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Design of large mode area all-solid anti-resonant fiber for high-power lasers

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High Power Laser Science and Engineering 2021年第2期9卷 161-167页

作者： Xin Zhang Shoufei Gao Yingying Wang Wei Ding Pu Wang National Center of Laser Technology Institute of Laser EngineeringBeijing University of TechnologyBeijing 100124China Institute of Photonics Technology Jinan UniversityGuangzhou 510632China

High-power fiber lasers have experienced a dramatic development over the last *** increasing the output power needs an upscaling of the fiber mode area,while maintaining a single-mode ***,we propose an all-solid anti-resonant fiber(ARF)structure,which ensures single-mode operation in broadband by resonantly coupling higherorder modes into the cladding.A series of fibers with core sizes ranging from 40 to 100µm are proposed exhibiting maximum mode area exceeding 5000µ*** simulations show this resonant coupling scheme provides a higher-order mode(mainly TE01,TM01,and HE21)suppression ratio of more than 20 dB,while keeping the fundamental mode loss lower than 1 dB/*** proposed structure also exhibits high tolerance for core index depression.

关键词： fiber design laser amplifiers modeling and optimization optical devices optical materials

Spectral technique for measuring phase retardation of a wave plate

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Chinese Optics Letters 2015年第1期13卷 82-87页

作者：王伟陈建中刘中波 Shandong Jiaotong University College of ScienceChangqing University Science & Technology Park

We present a technique and algorithm for measuring the phase retardation of a wave plate based on spectral transmission curve. Through accurately extracting the intersection points＇ wavelengths from the spectral transmission curve, the effective phase retardation, absolute phase retardation, order, and physical thickness of the wave plate can be measured simultaneously in a wide spectral range. Experimental results show that the proposed technique has many advantages, such as higher data utilization, simpler extraction algorithm, and no strict requirement for the directions of transmission axes of the polarizer and analyzer, and the fast axis of the wave plate.

关键词： Algorithms optical devices

Silk: a versatile biomaterial for advanced optics and photonics [Invited]

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Chinese Optics Letters 2020年第8期18卷 10-21页

作者： Yushu Wang Meng Li Yu Wang Department of Biomedical Engineering Tufts UniversityMedfordMA 02155USA

The growing demand of sustainable and biocompatible optical devices is stimulating the development of naturally derived biomaterials for optics and photonics. As a versatile biomaterial, silk provides excellent material characteristics that are favorable towards the generation of advanced optical systems. This review examines the use of silk as a material platform in optical applications. Recent advances in silk-based optical devices and multifunctional devices are summarized. The challenges and directions in further designing and fabricating silk optics are also discussed. We envision that silk will play a pivotal role in the future exploitation of sustainable, intelligent, wearable/implantable, and multifunctional optical devices.

关键词： silk biomaterials optical devices multifunctional devices

Electro-optically Q-switched 946 nm laser of a composite Nd:YAG crystal

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Chinese Optics Letters 2015年第2期13卷 49-52页

作者：黄晶胡秀寒陈卫标 Key Laboratory of Space Laser Communication and Detection Technology Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences

A depolarization phenomenon in an electro-optical crystal in a quasi-three-level 946 nm Nd：YAG laser is observed. A compensation of the thermal effects in electro-optical crystals is achieved by employing a quarter-wave plate, with one optical axis parallel to the laser polarization. This technique allows for the production of an electro-optically Q-switched 946 nm Nd：YAG laser at 1 k Hz. A maximum output power of 350 m W at 1 k Hz repetition frequency and 11 ns pulse duration are achieved with an output coupler of 10% transmission under the incident pump power of 11.1 W, corresponding to a peak power of ～32 k W.

关键词： Light polarization optical devices optical pumping Q switching

Generation of polarization vortex beams by segmented quarter-wave plates

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Chinese Optics Letters 2016年第7期14卷 19-22页

作者：辛璟焘娄小平周哲海董明利祝连庆 Beijing Engineering Research Center of Optoelectronie Information and Instruments Beijing Information Science and Technology University Beijing 100192 China Beijing Key Laboratory of Optoelectronic Measurement Technology Beijing Information Science and Technology University Beijing 100192 China

A spatially variable retardation device, an SQWP, is designed to generate polarization vortex beams. The transformation of Laguerre--Gaussian beams by the SQWP is further studied, and it is found that the SQWPs can al... 详细信息

关键词： optical devices Polarization Vortex flow

Research on 3D FBG accelerometer and demodulation method

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Chinese Optics Letters 2014年第A1期12卷 149-153页

作者：南秋明宋蕾 National Engineering Laboratory for Fiber Optic Sensing Technology Wuhan University of Technology Wuhan 430070 China Key Laboratory of Fiber Optic Sensing Technology and Information Processing Ministry of Education Wuhan University of Technology Wuhan 430070 China School of Electronic and Information Engineering LiaoNing University of Science and Technology Anshan 114021 China

In order to meet the requirements of vibration monitoring of large mechanical equipment, the authors design a novel three-dimensional （3D） high-frequency fiber Bragg grating （FBG） accelerometer. First, the operation principle of the sensor is introduced; the theoretical calculation and finite element analysis are performed about its structural parameters in this paper. Second, an FBG demodulation method for vibration signal is studied and a compensation method is put forward to measure the error caused by fluctuation of the light source and line loss. Finally, sensing properties such as amplitude frequency characteristics, sensitivity of the sensor, crosstalk coefficient, space acceleration measurement are tested, and the compensation method for measurement error is validated. The results show that the operating frequency bandwidth of the transducer is 10500 Hz, sensitivity is about 1400 my/g, crosstalk coefficient is larger than 20.6 dB, and the maximum measurement error of space acceleration is 4.8%, the compensation error is less than 5%. Hence, the sensor is used to monitor the vibration state of mechanical equipment.

关键词： 230.0230 optical devices 250.0250 Optoelectronics 260.0260 Physical optics

Sensitivity improvement of broadband electro-optic polymer-based optical phase modulator using 1D and 2D photonic crystal structures

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Chinese Optics Letters 2017年第1期15卷 8-12页

作者： K.Receveur K.Wei M.Hadjloum M.El Gibari A.De Rossi H.W.Li A.S.Daryoush Department of ECE Drexel University IETR Université Bretagne Loire University of Nantes Thales Research and Technology France

This Letter introduces the design and simulation of a microstrip-line-based electro-optic （EO） polymer optical phase modulator （PM） that is further enhanced by the addition of photonic crystal （PhC） structures that are in close proximity to the optical core. The slow-wave PhC structure is designed for two different material configurations and placed in the modulator as a superstrate to the optical core; simulation results are depicted for both 1D and 2D PhC structures. The PM characteristics are modeled using a combination of the finite element method and the optical beam propagation method in both the RF and optical domains, respectively. The phase-shift simulation results show a factor of 1.7 increase in an effective EO coefficient （120 pm/V） while maintaining a broadband bandwidth of 40 GHz.

关键词： Integrated optics Optoelectronics Photonic crystal waveguides Modulators Polymer waveguides Nanomaterials Electro-optical materials optical devices Optoelectronics

3D printing of glass by additive manufacturing techniques:a review

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Frontiers of Optoelectronics 2021年第3期14卷 263-277页

作者： Dao ZHANG Xiaofeng LIU Jianrong QIU State Key Laboratory of Modem optical Instrumentation and School of optical Science and Engineering Zhejiang UniversityHangzhou 310027China School of Materials Science and Engineering Zhejiang UniversityHangzhou 310027China Huazhong University of Science and Technology Wuhan National Laboratory for OptoelectronicsWuhan 430074China

Additive manufacturing(AM),which is also known as three-dimensional(3D)printing,uses computer-aided design to build objects layer by ***,we focus on the recent progress in the development of techniques for 3D printing of glass,an important optoelectronic material,including fused deposition modeling,selective laser sintering/melting,stereolithography(SLA)and direct ink *** compare these 3D printing methods and analyze their benefits and problems for the manufacturing of functional glass *** addition,we discuss the technological principles of 3D glass printing and applications of 3D printed glass *** review is finalized by a summary of the current achievements and perspectives for the future development of the 3D glass printing technique.

关键词： three-dimensional(3D)printing glass fused deposition modeling(FDM) selective laser sintering/melting(SLS/SLM) stereolithography(SLA) digital light processing(DLP) direct ink write(DIW) optical devices microfluidic

Multifunctional integration on optical fiber tips: challenges and opportunities

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Advanced Photonics 2020年第6期2卷 23-46页

作者： Yifeng Xiong Fei Xu Nanjing University College of Engineering and Applied SciencesNanjingChina

.The flat endface of an optical fiber tip is an emerging light-coupled microscopic platform that combines fiber optics with planar micro-and *** different materials and structures are integrated onto the endfaces,optical fiber tip devices have miniature sizes,diverse integrated functions,and low insertion losses,making them suitable for all-optical *** recent decades,the increasing demand for multifunctional optical fibers has created opportunities to develop various structures on fiber ***,the unconventional shape of optical fibers presents challenges involving the adaptation of standard planar micro-and nanostructure preparation strategies for fiber *** this context,researchers are committed to exploring and optimizing fiber tip manufacturing techniques,thereby paving the way for future integrated all-fiber devices with multifunctional ***,we present a broad overview of current fabrication technologies,classified as“top-down,”“bottom-up,”and“material transfer”methods,for patterning optical fiber ***,we review typical structures integrated on fiber tips and their known and potential applications,categorized with respect to functional structure configurations,including“optical functionalization”and“electrical integration.”Finally,we discuss the prospects for future opportunities involving multifunctional integrated fiber tips.

关键词： optical fibers fiber tips optical devices nanotechnology micro-optics nano-optics.