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mid-infrared laser with 1.2 W output power based on PPLT

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Science China(Physics,Mechanics & Astronomy) 2010年第4期53卷 638-642页

作者： Lü XinJie, ZHAO Gang, LI GuiJun, GAO ZhiDa, PAN ShuDi & ZHU ShiNing National Laboratory of Solid State Microstructure, Nanjing University, Nanjing 210093, China 1. National Laboratory of Solid State Microstructure Nanjing University Nanjing 210093 China

The optical parametric oscillator (OPO) based on the periodically poled lithium tantalate (PPLT) crystal (40 mm×5 mm×1 mm) is fabricated. The OPO is pumped by a Q-switched Nd:YAG laser working at 1.064 μm. An average idler output power (around 3.8 μm) of 1.2 W and signal output power (around 1.48 μm) of 3 W are obtained when the pump power is 20 W.

关键词： optical superlattice mid-infrared laser optical parametric oscillator (OPO) periodically poled lithium tantalate (PPLT)

mid-infrared dual-comb spectroscopy with electro-optic modulators

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Light(Science & Applications) 2017年第1期6卷 450-457页

作者： Ming Yan Pei-Ling Luo Kana Iwakuni Guy Millot Theodor W Hänsch Nathalie Picqué Max-Planck-Institut für Quantenoptik 85748 GarchingGermany Fakultät für Physik Ludwig-Maximilians-Universität München80799 MünchenGermany Laboratoire Interdisciplinaire Carnot de Bourgogne UMR 6303 CNRS-Univ.Bourgogne Franche-ComtéF-21078 DijonFrance Institut des Sciences Moléculaires d’Orsay(ISMO) CNRSUniv.Paris-SudUniversitéParis-SaclayF-91405 OrsayFrance

Absorption spectroscopy of fundamental ro-vibrational transitions in the mid-infrared region provides a powerful tool for studying the structure and dynamics of molecules in the gas phase and for sensitive and quantitative gas *** frequency combs permit novel approaches to perform broadband molecular *** dual-comb spectroscopy without moving parts can achieve particularly high speed,sensitivity and ***,achieving Doppler-limited resolution in the mid-infrared still requires overcoming instrumental *** we demonstrate a new approach based on difference-frequency generation of frequency-agile near-infrared frequency combs that are produced using electro-optic *** combs have a remarkably flat intensity distribution,and their positions and line spacings can be freely selected by simply dialing a *** the proposed technique,we record,in the 3-μm region,Doppler-limited absorption spectra with resolved comb lines within milliseconds,and precise molecular line parameters are *** technique holds promise for fast and sensitive time-resolved studies of,for example,trace gases.

关键词： Fourier transform spectroscopy frequency comb mid-infrared molecular spectroscopy

Broadband third-order optical nonlinearities of layered franckeite towards mid-infrared regime

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Chinese Physics B 2024年第10期33卷 275-281页

作者： Zhi-Qiang Xu Tian-Tian Zhou Jie Li Dong-Yang Liu Yuan He Ning Li Xiao Liu Li-Li Miao Chu-Jun Zhao Shuang-Chun Wen Key Laboratory for Micro/Nano Optoelectronic Devices of Ministry of Education&Hunan Provincial Key Laboratory of Low-Dimensional Structural Physics and Devices School of Physics and ElectronicsHunan UniversityChangsha 410082China School of Mechanical and Electrical Engineering Heze UniversityHeze 274015China

The study of nonlinear optical responses in the mid-infrared(mid-IR)regime is essential for advancing ultrafast mid-IR laser ***,nonlinear optical effects under mid-IR excitation are rarely reported due to the lack of suitable nonlinear optical *** natural van derWaals heterostructure franckeite,known for its narrow bandgap and stability in air,shows great potential for developing mid-IR nonlinear optical *** have experimentally demonstrated that layered franckeite exhibits a broadband wavelength-dependent nonlinear optical response in the mid-IR spectral *** nanosheets were prepared using a liquid-phase exfoliation method,and their nonlinear optical response was characterized in the spectral range of 3000 nm to 5000 *** franckeite nanosheets exhibit broadband wavelengthdependent third-order nonlinearities,with nonlinear absorption and refraction coefficients estimated to be about 10^(-7)cm/W and 10^(-11)cm^(2)/W,***,a passively Q-switched fluoride fiber laser operating around a wavelength of 2800 nm was achieved,delivering nanosecond pulses with a signal-to-noise ratio of 43.6 dB,based on the nonlinear response of *** findings indicate that layered franckeite possesses broadband nonlinear optical characteristics in the mid-IR region,potentially enabling new possibilities for mid-IR photonic devices.

关键词： third-order optical nonlinearities franckeite mid-infrared Q-switching

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

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 *** 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

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 2μ*** 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 *** order to solve numerically the PDEs a method of lines was *** modeling parameters were extracted from measurements and from data available in the *** numerical results obtained support experimental *** particular,the developed model reproduces the discrepancies that are observed between the photoluminescence decay curves obtained from different points along 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

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

Experimental and numerical investigation of mid-infrared laser in Pr^(3+)-doped chalcogenide fiber

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Chinese Physics B 2019年第2期28卷 257-263页

作者： Hua Chen Ke-Lun Xia Zi-Jun Liu Xun-Si Wang Xiang-Hua Zhang Yin-Sheng Xu Shi-Xun Dai Laboratory of infrared Materials and Devices Advanced Technology Research InstituteNingbo University Key Laboratory of Photoelectric Detection Materials and Devices of Zhejiang Province Laboratory of Glasses and Ceramics UMR CNRS 6226University of Rennes 1

We report on a chalcogenide glass fiber doped with Pr^(3+) that can be used for commercialized 1.5-μm and 2-μm laser excitations by emitting broadband 3 μm–5.5 μm fluorescence, which is extruded into a preform and then drawn into a step-index fiber. The spectroscopic properties of the fiber and glass are reported, and the mid-infrared fiber lasers are also numerically investigated. Cascade lasing is employed to increase the inversion population of the upper laser level. The particle swarm approach is applied to optimize the fiber laser parameters. The output power can reach 1.28 W at 4.89-μm wavelength, with a pump power of 5 W, excitation wavelength at 2.04 μm, Pr^(3+) ion concentration at 4.22 × 10^(25) ions/m^3,fiber length at 0.94 m, and fiber background loss at 3 dB/m.

关键词： mid-infrared fiber laser chalcogenide glass fiber rare earth doped glass fiber laser modelling

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