This study presents high-power mode-selective operation in a large-mode-area(LMA)fiber laser.A spatial modeadaptive control system incorporating a 5×1 photonic lantern was employed to facilitate mode conversion b...This study presents high-power mode-selective operation in a large-mode-area(LMA)fiber laser.A spatial modeadaptive control system incorporating a 5×1 photonic lantern was employed to facilitate mode conversion between the LP01 and LP11 modes.The coherence length between the five single-mode arms and the stimulated Brillouin scattering threshold in the amplifier were well balanced by tuning the seed linewidth.In addition,the specific design of the fiber amplifier's bending radius enabled stable mode-selective output with high mode purity.Consequently,a nearfundamental mode control was achieved in a 42-μm LMA fiber laser,yielding a beam quality M^(2)factor of 1.97 at an output power of 1 kW.Subsequently,a stable LP_(11)mode laser output with an output power of 219 W and an optical conversion efficiency of 75%was obtained.This research provides a significant technical foundation for the modeselective operation of high-power LMA fiber lasers.展开更多
The ballet Raise the Red Lantern created by The National Ballet of China in 2001 combines the beauty of dance,op?era and dance in a reasonable and precise layout.In order to better express the theme and increase the v...The ballet Raise the Red Lantern created by The National Ballet of China in 2001 combines the beauty of dance,op?era and dance in a reasonable and precise layout.In order to better express the theme and increase the visual aesthetics of dance dra?ma,the director has used a large number of art symbols.From the perspective of art symbols,this paper analyses the color,composi?tion and shape of the dance drama,the role and significance of the performance theme in it,and its presentation of visual beauty of dance drama.展开更多
As a unique form of folk art, colored Chinese lantern boasts a long history and rich resources, able to break the barriers and restrictions between languages. It can tell a story of China very well.
The word“geda”,as a typical example of partitive in Shaanxi local dialect,appears 40 times in Jia Pingwa’s novel Daideng,but with varied translation equivalents in its English version The Lantern Bearer,where this ...The word“geda”,as a typical example of partitive in Shaanxi local dialect,appears 40 times in Jia Pingwa’s novel Daideng,but with varied translation equivalents in its English version The Lantern Bearer,where this article raised its doubts about how a proper translation of partitive can transmit culture in a more authentic and loyal way.From the perspective of cultural schema theory,this article takes The Lantern Bearer1 as the basis of text analysis to explore the translation strategy of the partitive“geda”in the context of cultural correspondence before relevant translation models are proposed with the purpose to shed light on Shaanxi local literature translation into English.展开更多
This book contains 46 recent essays written by the author and is divided into five volumes:"Picturesque Nostalgia,""Aftertaste of Youth,""The Past as the Wind,""Exotic Dew,"and&...This book contains 46 recent essays written by the author and is divided into five volumes:"Picturesque Nostalgia,""Aftertaste of Youth,""The Past as the Wind,""Exotic Dew,"and"Taste of Life."The author affectionately describes the memories of his hometown,relatives,and the past,as well as the true meaning of life while walking and reading in a foreign land.展开更多
We present the design, fabrication, and characterization of a dual polarization, mode-selective photonic lantern(PL) spatial multiplexer supporting three fiber modes (LP_(01), LP^(a)_(11), LP^(b)_(11)), measuring only...We present the design, fabrication, and characterization of a dual polarization, mode-selective photonic lantern(PL) spatial multiplexer supporting three fiber modes (LP_(01), LP^(a)_(11), LP^(b)_(11)), measuring only 300μm in length, for converting between three single-mode input sources and a single three-mode optical fiber. The PL is fabricated directly on the three sources, in this case three cores of a multi-core fiber, using a commercial two-photon polymerization-based 3D nanoprinter. Despite the diminutive size and high index contrast of the polymer core/air cladding waveguides, we observed low insertion loss multiplexing (less than-1.7 d B), low polarization dependent loss (less than-0.25 dB), mode dependent loss of-1.7 d B, low wavelength dependence, and mode group crosstalk of less than-16 dB. We demonstrate mode group multiplexed transmission using our mode-selective multiplexer/demultiplexer pair and a short three-mode fiber link in an on-off keying intensity modulation/direct detection(IM/DD) experiment, recovering two 12.5 Gb/s signals without MIMO processing.展开更多
Zhang Yimou’s Raise the Red Lantern is adapted from Su Tong’s novel Wives and Concubines.By employingliterature,film and media,both works construct their narrative through object-based metaphors,yielding markedly di...Zhang Yimou’s Raise the Red Lantern is adapted from Su Tong’s novel Wives and Concubines.By employingliterature,film and media,both works construct their narrative through object-based metaphors,yielding markedly differentartistic effects.This paper employs case analysis and comparative research to examine the core objects in both works,discussingthe specific pathways through which these objects are transformed from textual’symbols into cinematic ones.By contrasting thedifferences in how these symbols manifest across media,it reveals their underlying cultural connotations and thematicexpressions.Based on the emblematic objects,including red lanterns,flutes,and natural landscapes,the study argues that theaddition,deletion,and reconstruction of objects alongside their cultural motivations are crucial for understanding literarycinematicinteraction.展开更多
This study presents a high-accuracy,all-fber mode division multiplexing(MDM)reconstructive spectrometer(RS).The MDM was achieved by utilizing a custom-designed 3×1 mode-selective photonics lantern to launch disti...This study presents a high-accuracy,all-fber mode division multiplexing(MDM)reconstructive spectrometer(RS).The MDM was achieved by utilizing a custom-designed 3×1 mode-selective photonics lantern to launch distinct spatial modes into the multimode fber(MMF).This facilitated the information transmission by increasing light scattering processes,thereby encoding the optical spectra more comprehensively into speckle patterns.Spectral resolution of 2 pm and the recovery of 2000 spectral channels were accomplished.Compared to methods employing single-mode excitation and two-mode excitation,the three-mode excitation method reduced the recovered error by 88%and 50%respectively.A resolution enhancement approach based on alternating mode modulation was proposed,reaching the MMF limit for the 3 dB bandwidth of the spectral correlation function.The proof-of-concept study can be further extended to encompass diverse programmable mode excitations.It is not only succinct and highly efcient but also well-suited for a variety of high-accuracy,high-resolution spectral measurement scenarios.展开更多
Broadband mode converters are essential devices for space-division and wavelength-division multiplexing systems.There are great challenges in the generation of higher-order modes above the third order with low loss an...Broadband mode converters are essential devices for space-division and wavelength-division multiplexing systems.There are great challenges in the generation of higher-order modes above the third order with low loss and high mode purity employing all-fiber devices.In this paper,an all-fiber LP_(41)mode converter is proposed and fabricated by tapering a nine-core single-mode fiber bundle.Experimental results indicate that this all-fiber LP_(41)mode converter is low-loss,high-purity,and ultrabroadband.The insertion loss is less than 0.4 dB.The purity of odd LP_(41)at 1310 nm is 95.09%,and the operating bandwidth exceeds 280 nm.展开更多
Let S be a hyperbolic Riemann surface with a finite area. Let G be the covering group of S acting on the hyperbolic plane H. In this paper, the author studies some algebraic relations in the mapping class group of S f...Let S be a hyperbolic Riemann surface with a finite area. Let G be the covering group of S acting on the hyperbolic plane H. In this paper, the author studies some algebraic relations in the mapping class group of S for S = S／{a point}. The author shows that the only possible relations between products of two Dehn twists and products of mapping classes determined by two parabolic elements of G are the reduced lantern relations. As a consequence, a partial solution to a problem posed by J. D. McCarthy is obtained.展开更多
This paper examines in a comparative manner how remembering and forgetting contribute to self-constitution in Walker Percy＇s The Last Gentleman and William Alexander Percy＇s Lanterns on the Levee. In The Last Gentle...This paper examines in a comparative manner how remembering and forgetting contribute to self-constitution in Walker Percy＇s The Last Gentleman and William Alexander Percy＇s Lanterns on the Levee. In The Last Gentleman, Will Barrett embarks upon a journey from the North to the South in quest of identity. Lanterns on the Levee features a similar identity quest pursued, this time, by an autobiographer who records the very process of this quest rather than representing it by a fictional character. Percy the stoic restores realness to people in a lost world, from whom he derives his self and in whom his self is deeply rooted, by remem- bering the personally significant and good past and forgetting the personally insignificant and evil present. In so doing, he not only asserts his personal identity but continues to construct it in an imaginative way. Will, by contrast, seeks to constitute and ascertain his stoic identity both by attempting to forget the every- dayness of ordinary life and thereby establish a genuine relationship with people and by undertaking the pursuit of a fatherly figure who echoes his tenacious memory of his father. Both Will and Percy, however, may be called what Kierkegaard calls a knight of infinite resignation.展开更多
In the winter of 2017,southern France was hit by the most severe freeze in a decade,and yet the southern city of Gaiaque,with a population of just 10,000,had 250,000 visitors in town.What attracted them to brave the c...In the winter of 2017,southern France was hit by the most severe freeze in a decade,and yet the southern city of Gaiaque,with a population of just 10,000,had 250,000 visitors in town.What attracted them to brave the cold and rain to visit the small city?A Chinese lantern festival,the first kind of it in France.The lantern festival,jointly展开更多
基金supported by the National Natural Science Foundation of China(Grant No.12074432)。
文摘This study presents high-power mode-selective operation in a large-mode-area(LMA)fiber laser.A spatial modeadaptive control system incorporating a 5×1 photonic lantern was employed to facilitate mode conversion between the LP01 and LP11 modes.The coherence length between the five single-mode arms and the stimulated Brillouin scattering threshold in the amplifier were well balanced by tuning the seed linewidth.In addition,the specific design of the fiber amplifier's bending radius enabled stable mode-selective output with high mode purity.Consequently,a nearfundamental mode control was achieved in a 42-μm LMA fiber laser,yielding a beam quality M^(2)factor of 1.97 at an output power of 1 kW.Subsequently,a stable LP_(11)mode laser output with an output power of 219 W and an optical conversion efficiency of 75%was obtained.This research provides a significant technical foundation for the modeselective operation of high-power LMA fiber lasers.
文摘The ballet Raise the Red Lantern created by The National Ballet of China in 2001 combines the beauty of dance,op?era and dance in a reasonable and precise layout.In order to better express the theme and increase the visual aesthetics of dance dra?ma,the director has used a large number of art symbols.From the perspective of art symbols,this paper analyses the color,composi?tion and shape of the dance drama,the role and significance of the performance theme in it,and its presentation of visual beauty of dance drama.
文摘As a unique form of folk art, colored Chinese lantern boasts a long history and rich resources, able to break the barriers and restrictions between languages. It can tell a story of China very well.
基金supported by the Scientific Research Funds of the Educational Department of Shaanxi Provincial Government(Grant No.16JK1731)Shaanxi International Chinese Education Research Association(Grant No.2022HZ1478).
文摘The word“geda”,as a typical example of partitive in Shaanxi local dialect,appears 40 times in Jia Pingwa’s novel Daideng,but with varied translation equivalents in its English version The Lantern Bearer,where this article raised its doubts about how a proper translation of partitive can transmit culture in a more authentic and loyal way.From the perspective of cultural schema theory,this article takes The Lantern Bearer1 as the basis of text analysis to explore the translation strategy of the partitive“geda”in the context of cultural correspondence before relevant translation models are proposed with the purpose to shed light on Shaanxi local literature translation into English.
文摘This book contains 46 recent essays written by the author and is divided into five volumes:"Picturesque Nostalgia,""Aftertaste of Youth,""The Past as the Wind,""Exotic Dew,"and"Taste of Life."The author affectionately describes the memories of his hometown,relatives,and the past,as well as the true meaning of life while walking and reading in a foreign land.
文摘We present the design, fabrication, and characterization of a dual polarization, mode-selective photonic lantern(PL) spatial multiplexer supporting three fiber modes (LP_(01), LP^(a)_(11), LP^(b)_(11)), measuring only 300μm in length, for converting between three single-mode input sources and a single three-mode optical fiber. The PL is fabricated directly on the three sources, in this case three cores of a multi-core fiber, using a commercial two-photon polymerization-based 3D nanoprinter. Despite the diminutive size and high index contrast of the polymer core/air cladding waveguides, we observed low insertion loss multiplexing (less than-1.7 d B), low polarization dependent loss (less than-0.25 dB), mode dependent loss of-1.7 d B, low wavelength dependence, and mode group crosstalk of less than-16 dB. We demonstrate mode group multiplexed transmission using our mode-selective multiplexer/demultiplexer pair and a short three-mode fiber link in an on-off keying intensity modulation/direct detection(IM/DD) experiment, recovering two 12.5 Gb/s signals without MIMO processing.
文摘Zhang Yimou’s Raise the Red Lantern is adapted from Su Tong’s novel Wives and Concubines.By employingliterature,film and media,both works construct their narrative through object-based metaphors,yielding markedly differentartistic effects.This paper employs case analysis and comparative research to examine the core objects in both works,discussingthe specific pathways through which these objects are transformed from textual’symbols into cinematic ones.By contrasting thedifferences in how these symbols manifest across media,it reveals their underlying cultural connotations and thematicexpressions.Based on the emblematic objects,including red lanterns,flutes,and natural landscapes,the study argues that theaddition,deletion,and reconstruction of objects alongside their cultural motivations are crucial for understanding literarycinematicinteraction.
基金supported by the National Natural Science Foundation of China(NSFC)(Grant No.62305391)Hunan Innovative Province Construction Project(No.2019RS3017)Scientifc Fund of National University of Defense Technology(No.22-061).
文摘This study presents a high-accuracy,all-fber mode division multiplexing(MDM)reconstructive spectrometer(RS).The MDM was achieved by utilizing a custom-designed 3×1 mode-selective photonics lantern to launch distinct spatial modes into the multimode fber(MMF).This facilitated the information transmission by increasing light scattering processes,thereby encoding the optical spectra more comprehensively into speckle patterns.Spectral resolution of 2 pm and the recovery of 2000 spectral channels were accomplished.Compared to methods employing single-mode excitation and two-mode excitation,the three-mode excitation method reduced the recovered error by 88%and 50%respectively.A resolution enhancement approach based on alternating mode modulation was proposed,reaching the MMF limit for the 3 dB bandwidth of the spectral correlation function.The proof-of-concept study can be further extended to encompass diverse programmable mode excitations.It is not only succinct and highly efcient but also well-suited for a variety of high-accuracy,high-resolution spectral measurement scenarios.
基金supported by the National Key Research and Development Program of China(No.2018YFB1801802)the National Natural Science Foundation of China(Nos.61835006 and 62375143)。
文摘Broadband mode converters are essential devices for space-division and wavelength-division multiplexing systems.There are great challenges in the generation of higher-order modes above the third order with low loss and high mode purity employing all-fiber devices.In this paper,an all-fiber LP_(41)mode converter is proposed and fabricated by tapering a nine-core single-mode fiber bundle.Experimental results indicate that this all-fiber LP_(41)mode converter is low-loss,high-purity,and ultrabroadband.The insertion loss is less than 0.4 dB.The purity of odd LP_(41)at 1310 nm is 95.09%,and the operating bandwidth exceeds 280 nm.
文摘Let S be a hyperbolic Riemann surface with a finite area. Let G be the covering group of S acting on the hyperbolic plane H. In this paper, the author studies some algebraic relations in the mapping class group of S for S = S／{a point}. The author shows that the only possible relations between products of two Dehn twists and products of mapping classes determined by two parabolic elements of G are the reduced lantern relations. As a consequence, a partial solution to a problem posed by J. D. McCarthy is obtained.
文摘This paper examines in a comparative manner how remembering and forgetting contribute to self-constitution in Walker Percy＇s The Last Gentleman and William Alexander Percy＇s Lanterns on the Levee. In The Last Gentleman, Will Barrett embarks upon a journey from the North to the South in quest of identity. Lanterns on the Levee features a similar identity quest pursued, this time, by an autobiographer who records the very process of this quest rather than representing it by a fictional character. Percy the stoic restores realness to people in a lost world, from whom he derives his self and in whom his self is deeply rooted, by remem- bering the personally significant and good past and forgetting the personally insignificant and evil present. In so doing, he not only asserts his personal identity but continues to construct it in an imaginative way. Will, by contrast, seeks to constitute and ascertain his stoic identity both by attempting to forget the every- dayness of ordinary life and thereby establish a genuine relationship with people and by undertaking the pursuit of a fatherly figure who echoes his tenacious memory of his father. Both Will and Percy, however, may be called what Kierkegaard calls a knight of infinite resignation.
文摘In the winter of 2017,southern France was hit by the most severe freeze in a decade,and yet the southern city of Gaiaque,with a population of just 10,000,had 250,000 visitors in town.What attracted them to brave the cold and rain to visit the small city?A Chinese lantern festival,the first kind of it in France.The lantern festival,jointly
