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A 515-nm laser-pumped idler-resonant femtosecond BiB_(3)O_(6) optical parametric oscillator

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Chinese Physics B 2022年第1期31卷 339-343页

作者： Jinfang Yang Zhaohua Wang Jiajun Song Renchong Lv Xianzhi Wang Jiangfeng Zhu Zhiyi Wei School of Physics and Optoelectronic Engineering Xidian UniversityXi'an 710071China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China University of Chinese Academy of sciences(cas) Beijing 100049China Songshan Lake Materials Laboratory Dongguan 523808China cas center for excellence in ultra-intense laser science Shanghai 201800China

We report on an idler-resonant femtosecond optical parametrical oscillator(OPO)based on BiB_(3)O_(6)(BiBO)crystal,synchronously pumped by a frequency-doubled,mode-locked Yb:KGW laser at 515 *** idler wavelengths of OPO can be tuned from 1100 nm to 1540 *** a repetition rate of 75.5 MHz,the OPO generates as much as 400 mW of idler power with 3.1 W of pump power,the corresponding pulse duration is 80 fs,which is 1.04 times of Fourier transform-limited(FTL)pulse duration at 1305 *** addition,the OPO exhibits excellent beam quality with M^(2)<1.8 at 1150 *** the best of our knowledge,this is the first idler-resonant femtosecond OPO pumped by 515 nm.

关键词： nonlinear frequency conversion 515-nm laser pumped femtosecond optical parametric oscillator BiB_(3)O_(6)nonlinear crystal

Self-organized phase-transition lithography for all-inorganic photonic textures

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Light(science & Applications) 2021年第6期10卷 1020-1028页

作者： Bo Zhang Dezhi Tan Zhuo Wang Xiaofeng Liu Beibei Xu Min Gu Limin Tong Jianrong Qiu State Key Laboratory of Modern Optical Instrumentation College of Optical Science and EngineeringZhejiang University310027 HangzhouChina School of Materials science and Engineering Zhejiang University310027 HangzhouChina. Centre for Artificial-lntelligenee Nano photonics School of Optical Science and EngineeringShanghai University of Science and Technology200093 ShanghaiChina. cas center for excellence in ultra-intense laser science Chinese Academy of Sciences201800 ShanghaiChina

Realizing general processing applicable to various materials by one basic tool has long been considered a distant ***,ultrafast laser-matter interaction has emerged as a highly universal platform with unprecedented optical phenomena and provided implementation paths for advanced manufacturing with novel ***,we report the establishment of a three-dimensional(3D)focal-area interference field actively induced by a single ultrafast laser in transparent *** on this,we demonstrate a radically new approach of self-organized phase-transition lithography(SOPTL)to achieve super-resolution construction of embedded all-inorganic photonic textures with extremely high *** generated textures exhibit a tunable photonic bandgap(PBG)in a wide range from〜1.3 to〜2 *** complicated interlaced textures with adjustable structural features can be fabricated within a few seconds,which is not attainable with any other conventional *** suggests that the SOPTL is extendable to more than one material *** study augments light-matter interaction physics,offers a promising approach for constructing robust photonic devices,and opens up a new research direction in advaneed lithography.

关键词： lithography transition phase

Photonic circuits written by femtosecond laser in glass:improved fabrication and recent progress in photonic devices

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Advanced Photonics 2021年第2期3卷 15-37页

作者： Dezhi Tan Zhuo Wang Beibei Xu Jianrong Qiu Zhejiang University College of Optical Science and EngineeringState Key Laboratory of Modern Optical InstrumentationHangzhouChina Chinese Academy of sciences CAS Center for Excellence in Ultra-Intense Laser ScienceShanghaiChina

Integrated photonics is attracting considerable attention and has found many applications in both classical and quantum optics,fulfilling the requirements for the ever-growing complexity in modern optical experiments and big data ***(fs)laser direct writing(FLDW)is an acknowledged technique for producing waveguides(WGs)in transparent glass that have been used to construct complex integrated photonic *** possesses unique features,such as three-dimensional fabrication geometry,rapid prototyping,and single step fabrication,which are important for integrated communication devices and quantum photonic and astrophotonic *** fully take advantage of FLDW,considerable efforts have been made to produce WGs over a large depth with low propagation loss,coupling loss,bend loss,and highly symmetrical mode *** summarize the improved techniques as well as the mechanisms for writing high-performance WGs with controllable morphology of cross-section,highly symmetrical mode field,low loss,and high processing uniformity and efficiency,and discuss the recent progress of WGs in photonic integrated devices for communication,topological physics,quantum information processing,and *** challenges and future research directions in this field are also pointed out.

关键词： photonic integrated circuit waveguides femtosecond laser direct writing improved techniques photonic devices

Measurement of electron beam transverse slice emittance using a focused beamline

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高功率激光科学与工程:英文版 2023年第3期11卷 41-47页

作者： Kangnan Jiang Ke Feng Hao Wang Xiaojun Yang Peile Bai Yi Xu Yuxin Leng Wentao Wang Ruxin Li State Key Laboratory of High Field laser Physics and cas center for excellence in ultra-intense laser science Shanghai Institute of Optics and Fine Mechanics(SIOM)Chinese Academy of Sciences(CAS)ShanghaiChina School of Physical science and Technology ShanghaiTech UniversityShanghaiChina

A single-shot measurement of electron emittance was experimentally accomplished using a focused transfer line with a *** betatron phase of electrons based on laser wakefield acceleration(LWFA)is energy dependent owing to the coupling of the longitudinal acceleration field and the transverse focusing(defocusing)field in the *** phase space presents slice information after phase compensation relative to the center *** the transverse size of the electron beam at different energy slices in the energy spectrum measured 0.27 mm mrad in the *** diagnosis of slice emittance facilitates local electron quality manipulation,which is important for the development of LWFA-based free electron *** quasi-3D particle-in-cell simulations matched the experimental results and analysis well.

关键词： beam diagnostic emittance laser wakefield acceleration

ultra-broadband pulse generation via hollow-core fiber compression and frequency doubling for ultra-intense lasers

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High Power laser science and Engineering 2023年第1期11卷 38-43页

作者： Yanyan Li Beijie Shao Yujie Peng Junyu Qian Wenkai Li Xinliang Wang Xingyan Liu Xiaoming Lu Yi Xu Yuxin Leng Ruxin Li State Key Laboratory of High Field laser Physics and cas center for excellence in ultra-intense laser science Shanghai Institute of Optics and Fine Mechanics(SIOM)Chinese Academy of Sciences(CAS)ShanghaiChina center of Materials science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijingChina

We demonstrate an ultra-broadband high temporal contrast infrared laser source based on cascaded optical parametric amplification,hollow-core fiber(HCF)and second harmonic generation *** this setup,the spectrum of an approximately 1.8μm laser pulse has near 1μm full bandwidth by employing an argon gas-filled ***,after frequency doubling with cascaded crystals and dispersion compensation by a fused silica wedge pair,9.6 fs(~3cycles)and 150μJ pulses centered at 910 nm with full bandwidth of over 300 nm can be *** energy stability of the output laser pulse is excellent with 0.8%(root mean square)over 20 min,and the temporal contrast is>10^(12)at-10 ps before the main *** excellent temporal and spatial characteristics and stability make this laser able to be used as a good seed source for ultra-intense and ultrafast laser systems.

关键词： few-cycle laser high temporal contrast ultra-broadband ultrafast laser

Nonlinear optical properties of CsPbCl_(x)Br_(3-x)nanocrystals embedded glass

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Photonics Research 2021年第9期9卷 1767-1774页

作者： CHENJING QUAN XIAO XING SIHAO HUANG MENGFEIFEI JIN TONGCHAO SHI ZEYU ZHANG WEIDONG XIANG ZHANSHAN WANG YUXIN LENG School of Physics science and Engineering Tongji UniversityShanghai 200092China State Key Laboratory of High Field laser Physics and cas center for excellence in ultra-intense laser science Shanghai Institute of Optics and Fine Mechanics(SIOM)Chinese Academy of Sciences(CAS)Shanghai 201800China College of Chemistry and Materials Engineering Wenzhou UniversityWenzhou 325035China Hangzhou Institute for Advanced Study University of Chinese Academy of SciencesHangzhou 310024China School of Physics and Electronics Shandong Normal UniversityJinan 250014China

All-inorganic perovskite has attracted significant attention due to its excellent nonlinear optical *** and low-toxic perovskite materials have great application prospects in optoelectronic ***,we study the nonlinear optical properties of CsPbCl_(x)Br_(3-x)(x=1,1.5,2)nanocrystals(NCs)glass by open-aperture *** is found that the two-(2 PA)and three-photon absorption(3 PA)intensity can be adjusted by the treatment temperature and the ratio of halide *** perovskite NCs glass treated at a high temperature has better crystallinity,resulting in stronger nonlinear absorption *** addition,the value of the 2 PA parameter of CsPbCl_(1.5)Br_(1.5)NCs glasses decreases when the incident pump intensity increases,which is ascribed to the saturation of 2 PA and population ***,the research results show that the 2 PA coefficient(0.127 cm GW-1)and 3 PA coefficient(1.21×10^(-5)cm^(3)GW-2)of CsPbCl_(1)Br_(2)NCs glass with high Br anion content are larger than those of CsPbCl_(2)Br_(1)and CsPbCl_(1.5)Br_(1.5)NCs *** is mainly due to the greater influence of Br anions on the symmetry of the perovskite structure,which leads to the redistribution of delocalized *** revealed adjustable nonlinear optical properties of perovskite NCs glass are essential for developing stable and high-performance nonlinear optical devices.

关键词： glass perovskite glasses

Electro-Optically Switchable Optical True Delay Lines of Meter-Scale Lengths Fabricated on Lithium Niobate on Insulator Using Photolithography Assisted Chemo-Mechanical Etching

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Chinese Physics Letters 2020年第8期37卷 43-47页

作者： Jun-xia Zhou Ren-hong Gao Jintian Lin Min Wang Wei Chu Wen-bo Li Di-feng Yin Li Deng Zhi-wei Fang Jian-hao Zhang Rong-bo Wu and Ya Cheng State Key Laboratory of Precision Spectroscopy East China Normal UniversityShanghai 200062China XXL-The Extreme Optoelectromechanics Laboratory School of Physics and Electronics ScienceEast China Normal UniversityShanghai 200241China State Key Laboratory of High Field laser Physics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China University of Chinese Academy of sciences Beijing 100049China collaborate cas center for excellence in ultra-intense laser science Shanghai 201800China Innovation center of Extreme Optics Shanxi UniversityTaiyuan 030006China Shanghai Research center for Quantum sciences Shanghai 201315China

Optical true delay lines(OTDLs)of low propagation losses,small footprints and high tuning speeds and efficiencies are of critical importance for various photonic ***,we report fabrication of electro-optically switchable OTDLs on lithium niobate on insulator using photolithography assisted chemo-mechanical *** device consists of several low-loss optical waveguides of different lengths which are consecutively connected by electro-optical switches to generate different amounts of time *** fabricated OTLDs show an ultra-low propagation loss of^0.03dB/cm for waveguide lengths well above 100 cm.

关键词： lithography waveguide tuning

Response of HD-V2 radiochromic film to argon ions

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Chinese Physics B 2021年第8期30卷 282-286页

作者： Lei Cheng Zhe Zhang Guiyun Liang Yutong Li Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of Sciences(CAS)Beijing 100190China School of Physical sciences University of Chinese Academy of SciencesBeijing 100049China Key Laboratory of Optical Astronomy National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100012China Songshan Lake Materials Laboratory Dongguan 523808China cas center for excellence in ultra-intense laser science Shanghai 201800China

A two-dimensional dose detector for ion beam is required in many high energy density physics *** a solid detector,the GAFChromic film offers a good spatial resolution and dosimetric *** an absolute dose measurement,the relative effectiveness,which represents the darkening efficiency of the film to a radiation source,needs to be taken into *** this contribution,the dose-response of HD-V2 to argon ions is presented for the first *** calibration was taken over the dose range of 65 Gy-660 Gy with 8-keV argon *** response of net optical density is from 0.01 to ***-color dose-response functions are *** relative effectiveness for the argon ion beams is about 5%,much lower than that of protons and carbon *** explain this effect,the inactivation probability based on track theory of ion bombardment is ***,a theoretical prediction of the relative effectiveness for single ion is presented,showing the dependence of the darkening efficiency on the atomic number and the incident energy of ions.

关键词： radiochromic film dosimetry ion bombardment relative effectiveness

Hydrothermal synthesis of two-dimensional MoS_(2)and its applications

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Tungsten 2019年第1期1卷 59-79页

作者： Xiaoyan Zhang Guoqing Ma Jun Wang Laboratory of Micro-Nano Optoelectronic Materials and Devices Key Laboratory of Materials for High-Power LaserShanghai Institute of Optics and Fine Mechanics(SIOM)Chinese Academy of Sciences(CAS)Shanghai 201800China center of Materials science and Optoelectronic Engineering University of Chinese Academy of SciencesBeijing 100049China State Key Laboratory of High Field laser Physics Shanghai Institute of Optics and Fine Mechanics(SIOM)Chinese Academy of Sciences(CAS)Shanghai 201800China cas center for excellence in ultra-intense laser science(CEULS) Shanghai 201800China

Two-dimensional(2D)transition metal dichalcogenides(TMDs)have attracted tremendous attention because of their unique electronic,optical and chemical properties.2D TMDs,especially 2D MoS2,have been proved to show great potential in vari-ous applications such as sensing,hydrogen evolution and lithium ion ***,methods for the scalable preparation of 2D materials and 2D nanocomposites of high quality and low cost must be *** the various synthesis meth-ods,the hydrothermal synthesis method is simple and can meet the above *** this review,the recent advances in the controllable hydrothermal synthesis of 2D MoS_(2)and its nanocomposites by the hydrothermal synthesis method are *** provide insight into the growth mechanisms of few-layered 2D MoS_(2)with different morphologies and the key technologies to realize wafer-scale growth of continuous and homogeneous 2D films which are important for practical ***,the typical applications of TMDs in nonlinear optics as ultrafast optical modulation devices are pre-sented based on work of our *** more clarity,we summarize the current challenges of the hydrothermal synthesis method encountering,and suggest solutions to these challenges concerning future developments in practical applications.

关键词： Hydrothermal synthesis Transition metal dichalcogenides MoS_(2) Two dimension Nonlinear optics