Dear Editor,It is now well established that optogenetic stimulation can achieve precise intervention and modulate the activity of local neurons or neural circuits in the brain.Although this technique holds promise for...Dear Editor,It is now well established that optogenetic stimulation can achieve precise intervention and modulate the activity of local neurons or neural circuits in the brain.Although this technique holds promise for clinical therapy for neurological and psychiatric disorders,it requires the expression of lightsensitive proteins(such as channel rhodopsin)or photoactivatable chemicals(such as caged neurotransmitters)in the targeted brain regions[1].展开更多
ZrCo alloy holds great promise for hydrogen isotope storage,yet its susceptibility to poisoning by impurity gases,especially CO,poses a challenge.This susceptibility arises due to the electron acceptor nature of the s...ZrCo alloy holds great promise for hydrogen isotope storage,yet its susceptibility to poisoning by impurity gases,especially CO,poses a challenge.This susceptibility arises due to the electron acceptor nature of the surface Co element and the formation of the d-πfeedback bond,thereby impeding the surface hydrogen dissociation.Accordingly,we propose a novel local activity modulation strategy,where substituent elements are sacrificed to protect the active Co sites for hydrogen dissociation.Considering CO absorption capacity,solid solubility,and hydrogen affinity,we selected V,Cr,and Mn as microalloying elements and successfully prepared the single-phase ZrCo_(0.97)(VCrMn)_(0.03)alloy.Compared to pristine ZrCo,ZrCo_(0.97)(VCrMn)_(0.03)demonstrates significantly enhanced poisoning resistance.Notably,the hydrogenation kinetics of ZrCo_(0.97)(VCrMn)_(0.03)is 2.4 times higher than that of ZrCo in 4 bar H_(2)+5000 ppm CO.Interestingly,the controllable in situ formation of the Co_(2)C phase shell structure during cycling further safeguards the surface reactivity of ZrCo_(0.97)(VCrMn)_(0.03).Consequently,its capacity retention ratio after 25 cycles has been improved to 74.5%from 55.3%of the ZrCo alloy.These findings suggest that micro-alloying engineering could be a promising strategy for surface activity modulation to enhance the anti-poisoning properties of hydrogen storage materials.展开更多
Fe-based catalysts are widely used for CO_(2)hydrogenation to light olefins(C_(2–4)=);however,precise regulation of active phases and the balance between intermediate reactions remain significant challenges.Herein,we...Fe-based catalysts are widely used for CO_(2)hydrogenation to light olefins(C_(2–4)=);however,precise regulation of active phases and the balance between intermediate reactions remain significant challenges.Herein,we find that the addition of moderate amounts of Ti forms a strong interaction with Fe compositions,modulating the Fe_(3)O_(4)and Fe_(5)C_(2)contents.Enhanced interaction leads to an increased Fe_(5)C_(2)/Fe_(3)O_(4)ratio,which in turn enhances the adsorption of reactants and intermediates,promoting CO hydrogenation to unsaturated alkyl groups and facilitating C–C coupling.Furthermore,the strong Fe-Ti interaction induces the preferential growth of Fe_(5)C_(2)into prismatic structures that expose the(020),(–112),and(311)facets,forming compact active interfacial sites with Fe_(3)O_(4)nanoparticles.These facet and interfacial effects significantly promote the synergistic coupling of the reverse water gas shift and Fischer-Tropsch reactions.The optimized 3K/FeTi catalyst with the highest Fe_(5)C_(2)/Fe_(3)O_(4)ratio of 3.6 achieves a 52.2%CO_(2)conversion rate,with 44.5%selectivity for C2–4=and 9.5%for CO,and the highest space-time yield of 412.0 mg gcat^(–1)h^(–1)for C_(2–4)=.展开更多
Layered double hydroxides(LDHs)are promising electrode candidates for supercapacitors.However,lim-itations like inferior cycling stability and unsatisfactory charge storage capability at low temperatures have exerted ...Layered double hydroxides(LDHs)are promising electrode candidates for supercapacitors.However,lim-itations like inferior cycling stability and unsatisfactory charge storage capability at low temperatures have exerted negative effects on their applications.Herein,a novel synthetic process has been elaborately designed and provided to have the composition and structure of the C/N-NiCoMn-LDH/Ag(C/N-CNMA)delicately regulated.Both the experimental and theoretical researches unveil that the incorporated manganese species and elemental silver could dramatically modulate the bandgap,crystallinity and surface electron structure of the LDH,leading to the remarkable improvement in its conductivity,exposed active sites and intrinsic electrochemical activity,and thus the OH^(*)and O^(*)adsorption free energy could be remarkably optimized,even at low temperatures.In addition,the low crystallinity C/N-CNMA is of great electrochemical compatibility with both the KOH aqueous electrolyte and the isobutyl alcohol(IPA)modulated organohydrogel electrolyte.By means of adjusting the solvation and hydrogen bonding in the electrolytes,the assembled hybrid supercapacitors deliver excellent energy density,power density and cycling stability in the temperature range of-30 to 25℃.Specifically,the gel electrolyte with IPA as the anti-freezing functional additive displays high flexibility and ionic conductivity at low temperatures.展开更多
Oolong tea,partially fermented from Camellia sinensis leaves,exhibits significant antioxidative,anti-inflammatory,and anti-cancer activities as indicated in several in vitro and in vivo studies.However,studies on heal...Oolong tea,partially fermented from Camellia sinensis leaves,exhibits significant antioxidative,anti-inflammatory,and anti-cancer activities as indicated in several in vitro and in vivo studies.However,studies on health promoting effects of oolong tea and its characteristic compounds are limited.The potential efficacy of bioactives derived from oolong tea and their roles as promising anticancer agents,their cardio-protective benefits during hypoxic conditions,effects in treating allergic disorders,potential prebiotic activities,improvement of blood lipid status in human beings,effectivity as oral hypoglycemic agent in the treatment of type 2 diabetes,and their potentials to reduce the risk of obesity have been discussed in this review.These promising studies mainly gained from animal studies might broaden the consumption and usage of the phenolic-enriched oolong tea and its products in food and pharmaceutical industries.However,potential health beneficial effects of oolong tea in humans should be further complemented by large-sized,randomized double-blind and placebo-controlled trials to consolidate potential therapeutic applications.展开更多
Aqueous zinc ion batteries(AZIBs)are a promising energy storage technology due to their cost-effectiveness and safety.Organic materials with sustainable and designable structures are of great interest as AZIBs cath-od...Aqueous zinc ion batteries(AZIBs)are a promising energy storage technology due to their cost-effectiveness and safety.Organic materials with sustainable and designable structures are of great interest as AZIBs cath-odes.However,small molecules in organic cathode materials face dissolution problems and suboptimal cycle life,whereas large molecules suffer from a low theoretical capacity due to their inert carbon skeletons.Here,we designed two covalent organic framework(COF)materials(benzoquinoxaline benzoquinone-based COF(BB-COF)and triquinoxalinylene benzoquinone-based COF(TB-COF))with the same structure and number of energy storage groups to investigate the correlation between the densities of active sites and electrochemi-cal performance.We conclude that the electrochemical behavior of organic conjugate-based energy storage materials lacks a linear correlation with active site quantity.Adjusting active site densities is crucial for mate-rial advancement.BB-COF and TB-COF with dual active sites(C=O and C=N)exhibit distinct characteristics.TB-COF,which has dense active groups,shows a high initial capacity(222 mAh g^(-1)).Conversely,BB-COF,which features a large conjugated ring diameter,presents superior rate performance and enduring cycle stability.It even maintains stable cycling for 2000 cycles at-40℃.In-situ electrochemical quartz crystal mic-robalance tests reveal the energy storage mechanism of BB-COF,in which H+storage is followed by Zn2+storage.展开更多
Although many proteins have been found to exist as homooligomers in nature, the biological significance and mechanism for its occurring is far from clear. We have examined a variety
Formic acid is considered one of the most economically viable products for electrocatalytic CO_(2)reduction reaction(CO_(2)RR).However,developing highly active and selective electrocatalysts for effective CO_(2)conver...Formic acid is considered one of the most economically viable products for electrocatalytic CO_(2)reduction reaction(CO_(2)RR).However,developing highly active and selective electrocatalysts for effective CO_(2)conversion remains a grand challenge.Herein,we report that structural modulation of the bismuth oxide nanosheet via Zn^(2+)cooperation has a profound positive effect on exposure of the active plane,thereby contributing to high electrocatalytic CO_(2)RR performance.The obtained Zn-Bi_(2)O_(3)catalyst demonstrates superior selectivity towards formate generation in a wide potential range;a high Faradaic efficiency of 95%and a desirable partial current density of around 20 mA·cm^(-2)are obtained at−0.9 V(vs.reversible hydrogen electrode(RHE)).As proposed by density functional theory calculations,Zn substitution is the most energetically feasible for forming and stabilizing the key OCHO*intermediate among the used metal ions.Moreover,the more negative adsorption energy of OCHO*and the relatively low energy barrier for the desorption of HCOOH*are responsible for the enhanced activity and selectivity.展开更多
In this paper we report the preparation of nano-dendritic Cu_(2)O/Cu heterojunctions doped with varying concentrations of cobalt through a convenient,energy-consumption-free,and environmentally friendly chemical repla...In this paper we report the preparation of nano-dendritic Cu_(2)O/Cu heterojunctions doped with varying concentrations of cobalt through a convenient,energy-consumption-free,and environmentally friendly chemical replacement method.The analysis results reveal that the incorporation of cobalt in its atomic form enhances the adsorption of nitrate species onto the catalyst surface,whereas doping with metallic cobalt promotes the production of active hydrogen(*H).By adjusting the doping concentration of cobalt,we effectively control its doping form(atomic and metallic states)on the surface of dendritic copper,thereby enabling controllable modulation of the active hydrogen concentration on the catalyst surface.By ensuring sufficient consumption of*H during the NITRR process while avoiding excessively high concentrations that could trigger detrimental hydrogen evolution reaction side reactions,this approach remarkably enhances the selectivity of ammonia synthesis in NITRR.This study offers an effective approach to regulate the*H concentration on the surface of the catalyst through adjusting the metal doping form,thereby improving the performance of ammonia synthesis from NITRR.展开更多
Current methods for the detection of differential gene expression focus on finding individual genes that may be responsible for certain diseases or external irritants. However, for common genetic diseases, multiple ge...Current methods for the detection of differential gene expression focus on finding individual genes that may be responsible for certain diseases or external irritants. However, for common genetic diseases, multiple genes and their interactions should be understood and treated together during the exploration of disease causes and possible drug design. The present study focuses on analyzing the dynamic patterns of co-regulated modules during biological progression and determining those having remarkably varying activities, using the yeast cell cycle as a case study. We first constructed dynamic active protein-protein interaction networks by modeling the activity of proteins and assembling the dynamic co-regulation protein network at each time point. The dynamic active modules were detected using a method based on the Bayesian graphical model and then the modules with the most varied dispersion of clustering coefficients, which could be responsible for the dynamic mechanism of the cell cycle, were identified. Comparison of results from our functional module detection with the state-of-art functional module detection methods and validation of the ranking of activities of functional modules using GO annotations demonstrate the efficacy of our method for narrowing the scope of possible essential responding modules that could provide multiple targets for biologists to further experimentally validate.展开更多
An all-fiber acousto-optic modulator(AOM), which features a compact structure and a low-driving voltage, is experimentally demonstrated for the active mode-locking of a fiber laser. The proposed AOM is based on the sh...An all-fiber acousto-optic modulator(AOM), which features a compact structure and a low-driving voltage, is experimentally demonstrated for the active mode-locking of a fiber laser. The proposed AOM is based on the short length of the cladding-etched fiber, the ends of which are fixed on a slide glass. On top of the cladding-etched fiber, a piezoelectric transducer was overlaid. A chemical wet-etching technique, which is based on a mixed solution of NH_4F and (NH_4)2SO_4, is used to reduce the fiber diameter down to ～25 μm, and the length of the etched section is only 0.5 cm. The fabricated device exhibited a modulation depth of 73.10% at an acoustic frequency of 918.9 kHz and a peak-to-peak electrical voltage of 10 V, while a laser beam was coupled at 1560 nm.By using the prepared AOM within an erbium-doped-fiber ring cavity, the mode-locked pulses with a temporalwidth of 2.66 ps were readily obtained at a repetition rate of 1.838 MHz.展开更多
A simplified simulation method based on the FDTD technique that can handle active devices is proposed. This method well suits the electrical crosstalk analysis of multi-channel integrated, opto-electronic mixed module...A simplified simulation method based on the FDTD technique that can handle active devices is proposed. This method well suits the electrical crosstalk analysis of multi-channel integrated, opto-electronic mixed modules. We apply this method to an 8-channel integrated super-compact high-sensitivity optical module. The results show good agreement between simulations and measurements.展开更多
基金supported by grants from the Key Strategic Science and Technology Cooperation Project of the Ministry of Science and Technology of China(2023YFE0206800)the National Natural Science Foundation of China(81625006,31820103005,32200620,32170976,81971874)+1 种基金Zhejiang Province Natural Science Foundation of China(LZ24C090003 and LY21C090003)the Peak Discipline Cultivation Program of Zhejiang University School of Basic Medicine.
文摘Dear Editor,It is now well established that optogenetic stimulation can achieve precise intervention and modulate the activity of local neurons or neural circuits in the brain.Although this technique holds promise for clinical therapy for neurological and psychiatric disorders,it requires the expression of lightsensitive proteins(such as channel rhodopsin)or photoactivatable chemicals(such as caged neurotransmitters)in the targeted brain regions[1].
基金financially supported by the National Key Research and Development Program of China(2022YFE03170002)the National Natural Science Foundation of China(52071286,U203020852171223)。
文摘ZrCo alloy holds great promise for hydrogen isotope storage,yet its susceptibility to poisoning by impurity gases,especially CO,poses a challenge.This susceptibility arises due to the electron acceptor nature of the surface Co element and the formation of the d-πfeedback bond,thereby impeding the surface hydrogen dissociation.Accordingly,we propose a novel local activity modulation strategy,where substituent elements are sacrificed to protect the active Co sites for hydrogen dissociation.Considering CO absorption capacity,solid solubility,and hydrogen affinity,we selected V,Cr,and Mn as microalloying elements and successfully prepared the single-phase ZrCo_(0.97)(VCrMn)_(0.03)alloy.Compared to pristine ZrCo,ZrCo_(0.97)(VCrMn)_(0.03)demonstrates significantly enhanced poisoning resistance.Notably,the hydrogenation kinetics of ZrCo_(0.97)(VCrMn)_(0.03)is 2.4 times higher than that of ZrCo in 4 bar H_(2)+5000 ppm CO.Interestingly,the controllable in situ formation of the Co_(2)C phase shell structure during cycling further safeguards the surface reactivity of ZrCo_(0.97)(VCrMn)_(0.03).Consequently,its capacity retention ratio after 25 cycles has been improved to 74.5%from 55.3%of the ZrCo alloy.These findings suggest that micro-alloying engineering could be a promising strategy for surface activity modulation to enhance the anti-poisoning properties of hydrogen storage materials.
文摘Fe-based catalysts are widely used for CO_(2)hydrogenation to light olefins(C_(2–4)=);however,precise regulation of active phases and the balance between intermediate reactions remain significant challenges.Herein,we find that the addition of moderate amounts of Ti forms a strong interaction with Fe compositions,modulating the Fe_(3)O_(4)and Fe_(5)C_(2)contents.Enhanced interaction leads to an increased Fe_(5)C_(2)/Fe_(3)O_(4)ratio,which in turn enhances the adsorption of reactants and intermediates,promoting CO hydrogenation to unsaturated alkyl groups and facilitating C–C coupling.Furthermore,the strong Fe-Ti interaction induces the preferential growth of Fe_(5)C_(2)into prismatic structures that expose the(020),(–112),and(311)facets,forming compact active interfacial sites with Fe_(3)O_(4)nanoparticles.These facet and interfacial effects significantly promote the synergistic coupling of the reverse water gas shift and Fischer-Tropsch reactions.The optimized 3K/FeTi catalyst with the highest Fe_(5)C_(2)/Fe_(3)O_(4)ratio of 3.6 achieves a 52.2%CO_(2)conversion rate,with 44.5%selectivity for C2–4=and 9.5%for CO,and the highest space-time yield of 412.0 mg gcat^(–1)h^(–1)for C_(2–4)=.
基金supported by the National Natural Science Foundation of China (Nos.51972049 and 51672040)the Jilin Province Development and Reform Commission (No.2021C040-4).
文摘Layered double hydroxides(LDHs)are promising electrode candidates for supercapacitors.However,lim-itations like inferior cycling stability and unsatisfactory charge storage capability at low temperatures have exerted negative effects on their applications.Herein,a novel synthetic process has been elaborately designed and provided to have the composition and structure of the C/N-NiCoMn-LDH/Ag(C/N-CNMA)delicately regulated.Both the experimental and theoretical researches unveil that the incorporated manganese species and elemental silver could dramatically modulate the bandgap,crystallinity and surface electron structure of the LDH,leading to the remarkable improvement in its conductivity,exposed active sites and intrinsic electrochemical activity,and thus the OH^(*)and O^(*)adsorption free energy could be remarkably optimized,even at low temperatures.In addition,the low crystallinity C/N-CNMA is of great electrochemical compatibility with both the KOH aqueous electrolyte and the isobutyl alcohol(IPA)modulated organohydrogel electrolyte.By means of adjusting the solvation and hydrogen bonding in the electrolytes,the assembled hybrid supercapacitors deliver excellent energy density,power density and cycling stability in the temperature range of-30 to 25℃.Specifically,the gel electrolyte with IPA as the anti-freezing functional additive displays high flexibility and ionic conductivity at low temperatures.
基金funded by Hubei Science and Technology Plan Key Project(G2019ABA100)Open fund of Hubei Key Laboratory of Economic Forest Germplasm Improvement and Resources Comprehensive Utilization(201932103)fund from Assessment and Comprehensive Utilization of Characteristic Biological resources in Dabie Mountains(4022019006)。
文摘Oolong tea,partially fermented from Camellia sinensis leaves,exhibits significant antioxidative,anti-inflammatory,and anti-cancer activities as indicated in several in vitro and in vivo studies.However,studies on health promoting effects of oolong tea and its characteristic compounds are limited.The potential efficacy of bioactives derived from oolong tea and their roles as promising anticancer agents,their cardio-protective benefits during hypoxic conditions,effects in treating allergic disorders,potential prebiotic activities,improvement of blood lipid status in human beings,effectivity as oral hypoglycemic agent in the treatment of type 2 diabetes,and their potentials to reduce the risk of obesity have been discussed in this review.These promising studies mainly gained from animal studies might broaden the consumption and usage of the phenolic-enriched oolong tea and its products in food and pharmaceutical industries.However,potential health beneficial effects of oolong tea in humans should be further complemented by large-sized,randomized double-blind and placebo-controlled trials to consolidate potential therapeutic applications.
基金supported by the National Natural Science Foundation of China(Nos.22279160 and 22109134)Guangdong Basic and Applied Basic Research Foundation(2022A1515010920)+3 种基金the Outstanding Youth Basic Research Project of Shenzhen(RCYX20221008092934093)the China Postdoctoral Science Foundation(2023M733670)Special Research Assistant Funding Project of the Chinese Academy of Sciencessupported by the public computing service platform provided by SIAT.
文摘Aqueous zinc ion batteries(AZIBs)are a promising energy storage technology due to their cost-effectiveness and safety.Organic materials with sustainable and designable structures are of great interest as AZIBs cath-odes.However,small molecules in organic cathode materials face dissolution problems and suboptimal cycle life,whereas large molecules suffer from a low theoretical capacity due to their inert carbon skeletons.Here,we designed two covalent organic framework(COF)materials(benzoquinoxaline benzoquinone-based COF(BB-COF)and triquinoxalinylene benzoquinone-based COF(TB-COF))with the same structure and number of energy storage groups to investigate the correlation between the densities of active sites and electrochemi-cal performance.We conclude that the electrochemical behavior of organic conjugate-based energy storage materials lacks a linear correlation with active site quantity.Adjusting active site densities is crucial for mate-rial advancement.BB-COF and TB-COF with dual active sites(C=O and C=N)exhibit distinct characteristics.TB-COF,which has dense active groups,shows a high initial capacity(222 mAh g^(-1)).Conversely,BB-COF,which features a large conjugated ring diameter,presents superior rate performance and enduring cycle stability.It even maintains stable cycling for 2000 cycles at-40℃.In-situ electrochemical quartz crystal mic-robalance tests reveal the energy storage mechanism of BB-COF,in which H+storage is followed by Zn2+storage.
文摘Although many proteins have been found to exist as homooligomers in nature, the biological significance and mechanism for its occurring is far from clear. We have examined a variety
基金supported by the Singapore Ministry of Education Academic Research Fund Tier 1(Nos.RG 85/20 and 125/21)the National Natural Science Foundation of China(No.U20A200201)+1 种基金China Postdoctoral Science Fund,No.3 Special Funding(Pre-Station)(No.2021TQ007)natural science program on basic research project of Shaanxi province(No.2023-JC-QN-0155).
文摘Formic acid is considered one of the most economically viable products for electrocatalytic CO_(2)reduction reaction(CO_(2)RR).However,developing highly active and selective electrocatalysts for effective CO_(2)conversion remains a grand challenge.Herein,we report that structural modulation of the bismuth oxide nanosheet via Zn^(2+)cooperation has a profound positive effect on exposure of the active plane,thereby contributing to high electrocatalytic CO_(2)RR performance.The obtained Zn-Bi_(2)O_(3)catalyst demonstrates superior selectivity towards formate generation in a wide potential range;a high Faradaic efficiency of 95%and a desirable partial current density of around 20 mA·cm^(-2)are obtained at−0.9 V(vs.reversible hydrogen electrode(RHE)).As proposed by density functional theory calculations,Zn substitution is the most energetically feasible for forming and stabilizing the key OCHO*intermediate among the used metal ions.Moreover,the more negative adsorption energy of OCHO*and the relatively low energy barrier for the desorption of HCOOH*are responsible for the enhanced activity and selectivity.
文摘In this paper we report the preparation of nano-dendritic Cu_(2)O/Cu heterojunctions doped with varying concentrations of cobalt through a convenient,energy-consumption-free,and environmentally friendly chemical replacement method.The analysis results reveal that the incorporation of cobalt in its atomic form enhances the adsorption of nitrate species onto the catalyst surface,whereas doping with metallic cobalt promotes the production of active hydrogen(*H).By adjusting the doping concentration of cobalt,we effectively control its doping form(atomic and metallic states)on the surface of dendritic copper,thereby enabling controllable modulation of the active hydrogen concentration on the catalyst surface.By ensuring sufficient consumption of*H during the NITRR process while avoiding excessively high concentrations that could trigger detrimental hydrogen evolution reaction side reactions,this approach remarkably enhances the selectivity of ammonia synthesis in NITRR.This study offers an effective approach to regulate the*H concentration on the surface of the catalyst through adjusting the metal doping form,thereby improving the performance of ammonia synthesis from NITRR.
基金supported by the National Natural Science Foundation of China (No.30970780)Ph.D.Programs Foundation of Ministry of Education of China (No.20091103110005)
文摘Current methods for the detection of differential gene expression focus on finding individual genes that may be responsible for certain diseases or external irritants. However, for common genetic diseases, multiple genes and their interactions should be understood and treated together during the exploration of disease causes and possible drug design. The present study focuses on analyzing the dynamic patterns of co-regulated modules during biological progression and determining those having remarkably varying activities, using the yeast cell cycle as a case study. We first constructed dynamic active protein-protein interaction networks by modeling the activity of proteins and assembling the dynamic co-regulation protein network at each time point. The dynamic active modules were detected using a method based on the Bayesian graphical model and then the modules with the most varied dispersion of clustering coefficients, which could be responsible for the dynamic mechanism of the cell cycle, were identified. Comparison of results from our functional module detection with the state-of-art functional module detection methods and validation of the ranking of activities of functional modules using GO annotations demonstrate the efficacy of our method for narrowing the scope of possible essential responding modules that could provide multiple targets for biologists to further experimentally validate.
基金National Research Foundation of Korea(NRF)(2015R1A2A2A04006979,2015R1A2A2A11000907)Institute for Information and Communications Technology Promotion(IITP-2017-2015-0-00385)
文摘An all-fiber acousto-optic modulator(AOM), which features a compact structure and a low-driving voltage, is experimentally demonstrated for the active mode-locking of a fiber laser. The proposed AOM is based on the short length of the cladding-etched fiber, the ends of which are fixed on a slide glass. On top of the cladding-etched fiber, a piezoelectric transducer was overlaid. A chemical wet-etching technique, which is based on a mixed solution of NH_4F and (NH_4)2SO_4, is used to reduce the fiber diameter down to ～25 μm, and the length of the etched section is only 0.5 cm. The fabricated device exhibited a modulation depth of 73.10% at an acoustic frequency of 918.9 kHz and a peak-to-peak electrical voltage of 10 V, while a laser beam was coupled at 1560 nm.By using the prepared AOM within an erbium-doped-fiber ring cavity, the mode-locked pulses with a temporalwidth of 2.66 ps were readily obtained at a repetition rate of 1.838 MHz.
文摘A simplified simulation method based on the FDTD technique that can handle active devices is proposed. This method well suits the electrical crosstalk analysis of multi-channel integrated, opto-electronic mixed modules. We apply this method to an 8-channel integrated super-compact high-sensitivity optical module. The results show good agreement between simulations and measurements.
