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Trends in ultrashort and ultrahigh power laser pulses based on optical parametric chirped pulse amplification
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作者 徐露 於亮红 +4 位作者 储玉喜 甘泽彪 梁晓燕 李儒新 徐至展 《Chinese Physics B》 SCIE EI CAS CSCD 2015年第1期89-94,共6页
Since the proof-of-principle demonstration of optical parametric amplification to efficiently amplify chirped laser pulses in 1992, optical parametric chirped pulse amplification(OPCPA) became the most promising met... Since the proof-of-principle demonstration of optical parametric amplification to efficiently amplify chirped laser pulses in 1992, optical parametric chirped pulse amplification(OPCPA) became the most promising method for the amplification of broadband optical pulses. In the meantime, we are witnessing an exciting progress in the development of powerful and ultrashort pulse laser systems that employ chirped pulse parametric amplifiers. The output power and pulse duration of these systems have ranged from a few gigawatts to hundreds of terawatts with a potential of tens of petawatts power level. Meanwhile, the output pulse duration based on optical parametric amplification has entered the range of fewoptical-cycle field. In this paper, we overview the basic principles, trends in development, and current state of the ultrashort and laser systems based on OPCPA, respectively. 展开更多
关键词 optical parametric chirped pulse amplification high-power laser system
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Phase matched scanning optical parametric chirped pulse amplification based on pump beam deflection
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作者 Rong Ye Huining Dong +1 位作者 Xianyun Wu Xiang Gao 《Chinese Physics B》 SCIE EI CAS CSCD 2021年第10期351-355,共5页
Combined with the optical beam deflection,a novel approach of phase matched broadband scanning optical parametric chirped pulse amplification(OPCPA)was proposed.For this scheme,there was no superfluous operations to t... Combined with the optical beam deflection,a novel approach of phase matched broadband scanning optical parametric chirped pulse amplification(OPCPA)was proposed.For this scheme,there was no superfluous operations to the chirped signal pulse which propagated in a changeless direction straightforward,but the pump beam were deflected in space with time by passing through a KTN crystal,which was applied with varied driving voltage.The theories of phase matching of each chirped signal frequency based on pump beam deflection was analyzed detailedly.And the type-I amplification of chirped signal with 800 nm central wavelength and 20 nm bandwidth pumped by 532 nm in BBO crystal was simulated as a case in point.The simulation results showed that the spectral distribution of chirped signal pulse was almost the same as the initial form,i.e.,there was nearly no narrowing on the amplified spectrum by using of the scanning OPCPA based on pump beam deflection.In addition,the simulations demonstrated that it was worth minimizing the voltage deviation applied to KTN crystal as much as possible for the sake of better waveform,larger bandwidth and higher conversion efficiency of amplified signal pulse in the proposed scanning OPCPA. 展开更多
关键词 optical parametric chirped pulse amplification optical beam deflection phase matching SCANNING KTN crystal
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Wavefront evolution of the signal beam in Ti:sapphire chirped pulse amplifier 被引量:1
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作者 Zhen Guo Lianghong Yu +2 位作者 Wenqi Li Zebiao Gan Xiaoyan Liang 《Chinese Physics B》 SCIE EI CAS CSCD 2019年第1期385-389,共5页
We studied the evolution of wavefront aberration(WFA) of a signal beam during amplification in a Ti:sapphire chirped pulse amplification(CPA) system. The results verified that the WFA of the amplified laser beam has l... We studied the evolution of wavefront aberration(WFA) of a signal beam during amplification in a Ti:sapphire chirped pulse amplification(CPA) system. The results verified that the WFA of the amplified laser beam has little relation with the change of the pump beam energies. Transverse parasitic lasing that might occur in CPA hardly affects the wavefront of the signal beam. Thermal effects were also considered in this study, and the results show that the thermal effect cumulated in multiple amplification processes also has no obvious influence on the wavefront of the signal beam for a single-shot frequency. The results presented in this paper confirmed experimentally that the amplification in a Ti:sapphire CPA system has little impact on the WFA of the signal beam and it is very helpful for wavefront correction of single-shot PW and multi-PW laser systems based on Ti:sapphire. 展开更多
关键词 WAVEFRONT ABERRATION Ti:sapphire chirped pulse amplification WAVEFRONT correction
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High-energy femtosecond Yb-doped all-fiber monolithic chirped-pulse amplifier at repetition rate of 1 MHz
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作者 吕志国 滕浩 +2 位作者 王立娜 王军利 魏志义 《Chinese Physics B》 SCIE EI CAS CSCD 2016年第9期364-367,共4页
A high-energy femtosecond all ytterbium fiber amplifier based on a chirped-pulse amplification(CPA) technique at a repetition rate of 1 MHz seeded by a dispersion-management mode-locked picosecond broadband oscillat... A high-energy femtosecond all ytterbium fiber amplifier based on a chirped-pulse amplification(CPA) technique at a repetition rate of 1 MHz seeded by a dispersion-management mode-locked picosecond broadband oscillator is studied.We find that the compressed pulse duration is dependent on the amplified energy,the pulse duration of 804 fs corresponds to the maximum amplified energy of 10.5 μJ,while the shortest pulse duration of 424 fs corresponds to the amplified energy of 6.75 μJ.The measured energy fluctuation is approximately 0.46% root mean square(RMS) over 2 h.The low-cost femtosecond fiber laser source with super-stability will be widely used in industrial micromachines,medical therapy,and scientific studies. 展开更多
关键词 high-energy femtosecond pulse chirped-pulse amplification all-fiber amplifier
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High-power all-fiber linearly polarized Yb-doped chirped pulse amplifier based on active polarization control
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作者 王涛 任帅 +6 位作者 常洪祥 任博 郭琨 李灿 马鹏飞 冷进勇 周朴 《Chinese Optics Letters》 SCIE EI CAS CSCD 2024年第4期66-70,共5页
High-power ultrafast laser amplification based on a non-polarization maintaining fiber chirped pulse amplifier is demonstrated.The active polarization control technology based on the root-mean-square propagation(RMS-p... High-power ultrafast laser amplification based on a non-polarization maintaining fiber chirped pulse amplifier is demonstrated.The active polarization control technology based on the root-mean-square propagation(RMS-prop)algorithm is employed to guarantee a linearly polarized output from the system.A maximum output power of 402.3 W at a repetition rate of 80 MHz is realized with a polarization extinction ratio(PER)of>11.4 dB.In addition,the reliable operation of the system is verified by examining the stability and noise properties of the amplified laser.The M2factor of the laser beam at the highest output power is measured to be less than 1.15,indicating a diffraction-limited beam quality.Finally,the amplified laser pulse is temporally compressed to 755 fs with a highest average power of 273.8 W.This is the first time,to the best of our knowledge,that the active polarization control technology was introduced into the high-power ultrafast fiber amplifier. 展开更多
关键词 active polarization control root-mean-square propagation algorithm linearly polarized laser chirped pulse amplification femtosecond laser fiber laser
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High-power femtosecond laser generation from an all-fiber linearly polarized chirped pulse amplifier 被引量:9
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作者 Tao Wang Can Li +4 位作者 Bo Ren Kun Guo Jian Wu Jinyong Leng Pu Zhou 《High Power Laser Science and Engineering》 SCIE EI CAS CSCD 2023年第2期81-87,共7页
An all-fiber high-power linearly polarized chirped pulse amplification(CPA)system is experimentally demonstrated.Through stretching the pulse duration to a full width of approximately 2 ns with two cascaded chirped fi... An all-fiber high-power linearly polarized chirped pulse amplification(CPA)system is experimentally demonstrated.Through stretching the pulse duration to a full width of approximately 2 ns with two cascaded chirped fiber Bragg gratings(CFBGs),a maximum average output power of 612 W is achieved from a high-gain Yb-doped fiber that has a core diameter of 20μm with a slope efficiency of approximately 68%at the repetition rate of 80 MHz.At the maximum output power,the polarization degree is 92.5%and the M^(2)factor of the output beam quality is approximately 1.29;the slight performance degradations are attributed to the thermal effects in the main amplifier.By optimizing the B-integral of the amplifier and finely adjusting the higher-order dispersion of one of the CFBGs,the pulse width is compressed to 863 fs at the highest power with a compression efficiency of 72%,corresponding to a maximum compressed average power of 440.6 W,single pulse energy of 5.5μJ and peak power of about 4.67 MW.To the best of our knowledge,this is the highest average power of a femtosecond laser directly generated from an all-fiber linearly polarized CPA system. 展开更多
关键词 chirped pulse amplification femtosecond laser fiber laser high-power laser ultrafast laser
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Monolithic tapered Yb‑doped fber chirped pulse amplifer delivering 126μJ and 207 MW femtosecond laser with near difraction‑limited beam quality 被引量:1
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作者 Tao Wang Bo Ren +3 位作者 Can Li Kun Guo Jinyong Leng Pu Zhou 《Frontiers of Optoelectronics》 EI CSCD 2023年第3期169-178,共10页
In this work,a high-energy and high peak power chirped pulse amplifcation system with near difraction-limited beam quality based on tapered confned-doped fber(TCF)is experimentally demonstrated.The TCF has a core nume... In this work,a high-energy and high peak power chirped pulse amplifcation system with near difraction-limited beam quality based on tapered confned-doped fber(TCF)is experimentally demonstrated.The TCF has a core numerical aperture of 0.07 with core/cladding diameter of 35/250µm at the thin end and 56/400μm at the thick end.With a backward-pumping confguration,a maximum single pulse energy of 177.9μJ at a repetition rate of 504 kHz is realized,corresponding to an average power of 89.7 W.Through partially compensating for the accumulated nonlinear phase during the amplifcation process via adjusting the high order dispersion of the stretching chirped fber Bragg grating,the duration of the amplifed pulse is compressed to 401 fs with a pulse energy of 126.3μJ and a peak power of 207 MW,which to the best of our knowledge represents the highest peak power ever reported from a monolithic ultrafast fber laser.At the highest energy,the polarization extinction ratio and the M2 factor were respectively measured to be~19 dB and 1.20.In addition,the corresponding intensity noise properties as well as the short-and long-term stability were also examined,verifying a stable operation of the system.It is believed that the demonstrated laser source could fnd important applications in,for example,advanced manufacturing and photomedicine. 展开更多
关键词 High-energy laser Femtosecond laser Tapered fber Fiber laser chirped pulse amplifer
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Thulium-doped all-PM fiber chirped pulse amplifier delivering 314 W average power 被引量:1
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作者 Bo Ren Can Li +3 位作者 Tao Wang Kun Guo Jian Wu Pu Zhou 《High Power Laser Science and Engineering》 SCIE CAS CSCD 2023年第6期77-82,共6页
A high-power all polarization-maintaining(PM) chirped pulse amplification(CPA) system operating in the 2.0 μm range is experimentally demonstrated.Large mode area(LMA) thulium-doped fiber(TDF) with a core/cladding di... A high-power all polarization-maintaining(PM) chirped pulse amplification(CPA) system operating in the 2.0 μm range is experimentally demonstrated.Large mode area(LMA) thulium-doped fiber(TDF) with a core/cladding diameter of25/400 μm is employed to construct the main amplifier.Through dedicated coiling and cooling of the LMA-TDF to manage the loss of the higher order mode and thermal effect,a maximum average power of 314 W with a slope efficiency of 52% and polarization extinction ratio of 20 dB is realized.The pulse duration is compressed to 283 fs with a grating pair,corresponding to a calculated peak power of 10.8 MW,considering the compression efficiency of 88% and the estimated Strehl ratio of 89%.Moreover,through characterizing the noise properties of the laser,an integrated relative intensity noise of 0.11% at 100 Hz-1 MHz is obtained at the maximum output power,whereas the laser timing jitter is degraded by the final amplifier from 318 to 410 fs at an integration frequency of 5 kHz to 1 MHz,owing to the self-phase modulation effect-induced spectrum broadening.The root-mean-square of long-term power fluctuation is tested to be0.6%,verifying the good stability of the laser operation.To the best of our knowledge,this is the highest average power of an ultrafast laser realized from an all-PM-fiber TDF-CPA system ever reported. 展开更多
关键词 chirped pulse amplification high average power thulium-doped fiber laser ultrafast laser
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Chirped pulse amplification: review and prospective from diffractive optics [Invited] 被引量:5
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作者 Changhe Zhou 《Chinese Optics Letters》 SCIE EI CAS CSCD 2020年第11期12-16,共5页
It is well-known that the chirped pulse amplification(CPA) technique won the award for the 2018 Nobel Prize in Physics to Mourou and Strickland. The compression and stretching using gratings is the essence of the CPA ... It is well-known that the chirped pulse amplification(CPA) technique won the award for the 2018 Nobel Prize in Physics to Mourou and Strickland. The compression and stretching using gratings is the essence of the CPA technique for amplifying femtosecond laser pulses. It seems the public is less aware that there are also other structures for compression and stretching of femtosecond laser pulses using other diffractive gratings, such as doubled-density gratings and deep-etched gratings. Therefore, from the view of diffractive optics, the CPA technique is reviewed with different approaches and experimental implementations that are not only useful for a more comprehensive retrospective overview of CPA, but also for the prospective of the CPA technique,which might lead us to new areas of picometer and femtometer optics in the future. 展开更多
关键词 chirped pulse amplification FEMTOSECOND diffractive gratings
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Compact pulsed thulium‐doped fiber laser for topographical patterning of hydrogels 被引量:2
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作者 Elizabeth Lee Biao Sun +5 位作者 Jiaqi Luo Satnam Singh Deepak Choudhury Derrick Yong Xia Yu Qijie Wang 《Opto-Electronic Advances》 2020年第6期9-17,I0001,共10页
We report the generation of high energy 2μm picosecond pulses from a thulium-doped fiber master oscillator power amplifier system.The all-fiber configuration was realized by a flexible large-mode area photonic crysta... We report the generation of high energy 2μm picosecond pulses from a thulium-doped fiber master oscillator power amplifier system.The all-fiber configuration was realized by a flexible large-mode area photonic crystal fiber(LMA-PCF).The amplifier output is a linearly-polarized 1.5 ns,100 kHz pulse train with a pulse energy of up to 250μJ.Pulse compression was achieved with(2+2)-pass chirped volume Bragg grating(CVBG)to obtain a 2.8 ps pulse width with a total pulse energy of 46μJ.The overall system compactness was enabled by the all-fiber amplifier design and the multi-pass CVBG-based compressor.The laser output was then used to demonstrate high-speed direct-writing capability on a temperature-sensitive biomaterial to change its topography(i.e.fabricate microchannels,foams and pores).The topographical modifications of biomaterials are known to influence cell behavior and fate which is potentially useful in many cell and tissue engineering applications. 展开更多
关键词 Tm-doped fiber lasers chirped pulse amplification photonic crystal fiber
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A terawatt Nd:glass chirped pulse amplification laser system seeded by two order optical parametric amplification
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作者 ZHANG LiFu FU XiQuan +3 位作者 DENG JianQin ZHANG Jin WEN ShuangChun FAN DianYuan 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS 2012年第5期776-780,共5页
We present the performance of a high-power Nd:glass laser system,which produces a 1.1 J,250 fs,7.3 nm broadband laser pulse based on the combination of optical parametric amplification(OPA) and chirped pulse amplifica... We present the performance of a high-power Nd:glass laser system,which produces a 1.1 J,250 fs,7.3 nm broadband laser pulse based on the combination of optical parametric amplification(OPA) and chirped pulse amplification(CPA).The two-stage OPA provides broadband seed pulses for the three-stage Nd:glass amplifiers based on the technology of CPA.Compared to the conventional oscillator seed source,the most important advantage of such a seed source supplied by the two-stage OPA is that it possesses the capacities of broad bandwidth and high energy. 展开更多
关键词 broadband laser pulse optical parametric amplification (OPA) chirped pulse amplification (cpa
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Generation of high-contrast, joule-level pulses based on Nd:glass chirped pulse amplification laser
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作者 Xiaoming Lu Yujie Peng +4 位作者 Yanyan Li Xinliang Wang Xiaoyang Guo Yi Xu Yuxin Leng 《High Power Laser Science and Engineering》 SCIE CAS CSCD 2016年第4期1-6,共6页
We demonstrate a high-contrast, joule-level Nd:glass laser system operating at 0.5 Hz repetition rate based on a double chirped pulse amplification(CPA) scheme. By injecting high-contrast, high-energy seed pulses into... We demonstrate a high-contrast, joule-level Nd:glass laser system operating at 0.5 Hz repetition rate based on a double chirped pulse amplification(CPA) scheme. By injecting high-contrast, high-energy seed pulses into the Nd:glass CPA stage, the pulse energy is amplified to 1.9 J through two optical parametric CPA stages and two Nd:glass amplifiers. The temporal contrast of compressed pulse is measured down to the level of 10^(-8)at tens of ps, and 10^(-10) near 200 ps before the main pulse, respectively. 展开更多
关键词 chirped pulse amplification ND GLASS temporal contrast
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Splicing technology of Ti:sapphire crystals for a high-energy chirped pulse amplifier laser system 被引量:1
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作者 Yanqi Liu Yuxin Leng +2 位作者 Xiaoming Lu Yi Xu Cheng Wang 《High Power Laser Science and Engineering》 SCIE CAS 2014年第2期1-8,共8页
We develop a splicing technology of Ti:sapphire crystals for a high-energy chirped pulse amplifier laser system that can suppress the parasitic lasing to improve the amplification efficiency compared to a large-size s... We develop a splicing technology of Ti:sapphire crystals for a high-energy chirped pulse amplifier laser system that can suppress the parasitic lasing to improve the amplification efficiency compared to a large-size single Ti:sapphire crystal amplifier. Theoretical investigations on the characteristics of the amplifier with four splicing Ti:sapphire crystals,such as parasitic-lasing suppression and amplification efficiencies, are carried out. Some possible issues resulting from this splicing technology, including spectral modulation, stretching or splitting of the temporal profile, and the sidelobe generation in the spatial domain(near field and far field), are also investigated. Moreover, the feasibility of the splicing technology is preliminarily demonstrated in an experiment with a small splicing Ti:sapphire crystals amplifier. The temporal profile and spatial distribution of the output pulse from the splicing Ti:sapphire crystal amplifier are discussed in relation to the output pulse from a single Ti:sapphire crystal amplifier. 展开更多
关键词 chirped pulse amplification SPLICING TECHNOLOGY Ti:sapphire crystal amplifIER
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用于多模态非线性光学显微成像的增益管理放大全光纤飞秒激光技术 被引量:1
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作者 雷如梦 李中超 +2 位作者 李孝燊 苏俊昌 刘伟 《光子学报》 EI CAS CSCD 北大核心 2024年第8期130-139,共10页
基于增益管理非线性放大的机制,求解非线性薛定谔方程和速率方程对脉冲在增益光纤中的传播过程进行仿真,研究了脉冲在增益光纤中的演化过程。结果表明,优化预啁啾量和种子光强度,可改变脉冲在增益光纤中的增益曲线。在动态增益曲线与非... 基于增益管理非线性放大的机制,求解非线性薛定谔方程和速率方程对脉冲在增益光纤中的传播过程进行仿真,研究了脉冲在增益光纤中的演化过程。结果表明,优化预啁啾量和种子光强度,可改变脉冲在增益光纤中的增益曲线。在动态增益曲线与非线性效应的共同作用下,输出光脉冲的频谱会迅速展宽数倍并带有线性啁啾,进而脉冲可被压缩至近傅里叶变换极限。为验证该超短脉冲产生方式的可行性,采用仿真结果中的最佳参数设置,成功设计并搭建了一台高能量、短脉宽、高质量的超快光纤光源。该光源可实现中心波长为1060 nm、重复频率为35 MHz、平均功率为267.4 mW以及脉冲宽度仅为39.5 fs的激光输出,与仿真结果高度一致。同现有的超短脉冲产生方式相比,本实验装置的结构更简单、造价更低、装置更紧凑、产生光束品质更佳。 展开更多
关键词 多模态非线性光学显微成像 增益管理非线性放大 线性啁啾 极端光谱展宽 超短脉冲
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用于OPCPA展宽器的原理和优化设计 被引量:6
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作者 熊红军 赵卫 陈国夫 《光子学报》 EI CAS CSCD 北大核心 2004年第12期1441-1444,共4页
给出了一种ffner型展宽器的原理和设计,在光线追迹法的基础上用Matlab辅助程序进行了数值模拟计算,得到了影响展宽器性能参数的直观图形,并对这些参数如何影响展宽器的性能进行了分析讨论,最后给出了用于OPCPA展宽器的最优化设计参数.... 给出了一种ffner型展宽器的原理和设计,在光线追迹法的基础上用Matlab辅助程序进行了数值模拟计算,得到了影响展宽器性能参数的直观图形,并对这些参数如何影响展宽器的性能进行了分析讨论,最后给出了用于OPCPA展宽器的最优化设计参数.结果表明这种展宽器能将15fs的脉冲展宽到900ps. 展开更多
关键词 光学参量啁啾脉冲放大 利特洛角 脉冲展宽 欧浮纳展宽器
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啁啾匹配OPCPA方案用于消除超短激光脉冲的预脉冲 被引量:2
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作者 曾曙光 张彬 +1 位作者 孙年春 隋展 《强激光与粒子束》 EI CAS CSCD 北大核心 2012年第2期394-398,共5页
采用了一种利用啁啾匹配光参量啁啾脉冲放大(OPCPA)技术来消除泵浦脉冲时间窗口内的预脉冲的方法,并对该方法展开了数值模拟研究。分析了泵浦光脉冲形状、预脉冲提前时间等因素对预脉冲消除效果以及信噪比提升情况的影响。通过与传统的... 采用了一种利用啁啾匹配光参量啁啾脉冲放大(OPCPA)技术来消除泵浦脉冲时间窗口内的预脉冲的方法,并对该方法展开了数值模拟研究。分析了泵浦光脉冲形状、预脉冲提前时间等因素对预脉冲消除效果以及信噪比提升情况的影响。通过与传统的非共线OPCPA方案对比,发现啁啾匹配OPCPA方案可以消除掉离主脉冲更近的预脉冲,且它对预脉冲的消除效果受泵浦光脉冲形状的影响较小。 展开更多
关键词 光参量啁啾脉冲放大 啁啾匹配 预脉冲 对比度 信噪比
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大信号增益区的宽带OPCPA系统特性分析 被引量:1
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作者 马再如 冯国英 +3 位作者 苏娟 陈建国 朱启华 曾小明 《强激光与粒子束》 EI CAS CSCD 北大核心 2007年第3期381-385,共5页
利用大啁啾信号光脉冲的光谱在时域内的分布特点,采用四阶龙格-库塔算法对宽光谱的光参量啁啾脉冲放大(OPCPA)激光器特性进行了数值分析。以LBO晶体为增益介质,信号光脉冲宽度取100 ps、啁啾系数为1000,中心波长为800 nm;泵浦光的中心... 利用大啁啾信号光脉冲的光谱在时域内的分布特点,采用四阶龙格-库塔算法对宽光谱的光参量啁啾脉冲放大(OPCPA)激光器特性进行了数值分析。以LBO晶体为增益介质,信号光脉冲宽度取100 ps、啁啾系数为1000,中心波长为800 nm;泵浦光的中心波长为532 nm,脉宽为100 ps。数值计算结果表明:信号光的非线性相位变化的中心部分为线性分布区,且随增益饱和的程度增大而增大;系统的功率转换效率有准振荡结构,且其第一个极值点为系统能量最大的转换率点;随着系统进入增益饱和区,压缩光脉冲的对比度明显降低,预脉冲长度显著增大。 展开更多
关键词 光参量啁啾脉冲放大 宽带信号 大信号增益 数值模拟
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用WDF描述线性CPA系统 被引量:1
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作者 雒文斌 曹东茂 +2 位作者 任兆玉 杨志勇 侯洵 《应用光学》 CAS CSCD 2000年第3期24-27,共4页
利用维格纳分布函数 (WDF)描述脉宽大于 1 0 0 fs的高斯型脉冲通过啁啾脉冲放大(CPA)系统时脉冲的时域、频域变化情况 。
关键词 维格纳分布函数 线性啁啾 啁啾脉冲放大 激光
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Amplification and compression of Ti:sapphire femtosecond pulses at high-repetition-rate 被引量:2
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作者 赵尚弘 王屹山 +2 位作者 陈国夫 王贤华 侯洵 《Science China Mathematics》 SCIE 1998年第1期107-112,共6页
The experiment of the generation and amplification of femetosecond Ti:sapphire laser pulse at high repetition rate is reported. The laser pulses with minimum pulsewidth 15 fs, maximum spectrum width of 80 nm, average ... The experiment of the generation and amplification of femetosecond Ti:sapphire laser pulse at high repetition rate is reported. The laser pulses with minimum pulsewidth 15 fs, maximum spectrum width of 80 nm, average power of 200 mW are generated from a home-built self-mode-locked Ti:sapphire laser. As a seed pulse which is selected from the oscillator, the laser pulse is further amplified by using chirped-pulse-amplification technology in a Ti:sapphire amplifier from which a kind of pulses with single-pulse-energy of 100 uj, pulsewidth after compressing of 50 fs at 5 kHz repetition rate are produced. The system design and experimental results are discussed. 展开更多
关键词 Ti:sapphire self mode LOCKING femtosecond pulses chirped pulse amplification.
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High contrast amplification at 1053 nm limited by pulse stretching-compressing process
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作者 陆效明 彭宇杰 +5 位作者 李妍妍 郭晓杨 冷雨欣 隋展 许毅 王新亮 《Chinese Optics Letters》 SCIE EI CAS CSCD 2016年第2期88-92,共5页
We report on our high-contrast laser based on high-contrast, high-energy seed injection, low-gain optical para- metric chirped pulse amplification (OPCPA), and Nd:glass amplifiers, which can be used as the high-con... We report on our high-contrast laser based on high-contrast, high-energy seed injection, low-gain optical para- metric chirped pulse amplification (OPCPA), and Nd:glass amplifiers, which can be used as the high-contrast front end of a high-power Nd:glass chirped pulse amplification (CPA) laser system. The energy of the stretched 1053 nm high-contrast seed pulse increases to 60 DJ by optimizing the frequency doubling crystal in the pulse cleaning device. After passing through a two-stage low-gain OPCPA, a 2-pass 2-rod Nd:glass amplifier, and a compressor the amplified pulse of 131 mJ/282 fs is achieved. The third-order correlation scanning measurement shows that the pulse contrast in the tens of ps range is about 10^-7-10^-8. With the high-contrast seed passing through the stretcher and compressor only, the contrast measurement indicates that the stretching-compressing process leads mainly to the contrast degradation of the amplified pulse. 展开更多
关键词 amplification chirp modulation Frequency doublers GLASS Laser optics Ultrashort pulses
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