attractive mediums for fabricating versatile optoelectronic devices. Recently, few-layer molybdenum disulfide（MoS2）, as a shining 2D material, has been discovered to possess both the saturable absorption effect and large nonlinear refractive index. Herein, taking advantage of the unique nonlinear optical properties of MoS2, we fabricated a highly nonlinear saturable absorption photonic device by depositing the few-layer MoS2 onto the microfiber. With the proposed MoS2 photonic device, apart from the conventional soliton patterns, the mode-locked pulses could be shaped into some new soliton patterns, namely,multiple soliton molecules, localized chaotic multipulses, and double-scale soliton clusters. Our findings indicate that the few-layer MoS2-deposited microfiber could operate as a promising highlynonlinear photonic device for the related nonlinear optics applications.展开更多
Panvascular diseases,sharing atherosclerosis as a common pathological basis,pose a significant threat to human health.Flexible fibers combined with sensing elements become implantable and interventional smart fibers w...Panvascular diseases,sharing atherosclerosis as a common pathological basis,pose a significant threat to human health.Flexible fibers combined with sensing elements become implantable and interventional smart fibers with monitoring and intervention capabilities.Due to the prolonged course of panvascular diseases,higher requirements are imposed on the monitoring-intervention closed-loop system of flexible fibers—high suitcordance(a combination of short-term suitability and long-term concordance).Suitcordance implies that novel flexible fibers must meet the traditional concept of compatibility and satisfy the new requirement of long-term co-regulation of fiber-vascular fate.This review introduces emerging flexible fiber electronic devices with exceptional performance related to panvascular diseases.These devices adapt well to the complex panvascular environment and provide ideal technical support for real-time,non-invasive,and continuous health monitoring-treatment.However,existing devices have limitations,and future research should focus on developing novel flexible smart fibers based on the clinical needs of panvascular diseases.展开更多
Ultrafast lasers generating high-repetition-rate ultrashort pulses through various mode-locking methods can benefit many important applications,including communications,materials processing,astronomical observation,et...Ultrafast lasers generating high-repetition-rate ultrashort pulses through various mode-locking methods can benefit many important applications,including communications,materials processing,astronomical observation,etc.For decades,mode-locking based on dissipative four-wave-mixing(DFWM)has been fundamental in producing pulses with repetition rates on the order of gigahertz(GHz),where multiwavelength comb filters and long nonlinear components are elemental.Recently,this method has been improved using filter-driven DFWM,which exploits both the filtering and nonlinear features of silica microring resonators.However,the fabrication complexity and coupling loss between waveguides and fibers are problematic.We demonstrate a tens-to hundreds-of gigahertz-stable pulsed all-fiber laser based on a hybrid plasmonic microfiber knot resonator device.Unlike previously reported pulse generation mechanisms,the operation utilizes the nonlinear-polarization-rotation(NPR)effect introduced by the polarization-dependent feature of the device to increase intracavity power for boosting DFWM mode-locking,which we term NPRstimulated DFWM.The easily fabricated versatile device acts as a polarizer,comb filter,and nonlinear component simultaneously,thereby introducing an application of microfiber resonator devices in ultrafast and nonlinear photonics.We believe that our work underpins a significant improvement in achieving practical low-cost ultrafast light sources.展开更多
Wearable gas sensors that are lightweight, portable, and inexpensive have great potential application in the real-time detection of human health and environmental monitoring. In this work, we fabricated flexible fiber...Wearable gas sensors that are lightweight, portable, and inexpensive have great potential application in the real-time detection of human health and environmental monitoring. In this work, we fabricated flexible fiber gas sensors with single-walled carbon nanotube （SWCNT）, multi-walled carbon nanotube （MWCNT）, and ZnO quantum dot-decorated SWCNT （SWCNTs@ZnO） sensing elements. These flexible fiber gas sensors could be operated at room temperature to detect target gases with good sensitivity and recovery time. They also exhibited superior long-term stability, as well as good device mechanical bending ability and robustness. Integrating these flexible gas sensors into face masks, the fabricated wearable smart face masks could be used to selectively detect CaHsOH, HCHO, and NH3 by reading the corresponding LEDs with different colors. Such face masks have great potential application in the Internet of Things and wearable electronics.展开更多
A novel harmonic mode-locked fiber laser based on nonlinear multimode interference(NL-MMI) in a microfiber-assisted ultrafast optical switch is proposed in this Letter.The microfiber-assisted ultrafast optical switch ...A novel harmonic mode-locked fiber laser based on nonlinear multimode interference(NL-MMI) in a microfiber-assisted ultrafast optical switch is proposed in this Letter.The microfiber-assisted ultrafast optical switch can be obtained by tapering the splicing point of the graded-index multimode fiber(GIMF) and single-mode fiber,which not only helps to shorten the self-imaging period in GIMF to relax the strict requirement of NL-MMI on the length of multimode fiber,but also improves the harmonic order.In the experiment,with the waist diameter of ~15 μm,the repetition rates of the fiber laser can be stably locked at 285 MHz,corresponding to the 16 th-order harmonic mode-locking,with the pulse duration of 1.52 ps.Our results provide novel insight into the design of a high-repetition-rate laser and the application of microfibers in the modelocking device.展开更多
The ＂lab-on-fiber＂ concept envisions novel and highly functionalized technological platforms completely integrated in a single optical fiber that would allow the development of advanced devices, components and sub-s...The ＂lab-on-fiber＂ concept envisions novel and highly functionalized technological platforms completely integrated in a single optical fiber that would allow the development of advanced devices, components and sub-systems to be incorporated in modem optical systems for communication and sensing applications. The realization of integrated optical fiber devices requires that several structures and materials at nano- and micro-scale are constructed, embedded and connected all together to provide the necessary physical connections and light-matter interactions. This paper reviews the strategies, the main achievements and related devices in the lab-on-fiber roadmap discussing perspectives and challenges that lie ahead.展开更多
An advance in the integration of high-performing semiconductors into fibers enables innovative fiber devices and fabric systems that sense,communicate and interact,paving the way for unprecedented applications in wear...An advance in the integration of high-performing semiconductors into fibers enables innovative fiber devices and fabric systems that sense,communicate and interact,paving the way for unprecedented applications in wearable technology,fabric computation,and ambient intelligence.展开更多
Electrochemical therapy emerged as a low-cost and efective method for tumor ablation.However,it has challenges such as the production of toxic byproducts and the use of rigid electrodes that damage soft tissues.Here,w...Electrochemical therapy emerged as a low-cost and efective method for tumor ablation.However,it has challenges such as the production of toxic byproducts and the use of rigid electrodes that damage soft tissues.Here,we report a new injectable and tissue-compatible fber therapeutic electronics for safe and efcient tumor treatment.The design of aligned carbon nanotube(CNT)fber as electrodes endowed the device with high softness and enabled mini-invasive implantation through injection.Under a mild voltage(1.2 V),the fber device released hydroxyl ions to alter the local chemical environment of the tissues without additional toxic products/gases,leading to immediate death of tumor cells.The fexible fber device could form stable interface with tissues and showed good biocompatibility after implantation for 30 days.The in vitro experimental results showed the fber device could efciently kill 90.9%of QGY-7703 cancer cells after a single treatment in a few minutes.The tumor-bearing animal models proved that the fber therapeutic device could efectively inhibit the growth of tumor tissues,indicating it is a safe,efective,controllable and low-cost method for tumor therapy.展开更多
A multi-direction bending sensor based on spot pattern demodulation of a dual-hole fiber(DHF)is proposed.By using the interference and scattering in a DHF,the related multidirectional variations can be captured by the...A multi-direction bending sensor based on spot pattern demodulation of a dual-hole fiber(DHF)is proposed.By using the interference and scattering in a DHF,the related multidirectional variations can be captured by the optical field.Furthermore,the multi-directional bending characteristics of the fiber are quantitatively described by the pattern of the output light spot,achieving multidirectional bending sensing.In addition,considering the subtle changes in the deformation patterns over time,a convolutional neural network(CNN)model based on deep learning is introduced for accurate recognition and prediction of the bending angle.The experimental results show that the sensor can perceive different bending angles in four directions.These outstanding results indicate that the multi-directional bending sensor based on dual-hole interference pattern decoding has potential applications in multi-directional quantitative sensing and artificial intelligence perception.展开更多
Utilizing polarization maintaining photonic crystal fiber(PM-PCF)with the low temperature coefficient of birefringence,a two-dimensional tunable and temperature-insensitive Lyot filter aiming to compensate the frequen...Utilizing polarization maintaining photonic crystal fiber(PM-PCF)with the low temperature coefficient of birefringence,a two-dimensional tunable and temperature-insensitive Lyot filter aiming to compensate the frequency modulation to amplitude modulation(FM-to-AM)conversion in high power laser facility is demonstrated.The Jones matrix is applied to analyze the relationship between optical characteristics of the filter and physical parameters(including amplitude ratio,phase delay,and susceptibility of the birefringence to temperature)of the polarization optical field.Both the transmission peak wavelength and extinction ratio of the spectral transmission are able to be changed simultaneously,hence,it shows more efficient FM-to-AM compensation ability.Besides,the transmission peak shift is about 18pm/°C with the PM-PCF configuration,which is about two orders of magnitude less than the normal polarization maintaining fiber(PMF)configuration.The demonstrated filter presents a practical application potential in large scale laser driven facility.展开更多
In this paper, we propose an additional noise-free, independent center frequency and bandwidth tunable optical filter based on stimulated Brillouin scattering(SBS) losses. By suppressing the out-of-band signal with tw...In this paper, we propose an additional noise-free, independent center frequency and bandwidth tunable optical filter based on stimulated Brillouin scattering(SBS) losses. By suppressing the out-of-band signal with two broadened symmetric SBS losses, tunable pass bandwidths from 500 MHz to 9.5 GHz and the independent center frequency tunability are demonstrated. Considering the limited SBS interaction in the center frequency range,a flat-top response with minimum 0.3 dB ripple is achieved. Assisted by the extra suppression from polarization pulling, a maximum selectivity of 20 dB and an ultrahigh 250 dB∕GHz roll-off are reached. A gain-based SBS filter adds noise to the filtered signal. However, for our proposed filter setup, no additional noise is detected due to the transparency in the passband. Considering the wide independent bandwidth and center frequency tunability, flat-top response, and low-noise characteristic, our proposed filter can be perfectly used as a supplement of most commercialized conventional tunable optical single bandpass filters, whose minimum bandwidth is limited by 10 GHz.展开更多
文摘Conventional electronic devices with bulky and rigid features cannot fully meet the requirements of fexibility and wearability in wearable applications.Fiber-shaped electronic devices have been intensively pursued in the past decade attributed to their excellent fexibility,weavability and wearability.The innovation of novel functions has been widely recognized as an emerging direction of fber-shaped electronic devices,pursuing a better adaptability and longer lifetime in practical applications.In this Review,we summarize the recent advances of functional fber devices,focusing on the preparation of functional fber electrodes and electrolytes,as well as the formed interfaces.Fiber devices with a variety of novel functions are systematically introduced,including but not limited to stretchability,healability,shape memory and electrochromism.The remaining challenges and opportunities are also discussed to propose future directions for functionalization of fber electronics.
文摘Crystal optics and fiber grating technology are two of the most important optical fiber device technologies. In this paper, we report several new devices developed in Accelink for WDM networks application.
文摘Liquid crystal photonic bandgap （LCPBG） fibers provide a versatile and robust platform for designing optical fiber devices, which are highly tunable and exhibit novel optical properties for manipulation of guided light. We review the research progress on design, fabrication and development of integrated LCPBG fiber devices.
文摘An all optical all fiber optical bistability operation has been realized in an all fiber cavity consisted with Er doped fiber and optical fiber loop mirrors. The experimental bistability threshold is consistent with the theory.
文摘A hybrid fiber optical bistable device with electrical feedback has been proposed and analyzed.Bistability operation and some applications for optical signal processing have been realized experimentally .
基金supported in part by the National Natural Science Foundation of China(Grant Nos.62305231 and U23A20373)the Natural Science Foundation of Top Talent of Shenzhen Technology University,China(Grant No.GDRC202317).
文摘With the gradual maturity of the microfluidic technology,the integration of the microfluidic chip technology and optofluidic methods in microstructured optical fibers(MOFs)has gradually formed a highly attractive new research direction.In this paper,we summarize our recent work focusing on the microfluidic sensing technology based on microhole fibers.The design and fabrication of such microfluidic fibers,device processing and fabrication techniques based on microfluidic fibers,and surface modification and coating methods for fibers are systematically introduced.Finally,several typical cases combining the optical fiber and microfluidic substance detection are presented.
基金supported by the DGIST R&D Program of the Ministry of Science and ICT(2025010373,25-IRJoint-06)supported by the National Research Foundation of Korea(NRF)grant funded by the Korea government(MSIT)(No.NRF-2021R1C1C1009271)+1 种基金by the Korea Medical Device Development Fund grant funded by the Korea government(the Ministry of Science and ICT,the Ministry of Trade,Industry and Energy,the Ministry of Health&Welfare,the Ministry of Food and Drug Safety)(Project Number:2710002210,RS-2023-00243310)supported by the Industrial Fundamental Technology Development Program(20018274,Development of gripper system for various production processes and multi-modal flexible tactile sensor system)funded by the Ministry of Trade,Industry&Energy(MOTIE)of Korea.
文摘Fiber-based electronic devices(FEDs)exhibit high flexibility,low weight,and excellent integrability into wearable,implantable,and robotic systems.Recent advances have enabled applications in sensing,energy harvesting,and storage,and active functions.Despite this progress,challenges such as mechanical fatigue,interfacial delamination,and signal instability remain.This review offers key challenges and perspectives on the future of FEDs as interactive,autonomous platforms for nextgeneration electronics in healthcare,robotics,and beyond.
基金supported by MOST(2022YFA1203003).The funder played no role in the study design,data collection,analysis,and interpretation of data,or the writing of this manuscript.
文摘Lightweight and flexible fiber devices are currently attracting significant interest in the field of advanced wearable electron-ics.However,many electroluminescent fiber devices suffer from high operating voltage and power consumption.To address this issue,a novel low-power-consumption coaxial electrophoretic display fiber(EPDF)with low-power-consumption,which consists of silver nanowire electrodes,electrophoretic microcapsule layer,polydimethylsiloxane(PDMS)encapsulation layer and PDMS substrate,was fabricated using a simple dip-coating method.The prepared fiber devices exhibit full functionality under a human-safe voltage of 30 V,featuring uniform and angle-independent contrast.Moreover,the EPDFs demonstrate excellent flexibility and mechanical stability,capable of operating properly at axial strains exceeding 50%and maintaining performance after 1000 cycles of 30%strain.The EPDFs,encapsulated with transparent PDMS,demonstrating exceptional wearability and biocompatibility.Benefiting from the distinctive bistable characteristics of electrophoretic microcapsule particles,EPDFs exhibit ultralow power consumption,and the varying light absorption capacities in different display states empower them to adapt effectively to diverse environments.These remarkable features qualify EPDFs for various outdoor wearable applications.Finally,a proof-of-concept of electrophoretic display fabric is demonstrated by weaving the as-pre-pared fiber with common yarn,showcasing the future perspective of wearable functional textiles entirely woven from EPD.
文摘Characteristics of electric field from a coupled mode inside an optical fiber under perturbation by three-dimensional(3D)printed long-period fiber grating(LPFG)device have been observed in this work by the experiment and simulation.The various periodic index differences referring to the weights of perturbation by 3D printed LPFG device are applied on the single-mode fiber.The experimental results show that the resonant wavelength shift is a linear function of the grating period with the maximum coefficient of determination R2 of 0.9995.Some of resonant wavelengths are chosen to run simulations to investigate the electric field distribution.The scattering direction of the electric field states the magnitude of leaking optical power when the light transmits through the grating region applied to the single-mode fiber.Both the experimental and simulation results demonstrate that our proposed scheme can usefully be applied to selective tunable filters,intruder sensors,etc.
基金supported in part by the National Natural Science Foundation of China (Grant Nos. 11474108, 61378036, 61307058, 11304101, 11074078)the PhD Start-up Fund of Natural Science Foundation of Guangdong Province, China (Grant No. S2013040016320)+2 种基金the Scientific and Technological Innovation Project of Higher Education Institute, Guangdong, China (Grant No. 2013KJCX0051)the financial support from the Guangdong Natural Science Funds for Distinguished Young Scholarthe Zhujiang New-star Plan of Science & Technology in Guangzhou City (Grant No. 2014J2200008)
文摘Two-dimensional（2D） materials have emerged as attractive mediums for fabricating versatile optoelectronic devices. Recently, few-layer molybdenum disulfide（MoS2）, as a shining 2D material, has been discovered to possess both the saturable absorption effect and large nonlinear refractive index. Herein, taking advantage of the unique nonlinear optical properties of MoS2, we fabricated a highly nonlinear saturable absorption photonic device by depositing the few-layer MoS2 onto the microfiber. With the proposed MoS2 photonic device, apart from the conventional soliton patterns, the mode-locked pulses could be shaped into some new soliton patterns, namely,multiple soliton molecules, localized chaotic multipulses, and double-scale soliton clusters. Our findings indicate that the few-layer MoS2-deposited microfiber could operate as a promising highlynonlinear photonic device for the related nonlinear optics applications.
基金supported by the National Natural Science Foundation of China(T2288101,82170342)Medical Engineering Joint Fund of Fudan University(yg2023-01).
文摘Panvascular diseases,sharing atherosclerosis as a common pathological basis,pose a significant threat to human health.Flexible fibers combined with sensing elements become implantable and interventional smart fibers with monitoring and intervention capabilities.Due to the prolonged course of panvascular diseases,higher requirements are imposed on the monitoring-intervention closed-loop system of flexible fibers—high suitcordance(a combination of short-term suitability and long-term concordance).Suitcordance implies that novel flexible fibers must meet the traditional concept of compatibility and satisfy the new requirement of long-term co-regulation of fiber-vascular fate.This review introduces emerging flexible fiber electronic devices with exceptional performance related to panvascular diseases.These devices adapt well to the complex panvascular environment and provide ideal technical support for real-time,non-invasive,and continuous health monitoring-treatment.However,existing devices have limitations,and future research should focus on developing novel flexible smart fibers based on the clinical needs of panvascular diseases.
基金sponsored by the National Natural Science Foundation of China(Grant Nos.61925502,61535005,and 61975107)the National Key R&D Program of China(Grant Nos.2017YFA0303700 and 2017YFA0700503).
文摘Ultrafast lasers generating high-repetition-rate ultrashort pulses through various mode-locking methods can benefit many important applications,including communications,materials processing,astronomical observation,etc.For decades,mode-locking based on dissipative four-wave-mixing(DFWM)has been fundamental in producing pulses with repetition rates on the order of gigahertz(GHz),where multiwavelength comb filters and long nonlinear components are elemental.Recently,this method has been improved using filter-driven DFWM,which exploits both the filtering and nonlinear features of silica microring resonators.However,the fabrication complexity and coupling loss between waveguides and fibers are problematic.We demonstrate a tens-to hundreds-of gigahertz-stable pulsed all-fiber laser based on a hybrid plasmonic microfiber knot resonator device.Unlike previously reported pulse generation mechanisms,the operation utilizes the nonlinear-polarization-rotation(NPR)effect introduced by the polarization-dependent feature of the device to increase intracavity power for boosting DFWM mode-locking,which we term NPRstimulated DFWM.The easily fabricated versatile device acts as a polarizer,comb filter,and nonlinear component simultaneously,thereby introducing an application of microfiber resonator devices in ultrafast and nonlinear photonics.We believe that our work underpins a significant improvement in achieving practical low-cost ultrafast light sources.
文摘Wearable gas sensors that are lightweight, portable, and inexpensive have great potential application in the real-time detection of human health and environmental monitoring. In this work, we fabricated flexible fiber gas sensors with single-walled carbon nanotube （SWCNT）, multi-walled carbon nanotube （MWCNT）, and ZnO quantum dot-decorated SWCNT （SWCNTs@ZnO） sensing elements. These flexible fiber gas sensors could be operated at room temperature to detect target gases with good sensitivity and recovery time. They also exhibited superior long-term stability, as well as good device mechanical bending ability and robustness. Integrating these flexible gas sensors into face masks, the fabricated wearable smart face masks could be used to selectively detect CaHsOH, HCHO, and NH3 by reading the corresponding LEDs with different colors. Such face masks have great potential application in the Internet of Things and wearable electronics.
基金supported by the National Natural Science Foundation of China (NSFC) (Nos. 61805023, 61804013, and 61804014)
文摘A novel harmonic mode-locked fiber laser based on nonlinear multimode interference(NL-MMI) in a microfiber-assisted ultrafast optical switch is proposed in this Letter.The microfiber-assisted ultrafast optical switch can be obtained by tapering the splicing point of the graded-index multimode fiber(GIMF) and single-mode fiber,which not only helps to shorten the self-imaging period in GIMF to relax the strict requirement of NL-MMI on the length of multimode fiber,but also improves the harmonic order.In the experiment,with the waist diameter of ~15 μm,the repetition rates of the fiber laser can be stably locked at 285 MHz,corresponding to the 16 th-order harmonic mode-locking,with the pulse duration of 1.52 ps.Our results provide novel insight into the design of a high-repetition-rate laser and the application of microfibers in the modelocking device.
文摘The ＂lab-on-fiber＂ concept envisions novel and highly functionalized technological platforms completely integrated in a single optical fiber that would allow the development of advanced devices, components and sub-systems to be incorporated in modem optical systems for communication and sensing applications. The realization of integrated optical fiber devices requires that several structures and materials at nano- and micro-scale are constructed, embedded and connected all together to provide the necessary physical connections and light-matter interactions. This paper reviews the strategies, the main achievements and related devices in the lab-on-fiber roadmap discussing perspectives and challenges that lie ahead.
基金support National Natural Science Foundation of China(Grant No.52202167)the Science and Technology Commission of Shanghai Municipality(Grant No.20JC1414900)+1 种基金the National Natural Science Foundation of China(Grant No.52127805)the National Key Research and Development Program of China(Grant No.2021YFA1201300).
文摘An advance in the integration of high-performing semiconductors into fibers enables innovative fiber devices and fabric systems that sense,communicate and interact,paving the way for unprecedented applications in wearable technology,fabric computation,and ambient intelligence.
基金This work was supported by MOST(2016YFA0203302),NSFC(21634003,22075050),STCSM(20JC1414902),SHMEC(2017-01-07-00-07-E00062)the National Postdoctoral Program for Innovative Talents(BX2021245)the Fundamental Research Funds for the Central Universities.
文摘Electrochemical therapy emerged as a low-cost and efective method for tumor ablation.However,it has challenges such as the production of toxic byproducts and the use of rigid electrodes that damage soft tissues.Here,we report a new injectable and tissue-compatible fber therapeutic electronics for safe and efcient tumor treatment.The design of aligned carbon nanotube(CNT)fber as electrodes endowed the device with high softness and enabled mini-invasive implantation through injection.Under a mild voltage(1.2 V),the fber device released hydroxyl ions to alter the local chemical environment of the tissues without additional toxic products/gases,leading to immediate death of tumor cells.The fexible fber device could form stable interface with tissues and showed good biocompatibility after implantation for 30 days.The in vitro experimental results showed the fber device could efciently kill 90.9%of QGY-7703 cancer cells after a single treatment in a few minutes.The tumor-bearing animal models proved that the fber therapeutic device could efectively inhibit the growth of tumor tissues,indicating it is a safe,efective,controllable and low-cost method for tumor therapy.
基金supported by the Basic and Applied Basic Research Foundation of Guangdong Province(No.2022A1515110480)the National Natural Science Foundation of China(No.62205057)the Dongguan Science and Technology of Social Development Program(No.20231800903222).
文摘A multi-direction bending sensor based on spot pattern demodulation of a dual-hole fiber(DHF)is proposed.By using the interference and scattering in a DHF,the related multidirectional variations can be captured by the optical field.Furthermore,the multi-directional bending characteristics of the fiber are quantitatively described by the pattern of the output light spot,achieving multidirectional bending sensing.In addition,considering the subtle changes in the deformation patterns over time,a convolutional neural network(CNN)model based on deep learning is introduced for accurate recognition and prediction of the bending angle.The experimental results show that the sensor can perceive different bending angles in four directions.These outstanding results indicate that the multi-directional bending sensor based on dual-hole interference pattern decoding has potential applications in multi-directional quantitative sensing and artificial intelligence perception.
基金This work was supported by the Science and Technology Major Project of Guangxi(Grant No.AA18118032)Laser Fusion Research Center Funds for Young Talents(Grant No.RCFCZ3-2019-7).
文摘Utilizing polarization maintaining photonic crystal fiber(PM-PCF)with the low temperature coefficient of birefringence,a two-dimensional tunable and temperature-insensitive Lyot filter aiming to compensate the frequency modulation to amplitude modulation(FM-to-AM)conversion in high power laser facility is demonstrated.The Jones matrix is applied to analyze the relationship between optical characteristics of the filter and physical parameters(including amplitude ratio,phase delay,and susceptibility of the birefringence to temperature)of the polarization optical field.Both the transmission peak wavelength and extinction ratio of the spectral transmission are able to be changed simultaneously,hence,it shows more efficient FM-to-AM compensation ability.Besides,the transmission peak shift is about 18pm/°C with the PM-PCF configuration,which is about two orders of magnitude less than the normal polarization maintaining fiber(PMF)configuration.The demonstrated filter presents a practical application potential in large scale laser driven facility.
文摘In this paper, we propose an additional noise-free, independent center frequency and bandwidth tunable optical filter based on stimulated Brillouin scattering(SBS) losses. By suppressing the out-of-band signal with two broadened symmetric SBS losses, tunable pass bandwidths from 500 MHz to 9.5 GHz and the independent center frequency tunability are demonstrated. Considering the limited SBS interaction in the center frequency range,a flat-top response with minimum 0.3 dB ripple is achieved. Assisted by the extra suppression from polarization pulling, a maximum selectivity of 20 dB and an ultrahigh 250 dB∕GHz roll-off are reached. A gain-based SBS filter adds noise to the filtered signal. However, for our proposed filter setup, no additional noise is detected due to the transparency in the passband. Considering the wide independent bandwidth and center frequency tunability, flat-top response, and low-noise characteristic, our proposed filter can be perfectly used as a supplement of most commercialized conventional tunable optical single bandpass filters, whose minimum bandwidth is limited by 10 GHz.
