Generation of few-cycle multi-millijoule 2.5 μm pulses from a single-stage Cr2+:ZnSe amplifier

Generation of few-cycle multi-millijoule 2.5 μm pulses from a single-stage Cr2+:ZnSe amplifier
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从单级 Cr2 :ZnSe 放大器生成几个周期的多毫焦耳 2.5 μm 脉冲

DOI:
10.1038/s41598-020-64330-8
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发表时间:
2020
期刊:
影响因子:
4.6
通讯作者:
Chang, Zenghu
Chang, Zenghu
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Wu, Yi;Zhou, Fangjie;Larsen, Esben W.;Zhuang, Fengjiang;Yin, Yanchun;Chang, Zenghu

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能够通过高次谐波产生在水窗(282至533 eV)中产生阿秒X射线脉冲的激光器通常基于由飞秒或皮秒激光器泵浦的低效的多级光学参量放大器或光学参量啁啾脉冲放大器。本文报道了一种基于传统啁啾脉冲放大的单级放大激光器,它能产生4mJ、近变换极限的44fs(<6个周期)、1kHz、中心波长为2.5μm的脉冲。90 GW的峰值功率是该波长有史以来达到的最高值。为了充分压缩激光脉冲,我们的系统内置在氮气箱中。我们的系统采用水冷掺铬硒化锌(Cr 2+:ZnSe)作为增益介质,并由商业纳秒掺钬钇铝石榴石(Ho:YAG)激光器泵浦。
Lasers capable of generating attosecond X-ray pulses in the water window (282 to 533 eV) through high-order harmonic generation are normally based on inefficient, multi-stage optical parametric amplifiers or optical parametric chirped pulse amplifiers pumped by femtosecond or picosecond lasers. Here we report a very efficient single amplification stage laser based on traditional chirped pulse amplification capable of producing 4 mJ, near-transform limited 44 fs (<6 cycles), 1 kHz pulses centered at 2.5μm. The ≈90 GW peak power is the highest value ever reached at this wavelength. In order to fully compress the laser pulses our system is built in a nitrogen box. Our system utilizes water cooled chromium doped zinc selenide (Cr2+:ZnSe) as the gain medium and is pumped by a commercial nanosecond holmium doped yttrium-aluminum-garnet (Ho:YAG) laser.
多毫焦耳、基于再生放大器的啁啾脉冲放大器系统的载波包络相位稳定。
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发表时间: 2009
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影响因子: 3.8
作者:
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发表时间: 2019
期刊: Laser Congress 2019 (ASSL, LAC, LS&C)
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