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Influence of Nd^(3+) concentration on mid-infrared emission in PbF_(2) crystal co-doped with Ho^(3+) and Nd^(3+) ions

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Journal of Rare Earths 2024年第3期42卷 479-487,I0002页

作者： Yan Chen Juncheng Tan Peixiong Zhang Weibi Zheng Lin Li Lianhan Zhang Zhen Li Yin Hang Zhenqiang Chen Department of Optoelectronic Engineering Jinan UniversityGuangzhou510632China Guangdong Provincial Engineering Research Centerof Crystal and Laser Technology.Guangzhou 510632China Research Center of Laser Crystal Key Laboratory of High Power Laser MaterialsShanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai201800China

A promising series of Ho_(y)Nd_(x)Pb_((1-x-y))F_2(x = 0, 0.01, 0.02, 0.03, 0.04;y = 0.02) crystals was grown by the Bridgman method. The influence of the Nd^(3+)ions concentration on mid-infrared(~2.0, ~2.9 and ~3.9 μm)fluorescence emissions of Ho^(3+)ions in the PbF_(2) crystal excited by 808 nm laser diode was investigated in this work. The energy transfer mechanism between Nd^(3+)ions and Ho~(3+)ions under different concentrations of the Nd^(3+)ions was systematically analyzed. The results show that the Nd^(3+)ions have good sensitization and deactivation effect on the Ho^(3+)ions to stimulate the mid-infrared fluorescence emissions. The experimental analysis proves that the sensitization efficiency of the Nd^(3+)ions is relatively stable at around 93.45% with varying Nd^(3+)-doping concentrations. Concentration dependence studies indicate that the concentration of the Nd^(3+)ions has significant influence on mid-infrared emissions.When the doping concentration of the Nd^(3+)ions is up to 2.0 at%, the intensity of ~2.0, ~2.9 and ~3.9 μm emissions all reach the maximum. The output characteristics of a 3.9 μm laser are simulated, and it is found that with the increase of the Nd^(3+)-doping concentration, the peak power, pulse width, and peak energy all meet the trend of first increasing and then decreasing, and Ho_(0.02)Nd_(0.02)Pb_(0.96)F_(2) crystal displays the best performance. All the results show that the Nd^(3+)/Ho^(3+)co-doped PbF_(2) crystals might act as a useful optical medium for mid-infrared laser applications.

关键词： Crystal growth mid-infrared PbF_(2) Rare earth ions

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Linearly Polarized Polarization-Maintaining Er^(3+)-Doped Fluoride Fiber Laser in the mid-infrared

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Journal of Electronic Science and Technology 2022年第1期20卷 1-8页

作者： Hong-Yu Luo Yong-Zhi Wang State Key Laboratory of Electronic Thin Films and Integrated Devices School of Optoelectronic Science and EngineeringUniversity of Electronic Science and Technology of ChinaChengdu 610054

We demonstrated the~2.8-μm and~3.5-μm linearly polarized continuous wave(CW)laser outputs from a polarization-maintaining(PM)Er^(3+)-doped fluoride fiber laser.By introducing a film polarizer into the cavity to select the laser polarization orientation,the~2.8-μm linearly polarized CW laser with a high polarization extinction ratio(PER)of~23 dB and maximum output power of 2.37 W was achieved under double-end pumping at 976 nm.By adding another 1981-nm pump source simultaneously,the~3.5-μm linearly polarized CW laser was also obtained,giving higher PER of~27 dB and maximum output power of 307 mW which is only limited by the available power of 1981-nm pump.To the best of our knowledge,this is the first report on a mid-infrared linearly polarized CW PM fiber laser in the>2.5-μm mid-infrared region.This work not only opens up opportunities for some new mid-infrared applications,but also provides a promising platform for developing high-stability and versatile mid-infrared laser sources.

关键词： Fiber laser linearly polarized mid-infrared polarization-maintaining(PM)

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mid-infrared optical frequency comb in the 2.7-4.0μm range via difference frequency generation from a compact laser system

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High Power Laser Science and Engineering 2020年第4期8卷 17-22页

作者： Lian Zhou Yang Liu Gehui Xie Chenglin Gu Zejiang Deng Zhiwei Zhu Cheng Ouyang Zhong Zuo Daping Luo Bin Wu Kunfeng Chen Wenxue Li Slate Key Laboratory of Precision Spectroscopy East China Normal UniversityShanghai 200062China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China Science and Technology on Electronic Test&Measurement Laboratory The 41st Research Institute ofCETCQingdao 266000China

We report on the generation of a mid-infrared(mid-IR)frequency comb with a maximum average output power of250 mW and tunability in the 2.7-4.0μm region.The approach is based on a single-stage difference frequency generation(DFG)starting from a compact Yb-doped fiber laser system.The repetition rate of the near-infrared(NIR)comb is locked at 75 MHz.The phase noise of the repetition rate in the offset-free mid-IR comb system is measured and analyzed.Except for the intrinsic of NIR comb,environmental noise at low frequency and quantum noise at high frequency from the amplifier chain and nonlinear spectral broadening are the main noise sources of broadening the linewidth of comb teeth,which limits the precision of mid-IR dual-comb spectroscopy.

关键词： fiber laser mid-infrared optical frequency comb

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High-power mid-infrared femtosecond master oscillator power amplifier Er:ZBLAN fiber laser system

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High Power Laser Science and Engineering 2023年第4期11卷 85-90页

作者： Linpeng Yu Jinhui Liang Qinghui Zeng Jiacheng Wang Xing Luo Jinzhang Wang Peiguang Yan Fanlong Dong Xing Liu Qitao Lü Chunyu Guo Shuangchen Ruan Shenzhen Key Laboratory of Laser Engineering Guangdong Provincial Key Laboratory of Micro/Nano Optomechatronics EngineeringKey Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceState Key Laboratory of Radio Frequency Heterogeneous IntegrationCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhenChina Key Laboratory of Advanced Optical Precision Manufacturing Technology of Guangdong Higher Education Institutes Shenzhen Technology UniversityShenzhenChina Han’s Laser Technology Industry Group Co. Ltd.ShenzhenChina

High-power femtosecond mid-infrared(MIR)lasers are of vast importance to both fundamental research and applications.We report a high-power femtosecond master oscillator power amplifier laser system consisting of a singlemode Er:ZBLAN fiber mode-locked oscillator and pre-amplifier followed by a large-mode-area Er:ZBLAN fiber main amplifier.The main amplifier is actively cooled and bidirectionally pumped at 976 nm,generating a slope efficiency of 26.9%.Pulses of 8.12 W,148 fs at 2.8μm with a repetition rate of 69.65 MHz are achieved.To the best of our knowledge,this is the highest average power ever achieved from a femtosecond MIR laser source.Such a compact ultrafast laser system is promising for a wide range of applications,such as medical surgery and material processing.

关键词： femtosecond fiber laser fluoride fiber amplifier master oscillator power amplifier mid-infrared

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A novel 2-μm pulsed fiber laser based on a supercontinuum source and its application to mid-infrared supercontinuum generation

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Chinese Physics B 2014年第5期23卷 311-315页

作者：杨未强张斌侯静殷科刘泽金 College of Optoelectronic Science and Engineering National University of Defense Technology

A new method to achieve 2-μm pulsed fiber lasers based on a supercontinuum （SC） is demonstrated. The incident pump light is a pulsed SC which contains a pump light and a signal light at the same time. The initial signal of the seed laser is provided by the incident pump light and amplified in the cavity. Based on this, we obtain a 2-μm pulsed laser with pulse repetition rate of 50 kHz and pulse width of 2 ns from the Tm-doped fiber laser. This 2-μm pulsed laser is amplified by two stages of fiber amplifiers, then the amplified laser is used for mid-infrared （mid-IR） SC generation in a 10-m length of ZrF4-BaF2-LaF3-AIF3-NaF （ZBLAN） fiber. An all-fiber-integrated mid-IR SC with spectrum ranging from 1.8 ~tm to 4.3 μm is achieved. The maximal average output power of the mid-IR SC from the ZBLAN fiber is 1.24 W （average output power beyond 2.5 μm is 340 mW）, corresponding to an output efficiency of 6.6% with respect to the 790-nm pump power.

关键词： fiber laser supercontinuum mid-infrared ZBLAN fiber

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1-W,high-repetition-rate room temperature operation of mid-infrared optical parametric oscillator based on periodically poled MgO-doped LiNbO

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Chinese Physics B 2008年第2期17卷 633-636页

作者：张铁犁张百钢徐德刚王鹏纪峰姚建铨 Institute of Laser and Opto-electronics College of Precision Instrument and Opto-Electronics EngineeringTianjin University Cooperated Institute of Nankai University and Tianjin University Key Laboratory of Opto-electric Information Science and Technology(Ministry of Education) Tianjin University

In this paper a high-repetition-rate mid-infrared （mid-IR） optical parametric oscillator based on periodically poled MgO-doped LiNbO3 （PPMgLN） at room temperature was demonstrated. The maximum average mid-IR output power at 3.63μm was 1.02 W with the repetition rate of 60kHz and corresponding efficiency from the pump to the idler was 26.7%. The temperature tuning and the period tuning characteristics were also discussed.

关键词： optical parametric oscillator mid-infrared periodically poled MgO-doped LiNbO3 room temperature

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Continuous-wave mid-infrared intracavity singly resonant optical parametric oscillator based on periodically poled lithium niobate

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Chinese Physics B 2008年第1期17卷 211-216页

作者：丁欣张少敏马洪梅庞明姚建铨李卓 College of Precision Instrument and Opto-Electronics Engineering Institute of Laser and Opto-Electronics Tianjin University Key Laboratory of Opto-Electronics Information Science and Technology Ministry of Education Cooperated Institute of Nankai University and Tianjin University School of Information Science and Technology Department of Opto-Electronic EngineeringBeijing Institute of Technology

This paper reports a continuous-wave （CW） mid-infrared intracavity singly resonant optical parametric oscillator based on periodically poled lithium niobate （PPLN） pumped by a diode-end-pumped CW Nd：YVO4 laser. Considering the thermal lens effects, it adopted an optical ballast lens and the near-concentric cavity for better operation. At the PPLN＇s grating period of 28.5 μm and the temperature of 140℃, the maximum idler output power of 155 mW at 3.86 μm has been achieved when the 808 nm pump power is 8.5 W, leading to an optical-to-optical conversion efficiency of 1.82%.

关键词： continuous-wave mid-infrared intracavity optical parametric oscillator periodically poled lithium niobate crystal

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Carrier-envelope phase effects on high-harmonic generation driven by mid-infrared laser field

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Chinese Physics B 2014年第10期23卷 168-174页

作者：刁寒虎郑颖辉钟悦曾志男葛晓春李闯李儒新徐至展 Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences

The influence of the carrier-envelope phase on high-harmonic generation is investigated, both experimentally and theoretically, for three different interaction gas media, driven by mid-infrared, few-cycle and CEP-stabiUzed laser pulses. Different patterns of harmonic spectra with varying CEP for the three interaction gas media are observed. Furthermore, in comparing our experiment results to the previous works driven by near-infrared laser pulses, different phenomena are found. Through numerical simulation, we find that for the two different kinds of driving fields, i.e. mid-infrared and near-infrared laser pulses, different kinds of electron trajectories contribute to the generation of high harmonics.

关键词： high-harmonic generation carrier-envelope phase mid-infrared

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Spatiotemporal modeling of mid-infrared photoluminescence from terbium(Ⅲ) ion doped chalcogenide-selenide multimode fibers

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Journal of Rare Earths 2019年第11期37卷 1157-1163页

作者： Slawomir Sujecki Lukasz Sojka Zhuoqi Tang Dinuka Jayasuriya David Furniss Emma Barney Trevor Benson Angela Seddon Telecommunications and Teleinformatics Department Wroclaw University of Science and TechnologyWroclawPoland mid-infrared Photonics Group George Green Institute for Electromagnetics ResearchFaculty of EngineeringThe University of NottinghamNottinghamUK

A numerical model was developed to study the time dynamics of photo luminescence emitted by Tb^3+doped multimode chalcogenide-selenide glass fibers pumped by laser light at approximately 2μm.The model consists of a set of partial differential equations(PDEs),which describe the temporal and spatial evolution of the photon density and level populations within the fiber.In order to solve numerically the PDEs a method of lines was applied.The modeling parameters were extracted from measurements and from data available in the literature.The numerical results obtained support experimental observations.In particular,the developed model reproduces the discrepancies that are observed between the photoluminescence decay curves obtained from different points along the fiber.The numerical analysis was also used to explain the source of these discrepancies.

关键词： Chalcogenide glass fiber Numerical modeling Photoluminescence mid-infrared light Rare earths

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mid‐infrared all‐fiber gain‐switched pulsed laser at 3μm

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Opto-Electronic Advances 2020年第5期3卷 1-10页

作者： Xiaojin Zhang Weiwei Li Jin Li Huiying Xu Zhiping Cai Zhengqian Luo Department of Electronic Engineering Xiamen UniversityXiamen 361005China

mid-infrared(MIR)fiber pulsed lasers are of tremendous application interest in eye-safe LIDAR,spectroscopy,chemical detection and medicine.So far,these MIR lasers largely required bulk optical elements,complex free-space light alignment and large footprint,precluding compact all-fiber structure.Here,we proposed and demonstrated an all-fiberized structured gain-switched Ho3+-doped ZBLAN fiber laser operating around 2.9μm.A home-made 1146 nm Raman fiber pulsed laser was utilized to pump highly concentrated single-cladding Ho3+-doped ZBLAN fiber with different lengths of 2 m or 0.25 m.A home-made MIR fiber mirror and a perpendicular-polished ZBLAN fiber end construct the all-fiberized MIR cavity.Stable gain-switched multiple states with a sub-pulse number tuned from 1 to 8 were observed.The effects of gain fiber length,pump power,pump repetition rate and output coupling ratio on performance of gain-switched pulses were further investigated in detail.The shortest pulse duration of 283 ns was attained with 10 kHz repetition rate.The pulsed laser,centered at 2.92μm,had a maximum average output power of 54.2 mW and a slope efficiency of 10.12%.It is,to the best of our knowledge,the first time to demonstrate a mid-infrared gain-switched Ho3+:ZBLAN fiber laser with compact all-fiber structure.

关键词： fiber laser mid-infrared gain-switching

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