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Jianquan Yao - One of the best experts on this subject based on the ideXlab platform.
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high Energy terahertz wave parametric oscillator with a surface emitted ring cavity configuration
Optics Letters, 2016Co-Authors: Zhen Yang, Yuye Wang, Longhuang Tang, Pan Duan, Chao Yan, Jianquan YaoAbstract:A surface-emitted ring-cavity terahertz (THz) wave parametric oscillator has been demonstrated for high-Energy THz output and fast frequency tuning in a wide frequency range. Through the special optical design with a galvano-optical scanner and four-mirror ring-cavity structure, the maximum THz wave output Energy of 12.9 μJ/pulse is achieved at 1.359 THz under the Pump Energy of 172.8 mJ. The fast THz frequency tuning in the range of 0.7–2.8 THz can be accessed with the step response of 600 μs. Moreover, the maximum THz wave output Energy from this configuration is 3.29 times as large as that obtained from the conventional surface-emitted THz wave parametric oscillator with the same experimental conditions.
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high power tunable terahertz generation from a surface emitted thz wave parametric oscillator based on two mgo linbo3 crystals
Optik, 2013Co-Authors: Pibin Bing, Jianquan YaoAbstract:Abstract A high-powered tunable terahertz wave (THz-wave) has been parametrically generated via a surface-emitted THz-wave parametric oscillator (TPO) Pumped by a multi-longitudinal-mode Q-switched Nd:YAG laser. The effective parametric gain length was enlarged by employing two MgO:LiNbO3 crystals. The tunable THz-wave radiation from 0.8 to 2.8 THz was realized via varying phase-matching angle between the Pump wave and the Stokes wave. The maximum THz-wave radiation was 173.9 nJ/pulse at 1.7 THz as the Pump Energy was 82 mJ, corresponding to an Energy conversion efficiency of about 2.12 × 10−6 and a photon conversion efficiency of about 0.035%. The first-order, the second-order and the third-order Stokes waves were observed during the experiments.
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a high Energy low threshold tunable intracavity terahertz wave parametric oscillator with surface emitted configuration
Laser Physics, 2013Co-Authors: Yuye Wang, Hongbing Jiang, Kai Zhong, Jianquan YaoAbstract:A high-Energy, low-threshold THz-wave output has been experimentally demonstrated with an intracavity terahertz-wave parametric oscillator based on a surface-emitted configuration, which was Pumped by a diode-side-Pumped Q-switched Nd:YAG laser. Different beam sizes and repetition rates of the Pump light have been investigated for high-Energy and high-efficiency THz-wave generation. The maximum THz-wave output Energy of 283 nJ/pulse was obtained at 1.54 THz under an intracavity 1064 nm Pump Energy of 59 mJ. The conversion efficiency was 4.8 × 10−6, corresponding to a photon conversion efficiency of 0.088%. The Pump threshold was 12.9 mJ/pulse. A continuously tunable range from 0.75 to 2.75 THz was realized.
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high powered tunable terahertz source based on a surface emitted terahertz wave parametric oscillator
Optical Engineering, 2012Co-Authors: Pibin Bing, Jianquan Yao, Kai ZhongAbstract:A high-powered pulsed terahertz (THz)-wave has been parametrically generated via a surface-emitted THz-wave parametric oscillator (TPO). The effective parametric gain length under the noncollinear phase matching condition was calculated for optimization of the parameters of the TPO. A large volume crystal of MgO:LiNbO 3 was used as the gain medium. THz-wave radiation covering a frequency range from 0.87 to 2.73 THz was obtained. The average power of the THz-wave was 9.12 μW at 1.75 THz when the Pump Energy was 94 mJ, corresponding to an Energy conversion efficiency of about 9.7×10−6 and a photon conversion efficiency of about 0.156%. The THz-wave power in our experiments is high enough for practical applications to spectrum analysis and imaging.
J. Biegert - One of the best experts on this subject based on the ideXlab platform.
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Table-top high-Energy 7 μm OPCPA and 260 mJ Ho:YLF Pump laser
Optics Letters, 2019Co-Authors: U. Elu, T. Steinle, D. Sanchez, L. Maidment, K. Zawilski, P. Schunemann, U. Zeitner, C. Simon-boisson, J. BiegertAbstract:We present a state-of-the-art compact high-Energy mid-infrared (mid-IR) laser system for TW-level eight-cycle pulses at 7 μm. This system consists of an Er:Tm:Ho:fiber MOPA which serves as the seeder for a ZGP-based optical parametric chirped pulse amplification (OPCPA) chain, in addition to a Ho:YLF amplifier which is Tm:fiber Pumped. Featuring all-optical synchronization, the system delivers 260 mJ Pump Energy at 2052 nm and 16 ps duration at 100 Hz with a stability of 0.8% rms over 20 min. We show that chirp inversion in the OPCPA chain leads to excellent Energy extraction and aids in compression of the 7 μm pulses to eight optical cycles (188 fs) in bulk BaF2 with 93.5% efficiency. Using 21.7 mJ of the available Pump Energy, we generate 0.75 mJ Energy pulses at 7 μm due to increased efficiency with a chirp inversion scheme. The pulse quality of the system’s output is shown by generating high harmonics in ZnSe which span up to harmonic order 13 with excellent contrast. The combination of the passive carrier-envelope phase stable mid-IR seed pulses and the high-Energy 2052 nm picosecond pulses makes this compact system a key enabling tool for the next generation of studies on extreme photonics, strong field physics, and table-top coherent X-ray science.
Haihe Lu - One of the best experts on this subject based on the ideXlab platform.
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200 j high efficiency ti sapphire chirped pulse amplifier Pumped by temporal dual pulse
Optics Express, 2017Co-Authors: Lianghong Yu, Shuai Li, Cheng Wang, Xiaoyan Liang, Wenqi Li, Xiaolong Yuan, Lu Xu, Yi Xu, Jun Lu, Haihe LuAbstract:We report on an experimental and theoretical study of a large-aperture Ti:Sapphire (Ti:S) amplifier Pumped with a novel temporal dual-pulse scheme to suppress the parasitic lasing (PL) and transverse amplified spontaneous emission (TASE) for high-Energy chirped-pulse amplification (CPA). The Pump Energy distribution was optimized and the time delay between each Pump pulse was controlled precisely. Both the numerical and experimental results confirm that the temporal dual-pulse Pump technique can effectively suppress PL and TASE. The maximum output Energy of 202.8 J was obtained from the final 150-mm-diameter Ti:S booster amplifier with a Pump Energy of 320.0 J, corresponding to a conversion efficiency of 49.3%. The compressed pulse duration of 24.0 fs was measured with a throughput efficiency of 64%, leading to a peak power of 5.4 PW. This novel temporal dual-pulse Pump technique has potential applications in a 10 PW CPA laser system.
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multiterawatt laser system based on optical parametric chirped pulse amplification
Optics Letters, 2002Co-Authors: Zhizhan Xu, Haihe Lu, Ruxin Li, Yuxin Leng, Zhengquan Zhang, Wenqi Zhang, B TangAbstract:A compact multiterawatt laser system based on optical parametric chirped pulse amplification is demonstrated. Chirped pulses are amplified from 20 pJ to 900 mJ by two lithium triborate optical parametric preamplifiers and a final KDP optical parametric power amplifier with a Pump Energy of 5 J at 532 nm from Nd:YAG-Nd: glass hybrid amplifiers, After compression, we obtained a final output of 570-mJ-155-fs pulses with a peak power of 3.67 TW, which is the highest output power from an optical parametric chirped pulse amplification laser, to the best of our knowledge. (C) 2002 Optical Society of America.
Jongmi Lee - One of the best experts on this subject based on the ideXlab platform.
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0 1 hz 1 0 pw ti sapphire laser
Optics Letters, 2010Co-Authors: Jae Hee Sung, Seong Ku Lee, Tae Moo Jeong, Jongmi LeeAbstract:We report on the generation of 1.0PW, 30fs laser pulses at a 0.1Hz repetition rate from a chirped-pulse amplification Ti:sapphire laser system. The Energy of the laser pulses is amplified up to 47J in a final three-pass booster amplifier having 96J Pump Energy. To the best of our knowledge, this is the first petawatt Ti:sapphire laser system at a 0.1Hz repetition rate. The shot-to-shot Energy fluctuation of the laser pulses is as low as 0.53% in rms value, and the laser pulses have homogeneous flattop spatial beam profiles.
Hao Teng - One of the best experts on this subject based on the ideXlab platform.
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carrier envelope phase passively stabilized near infrared laser pulses from a dual frequency Pumped noncollinear optical parametric amplifier
Chinese Science Bulletin, 2014Co-Authors: Shuyan Guo, Weijun Ling, Hao Teng, Wei Zhang, Lifeng Wang, Zhiyi WeiAbstract:By inversing the signal and idler in a two-stage noncollinear optical parametric amplifier which is, respectively, Pumped by the second harmonic and fundamental wave of femtosecond Ti:sapphire laser at repetition rate of 1 kHz, the carrier-envelope phase (CEP) passively stabilized pulses with a tunable wavelength from 1.1 to 1.6 μm are obtained with maximum Energy of 95 μJ at 1.3 μm under the Pump Energy of 500 μJ. The CEP jitter of pulses is 108 mrad measured by an f-2f interferometer. This work demonstrates a new way to efficiently generate tunable near-infrared femtosecond laser pulses with self-stabilized CEP.
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high contrast 1 16 pw ti sapphire laser system combined with a doubled chirped pulse amplification scheme and a femtosecond optical parametric amplifier
Optics Letters, 2011Co-Authors: Zhaohua Wang, Zhongwei Shen, Qing Zhang, Hao TengAbstract:Based on a combined scheme of doubled chirped-pulse amplification and a femtosecond noncollinear optical-parametric amplifier, a high-contrast femtosecond laser pulse with Energy of up to 32.3 J has been generated by improving the gain efficiency and boosting the Pump Energy to 120 J in the final amplifier. Our measurements show that the contrast ratio of the main laser pulse is around 1010 within the time scale of −400 ps and the duration of compressed pulse is 27.9 fs, corresponding to a peak power of 1.16 PW.