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In-situ tracking of organic reaction dynamics:an infrared-temperature dual sensing approach using a single chalcogenide fiber 认领 引用
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作者 XINXIANG HUANG SHILIANG KANG +4 位作者 YANQING FU LINLING TAN CHENGWEI GAO SHIXUN DAI CHANGGUI LIN 《Photonics Research》 SCIE EI CAS CSCD 2026年第6期2418-2427,共10页
Precise control over organic reaction dynamic requires in-situ insight into temperature and concentration variations.However,conventional detection strategies,often relying on off-line or decoupled methods,suffer from... Precise control over organic reaction dynamic requires in-situ insight into temperature and concentration variations.However,conventional detection strategies,often relying on off-line or decoupled methods,suffer from delayed responses and poor temporal synchronization.Herein,we propose a bifunctional single-fiber sensor based on Ge5As25Se30Te40 chalcogenide glass,which seamlessly integrates fiber evanescent wave spectroscopy for chemical fingerprinting identification with a thermoresistive effect for thermal sensing.It exhibits exceptional performance with a rapid temperature response(~2.6 s)and a high temperature sensitivity(jTCRj~4.07%K-1).Validated through the in-situ monitoring of ethyl butyrate synthesis,the single-fiber sensor effectively tracked reaction evolution and thermal distinctness,providing reliable guidance for process optimization and control.With its label-free detection,structural simplicity,and high sensitivity,this proposed strategy represents a robust process analytical technology tool for monitoring complex organic reactions. 展开更多
关键词 chemical fingerprinting identification situ tracking fiber evanescent wave spectroscopy thermoresistive effect infrared temperature dual sensing detection strategiesoften precise control organic reaction dynamic organic reaction dynamics
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Generation of a high-power,broadband supercontinuum spanning from visible to mid-infrared via incoherent beam combination in a GeO2-core fiber bundle 认领 引用
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作者 Kai Xia Ruipeng Hou +11 位作者 Xuzhao Zhang Chonghao Huang Lele Yu Biaoqi Wen Chao Chen Zhilin Zhang Zhicheng Zhang Chao Mei Xing Luo Peilong Yang Shixun Dai Qiuhua Nie 《High Power Laser Science and Engineering》 SCIE EI CAS CSCD 2026年第2期20-27,共8页
In this work,we experimentally demonstrate a high-power supercontinuum(SC)that covers from visible to mid-infrared(MIR)in a GeO2-core fiber(GCF)bundle via incoherent beam combination.In the experiment,the SC generatio... In this work,we experimentally demonstrate a high-power supercontinuum(SC)that covers from visible to mid-infrared(MIR)in a GeO2-core fiber(GCF)bundle via incoherent beam combination.In the experiment,the SC generation in a single GCF was initially explored,and an SC spanning from visible to MIR regions was obtained,with average power of less than 10 W.To increase the output power,we fabricated a 3×1 high-power GCF-based tapered fiber bundle,incoherently combining three channels of the previously mentioned replicas.This yielded a broadband SC spectrum with a maximum average power of 23.1 W and a spectral bandwidth covering 0.73–3.1μm.The obtained spectrum power fluctuation was measured over 1 hour,showing a root mean square value of 0.7%.To the best of our knowledge,this represents the highest power SC from visible to MIR regions obtained in GCFs pumped by 1.55μm high-power pulses. 展开更多
关键词 all-fiber laser beam combination GeO2-core fiber supercontinuum generation tapered fiber bundle
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CsCl Effected Ultrafast Third-order Optical Nonlinearities of GeS_2-Sb_2S_3 Chalcogenide Glasses 认领 引用
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作者 Hua Zhang Qiuhua Nie +3 位作者 Shixun Dai Xiang Shen Xunsi Wang Xianghua Zhang 《Journal of Materials Science & Technology》 SCIE EI CAS 2009年第6期772-776,共5页
A series of alkali halide doped chalcohalide glasses (100-x)(0.9GeS2-0.1Sb2S3)-xCsCl (x=5, 10, 15 and 20 mole fraction) were prepared. The absorption spectra and Raman scatting spectra of these glasses were meas... A series of alkali halide doped chalcohalide glasses (100-x)(0.9GeS2-0.1Sb2S3)-xCsCl (x=5, 10, 15 and 20 mole fraction) were prepared. The absorption spectra and Raman scatting spectra of these glasses were measured. The optical band gaps Eopt were obtained from ultraviolet absorption edges. Z-scan technique was utilized to investigate the third-order nonlinear optical properties of GeS2-Sb2S3-CsCl glasses. The value of Eopt increases and the third-order optical nonlinearity decreases with increasing CsCl content. Decreasing lone-pair electron and broadening the band-gap will provide less transition paths for nonlinear process, which play a key role in ultrafast third-order nonlinear optical responses of these chalcohalide glasses. 展开更多
关键词 Optical band gap Microstructural units Optical nonlinearity Chalcohalide glasses
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Production and characterization of highly transparent novel magneto-optical Ho2Zr2O7 ceramics with anion-deficient fluorite structures 认领 引用 被引量:4
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作者 Liangbin Hu Bin Lu +1 位作者 Bowen Xue Shixun Dai 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2023年第19期217-224,共8页
Based on material design idea,we employ a co-precipitation strategy to obtain sinterable Ho2Zr2O7 flu-orite particles,successfully leading to novel transparent Ho2Zr2O7 ceramics with good optical/mag... Based on material design idea,we employ a co-precipitation strategy to obtain sinterable Ho2Zr2O7 flu-orite particles,successfully leading to novel transparent Ho2Zr2O7 ceramics with good optical/magneto-optical properties.The resulting precipitation precursor is identified to be hydrated basic carbonate upon calcination at the optimum temperature of 1250℃into near-spherical Ho2Zr2O7 nanopowder with an average size of~64 nm and unimodal narrow size distribution.The crystal intrinsic oxygen defect in fluorite ceramic generally exists in the form of F+center.The best bulk specimen achieved in this work exhibits a high refractive index of~2.1 and a high transparency of~74.4%at 1000 nm comparable with the corresponding defect-free single crystal(~76.4%in theory).In the Ho2Zr2O7 structure system,the elec-tronic polarizability of O2-anion generally remains constant around 2.2?3 in the visible region and the corresponding optical basicity is approximately 0.9.The developed magneto-optical transparent Ho2Zr2O7 ceramic has Verdet constants of-180±3,-157±5,-87±2,-54±2,and-43±2 rad T-1 m-1 at 515,635,780,980,and 1064 nm,respectively,which are roughly 1.2-fold higher than the commercial TGG crystal. 展开更多
关键词 Transparent ceramics Ho2Zr2O7 Magneto-optical ceramics Fluorite Optical properties
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Fabrication and characterization of Ge-Ga-Sb-S glass microsphere lasers operating at ~1.9 μm 认领 引用 被引量:1
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作者 Kun Yang Shixun Dai +1 位作者 Yuehao Wu Qiuhua Nie 《Chinese Physics B》 SCIE EI CAS CSCD 2018年第11期586-590,共5页
We report the fabrication and characterization of germanium gallium antimony sulfide(Ge–Ga–Sb–S or 2 S2 G, doped with Tm^(3+)ions) microsphere lasers operating at ~1.9-μm spectral band. Compared to the chalc... We report the fabrication and characterization of germanium gallium antimony sulfide(Ge–Ga–Sb–S or 2 S2 G, doped with Tm^(3+)ions) microsphere lasers operating at ~1.9-μm spectral band. Compared to the chalcogenide glasses that are used in previous microsphere lasers, this 2 S2 G glass has a lower transition temperature and a higher characteristic temperature. This implies that 2 S2 G microspheres can be fabricated at lower temperatures and the crystallization problem in the sphere-forming process can be alleviated. We show that hundreds of high-quality microspheres(quality factors higher than 105) of various diameters can be produced simultaneously via a droplet sphere-forming method. Microspheres are coupled with silica fiber tapers for optical characterizations. We demonstrate that Whispering Gallery mode(WGM)patterns in the 1.7–2.0 μm band can be conveniently obtained and that once the pump power exceeds a threshold, single-and multi-mode microsphere lasers can be generated. For a typical microsphere whose diameter is 258.64 μm, we demonstrate its laser threshold is 0.383 mW, the laser wavelength is 1907.38 nm, and the thermal sensitivity of the microsphere laser is29.56 pm/?C. 展开更多
关键词 chalcogenides microspheres laser whispering gallery modes
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Dual-phase coexistence enables to alleviate resistance drift in phase-change films 认领 引用
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作者 Tong Wu Chen Chen +2 位作者 Jinyi Zhu Guoxiang Wang Shixun Dai 《Journal of Semiconductors》 EI CAS CSCD 2024年第7期55-59,共5页
The amorphous phase-change materials with spontaneous structural relaxation leads to the resistance drift with the time for phase-change neuron synaptic devices. Here, we modify the phase change properties of the conv... The amorphous phase-change materials with spontaneous structural relaxation leads to the resistance drift with the time for phase-change neuron synaptic devices. Here, we modify the phase change properties of the conventional Ge_2Sb_2Te_5(GST) material by introducing an SnS phase. It is found that the resistance drift coefficient of SnS-doped GST was decreased from 0.06 to 0.01. It can be proposed that the origin originates from the precipitation of GST nanocrystals accompanied by the precipitation of SnS crystals compared to single-phase GST compound systems. We also found that the decrease in resistance drift can be attributed to the narrowed bandgap from 0.65 to 0.43 eV after SnS-doping. Thus, this study reveals the quantitative relationship between the resistance drift and the band gap and proposes a new idea for alleviating the resistance drift by composition optimization, which is of great significance for finding a promising phase change material. 展开更多
关键词 phase change films X-ray methods resistance drift optical band gap
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Breaking the mid-infrared interconnection barrier:a robust bonding for high-power optics based on liquid-like chalcogenide glass 认领 引用
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作者 Xiange Wang Feng Xiao +12 位作者 Yiming Du Kai Jiao Keke Chen Wei Tang Yuyang Wang Xiang Shen Shixun Dai Maozhi Li Xunsi Wang Shengchuang Bai Rongping Wang Ganapathy Senthil Murugan Barry Luther-Davies 《Light: Science & Applications》 SCIE EI CAS CSCD 2026年第5期1440-1450,共11页
Achieving low-loss optical interfaces between high-refractive-index(n>2)components is critical for mid-infrared photonic systems,yet hindered by the trade-off between refractive index matching,IR transparency and t... Achieving low-loss optical interfaces between high-refractive-index(n>2)components is critical for mid-infrared photonic systems,yet hindered by the trade-off between refractive index matching,IR transparency and thermal stability.Here,we introduce a groundbreaking solution—bonding the optical lenses and fibers with a liquid-like chalcogenide glass,which possesses an ultra-low glass transition temperature below room temperature,high refractive index and exceptional mid-infrared transparency.The basic performances of the liquid glass are characterized and proved by detailed viscosity distribution,mechanical shear and bonding tensile strength measurements.Most of all,the optical transmission and laser delivery of these bonded chalcogenide glass fiber devices demonstrate a significant improvement,with transmission efficiency increasing from 36%to 91%,and laser power delivery from several hundred mW rising to 14.5W at a wavelength near 4μm.Additionally,the system demonstrates long-term stability,maintaining performance over at least 3 months and more than 206 heating-cooling cycles when utilizing this liquid-like glass adhesive.This research not only addresses the challenge of bonding midinfrared optical components but also holds immense promise for advancing integrated mid-infrared optics applications,including spectroscopy,sensing,and imaging. 展开更多
关键词 optical bonding high refractive index components viscosity mid infrared optical lenses fibers thermal stability chalcogenide glass low loss interface
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Design of a coated thinly clad chalcogenide long-period fiber grating refractive index sensor based on dual-peak resonance near the phase matching turning point 认领 引用
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作者 齐倩玉 李耀威 +3 位作者 刘婷 张培晴 戴世勋 徐铁峰 《Chinese Physics B》 SCIE EI CAS CSCD 2023年第1期327-333,共7页
A novel method for designing chalcogenide long-period fiber grating(LPFG) sensors based on the dual-peak resonance effect of the LPFG near the phase matching turning point(PMTP) is presented. Refractive index sensing ... A novel method for designing chalcogenide long-period fiber grating(LPFG) sensors based on the dual-peak resonance effect of the LPFG near the phase matching turning point(PMTP) is presented. Refractive index sensing in a high-refractive-index chalcogenide fiber is achieved with a coated thinly clad film. The dual-peak resonant characteristics near the PMTP and the refractive index sensing properties of the LPFG are analyzed first by the phase-matching condition of the LPFG. The effects of film parameters and cladding radius on the sensitivity of refractive index sensing are further discussed. The sensor is optimized by selecting the appropriate film parameters and cladding radius. Simulation results show that the ambient refractive index sensitivity of a dual-peak coated thinly clad chalcogenide LPFG at the PMTP can be 2400 nm/RIU, which is significantly higher than that of non-optimized gratings. It has great application potential in the field of chemical sensing and biosensors. 展开更多
关键词 chalcogenide longperiod fiber grating dual-peak resonance phase matching turning point refractive index sensor
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On-chip vectorial structured light field manipulation by inverse design 认领 引用
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作者 Zijia Wang Kunhao Lei +13 位作者 Shenglong Yang Mengxue Qi Jieren Song Yuting Ye Hui Ma Yiting Yun Qiwei Zhan Da Li Shixun Dai Baile Zhang Xiaoyong Hu Lan Li Erping Li Hongtao Lin 《Frontiers of Optoelectronics》 EI CAS CSCD 2026年第2期1-14,共14页
Structured light,with its multidimensional control over amplitude,phase,space and frequency,is a key enabler for advanced technologies such as high-capacity communications,quantum information,and super-resolution imag... Structured light,with its multidimensional control over amplitude,phase,space and frequency,is a key enabler for advanced technologies such as high-capacity communications,quantum information,and super-resolution imaging.Here,we propose a unified inverse-design methodology for arbitrary on-chip vectorial structured-light.Inspired by quantum-state representations,we describe complex vector fields as finite-dimensional vectors in a Hilbert space and introduce a transmission-matrix formalism that links input waveguide modes to target topological edge states.By combining this mapping with adjoint-based topology optimization,we obtain the permittivity distribution within a compact design window that realizes the desired vector transformation while preserving topological transport.We experimentally demonstrate two representative domain-wall configurations on a valley photonic crystal(VPC)platform,termed Type-I and Type-II topological couplers,which efficiently couple the fundamental TE0 mode into valley pseudospin edge states.Simulations of the ideally designed device show insertion losses of 0.04 dB and 0.09 dB at 1550 nm with 3-dB bandwidths of 132 nm and 65 nm,respectively.Experimentally,the fabricated device,which was designed accounting for fabrication tolerances,maintains a broadband low-loss performance,with measured losses of60 nm and<0.8 dB at 1550 nm with 3-dB bandwidth over 87 nm.Mirror-symmetric designs further validate selective excitation of orthogonal pseudospin states.Our results establish this inverse-design methodology as a powerful tool for strictly controlling on-chip vectorial light,paving the way toward compact,broadband,and multifunctional photonic integrated circuits for optical computing,communications,and beyond. 展开更多
关键词 Inverse design On-chip structured light Valley photonic crystal Chalcogenide photonics
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Unlocking body-surface physiological evolution via IR-temperature dual sensing with single chalcogenide fiber 认领 引用 被引量:2
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作者 Yanqing Fu Shiliang Kang +5 位作者 Gangjie Zhou Xinxiang Huang Linling Tan Chengwei Gao Shixun Dai Changgui Lin 《Light: Science & Applications》 SCIE EI CAS CSCD 2025年第6期1749-1758,共10页
Improvements to body-surface physiological monitoring ability including real-time,accuracy and integration,are essential to meet the expansive demands for personal healthcare.As part of this,simultaneous monitoring of... Improvements to body-surface physiological monitoring ability including real-time,accuracy and integration,are essential to meet the expansive demands for personal healthcare.As part of this,simultaneous monitoring of sweat metabolites and body temperature offers an exciting path to maximizing diagnostic precision and minimizing morbidity rates.Herein,we report a high-performance biomarker-temperature sensor made of a single As3Se5Te2chalcogenide glass fiber to monitor physiology evolution on body-surface.The sensor integrates efficient thermal resistance and fiber evanescent wave effects,permitting the independent sensing of temperature and biomarkers with an ultrahigh temperature coefficient of resistance(−5.84%K–1),rapid temperature response(0.3 s)and excellent IR sensing sensitivity.Moreover,by attaching a fiber to the wrist,we demonstrate simultaneous observation of both sweat metabolite(urea and lactate)and temperature changes during exercise.This illuminating sensing method will provide crucial capabilities in physiological monitoring and pave the way for advanced personalized diagnostic. 展开更多
关键词 monitor physiology evolution maximizing diagnostic precision body temperature ir temperature dual sensing real time sensing body surface physiological monitoring chalcogenide fiber sweat metabolites
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Humidity Sensor Based on a Hollow Core Fiber Anti-Resonant Reflection Optical Waveguide 认领 引用 被引量:1
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作者 Ao CHENG Chaoqi WANG +3 位作者 Jiadong XU Peiqing ZHANG Yu ZHENG Shixun DAI 《Photonic Sensors》 SCIE EI CSCD 2025年第2期13-23,共11页
In this paper,a graphene oxide(GO)composite film-coated humidity sensor is proposed based on the hollow core fiber(HCF).A segment of the HCF is spliced between two segments of the single-mode fiber(SMF).The relative h... In this paper,a graphene oxide(GO)composite film-coated humidity sensor is proposed based on the hollow core fiber(HCF).A segment of the HCF is spliced between two segments of the single-mode fiber(SMF).The relative humidity(RH)sensing characteristics of the sensor are experimentally investigated by observing the intensity shift of resonant dips in the transmission spectrum,which shows the GO composite film-coated HCF has the good stability in the measurement of humidity.The maximum humidity sensitivity of 0.12 dB/%RH is obtained in the RH range of 30%–78%.The proposed sensor has the advantages of the simple structure,easy fabrication,good stability,and high performance,which can be applied to marine climate detection,tunnel air humidity detection,agricultural testing,and other fields. 展开更多
关键词 Humidity sensing hollow core fiber anti-resonant refection optical waveguide graphene oxide
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Mid-infrared supercontinuum generation in chalcogenide glass fibers:a brief review 认领 引用 被引量:5
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作者 Yingying Wang Shixun Dai 《PhotoniX》 SCIE EI 2021年第1期341-363,共23页
Chalcogenide(ChG)glasses have the characteristics of a wide transparency window(over 20μm)and high optical nonlinearity(up to 103 times greater than that of silica glasses),exhibiting great advantages over silica and... Chalcogenide(ChG)glasses have the characteristics of a wide transparency window(over 20μm)and high optical nonlinearity(up to 103 times greater than that of silica glasses),exhibiting great advantages over silica and other soft glasses in optical property at mid-infrared(MIR)wavelength range.These make them excellent candidates for MIR supercontinuum(SC)generation.Over the past decades,great progress has been made in MIR SC generation based on ChG fibers in terms of spectral extension and output power improvement.In this paper,we introduce briefly the properties of ChG glasses and fibers including transmission,nonlinearity,and dispersion,etc.Recent progress in MIR SC generation based on ChG fibers is reviewed from the perspective of pump schemes.We also present novel ChG fibers such as As-free,Te-based,and chalcohalide fibers,which have been explored and employed as nonlinear fibers to achieve broadband SC generation.Moreover,the potential applications of MIR SC sources based on ChG fibers are discussed. 展开更多
关键词 Chalcogenide glass fiber Supercontinuum generation Mid-infrared Nonlinear optics
Generation of 100 nJ pulse,1 W average power at 2μm from an intermode beating mode-locked all-fiber laser 认领 引用
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作者 Jiaji Zhang Duanduan Wu +2 位作者 Ruwei Zhao Rongping Wang Shixun Dai 《High Power Laser Science and Engineering》 SCIE EI CAS CSCD 2019年第4期50-55,共6页
We report on the investigation of intermode beating mode-locked(IBML)pulse generation in a simple all-fiber Tm^3+-doped double clad fiber laser(TDFL).This IBML TDFL is implemented by matching longitudinal-mode frequen... We report on the investigation of intermode beating mode-locked(IBML)pulse generation in a simple all-fiber Tm^3+-doped double clad fiber laser(TDFL).This IBML TDFL is implemented by matching longitudinal-mode frequency between 793 nm laser and TDFL without extra mode locker.The central wavelength of 1983 nm,the fundamental pulse frequency of 9.6 MHz and the signal-to-noise ratio(SNR)of>50 dB are achieved in this IBML TDFL.With laser cavity optimization,the IBML TDFL can finally generate an average output power of 1.03 W with corresponding pulse energy of 107 nJ.These results can provide an easily accessible way to develop compact large-energy,highpower TDFLs. 展开更多
关键词 average output power intermode beating mode-locking Tm^3+-doped double clad fiber laser pulse energy
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Experimental demonstration of a flexible-grid 1×(2×3)mode-and wavelength-selective switch using silicon microring resonators and counter-tapered couplers 认领 引用 被引量:1
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作者 孔德军 鲁昊 +9 位作者 汪鹏君 符强 戴世勋 陈伟伟 王栎沣 张波豪 马凌霄 李军 戴庭舸 杨建义 《Chinese Optics Letters》 SCIE EI CAS CSCD 2024年第1期52-58,共7页
A flexible-grid 1×(2×3)mode-and wavelength-selective switch which comprises counter-tapered couplers and silicon microring resonators has been proposed,optimized,and demonstrated experimentally in this work.... A flexible-grid 1×(2×3)mode-and wavelength-selective switch which comprises counter-tapered couplers and silicon microring resonators has been proposed,optimized,and demonstrated experimentally in this work.By carefully thermally tuning phase shifters and silicon microring resonators,mode and wavelength signals can be independently and flexibly conveyed to any one of the output ports,and different bandwidths can be generated as desired.The particle swarm optimization algorithm and finite difference time-domain method are employed to optimize structural parameters of the twomode(de)multiplexer and crossing waveguide.The bandwidth-tunable wavelength-selective optical router composed of12 microring resonators is studied by taking advantage of the transfer matrix method.Measurement results show that,for the fabricated module,cross talk less than-10.18 dB,an extinction ratio larger than 17.41 d B,an in-band ripple lower than0.79 dB,and a 3-dB bandwidth changing from 0.38 to 1.05 nm are obtained,as the wavelength-channel spacing is 0.40 nm.The corresponding response time is measured to be 13.64μs. 展开更多
关键词 integrated optics optical waveguide mode-and wavelength-selective switch
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Ultra-compact and broadband polarization-insensitive mode-order converting power splitter 认领 引用 被引量:1
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作者 陈浩琪 姚润葵 +9 位作者 汪鹏君 符强 陈伟伟 戴世勋 孔德军 林健 金涛 李军 戴庭舸 杨建义 《Chinese Optics Letters》 SCIE EI CAS CSCD 2024年第3期36-41,共6页
A polarization-insensitive mode-order converting power splitter using a pixelated region is presented and investigated in this paper.As TE0and TM0modes are injected into the input port,they are converted into TE... A polarization-insensitive mode-order converting power splitter using a pixelated region is presented and investigated in this paper.As TE0and TM0modes are injected into the input port,they are converted into TE1and TM1modes,which evenly come out from the two output ports.The finite-difference time-domain method and direct-binary-search optimization algorithm are utilized to optimize structural parameters of the pixelated region to attain small insertion loss,low crosstalk,wide bandwidth,excellent power uniformity,polarization-insensitive property,and compact size.Experimental results reveal that the insertion loss,crosstalk,and power uniformity of the fabricated device at 1550 nm are 0.57,-19.67,and 0.094 d B in the case of TE polarization,while in the TM polarization,the relevant insertion loss,crosstalk,and power uniformity are 0.57,-19.40,and 0.11 d B.Within a wavelength range from 1520 to 1600 nm,for the fabricated device working at TE polarization,the insertion loss,crosstalk,and power uniformity are lower than 1.39,-17.64,and 0.14 dB.In the case of TM polarization,we achieved an insertion loss,crosstalk,and power uniformity less than 1.23,-17.62,and 0.14 dB. 展开更多
关键词 integrated optics optical waveguide polarization-insensitive property mode-order converting power splitter
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