2.4μm波段全正色散飞秒克尔透镜锁模激光器(特邀)  

Operation of femtosecond Kerr-lens mode-locked laser with all-normal dispersion at 2.4μm(Invited)

作　　者：王润雨 王庆[1,2] Wang Runyu;Wang Qing(School of Optics and Photonics,Beijing Institute of Technology,Beijing 100081,China;Key Laboratory of Photoelectronic Imaging Technology and System Ministry of Education,Beijing 100081,China)

机构地区：[1]北京理工大学光电学院,北京100081 [2]光电成像技术与系统教育部重点实验室,北京100081

出　　处：《红外与激光工程》2021年第8期43-48,共6页Infrared and Laser Engineering

基　　金：北京市自然科学基金(4172056);中央高校基本科研业务费专项资金(2021CX02058)。

摘　　要：2μm波段的飞秒激光光源在高分辨分子光谱学、中红外光学频率梳产生和超宽光谱的中红外光源产生等方面都具有重要的应用价值。Cr:ZnS/ZnSe具有很宽的发射峰,使其成为该波段产生宽光谱短脉冲中红外飞秒激光的重要材料。全正色散锁模的飞秒激光由于更容易实现较短的脉冲宽度与较高的峰值功率而受到青睐。文中在Cr:ZnS上实现全正色散条件下的克尔透镜锁模运转。在5.1 W的泵浦功率下实现波长覆盖范围2.0~2.7μm,平均功率660 m W,脉冲宽度37 fs的稳定锁模脉冲输出,这是首次在Cr:ZnS中实现全正色散锁模运转的固体激光器。Cr:ZnS全正色散锁模的飞秒激光器在高分辨分子光谱学、宽光谱中红外光光源产生等方面具有广阔的应用前景。Femtosecond laser sources operating at around 2 μm spectral range support a plethora of applications,especially in high-resolution molecule spectroscopy, synthesis of mid-infrared optical frequency combs, and broadband mid-infrared sources. Cr:ZnS/ZnSe with broad emission bands is an ideal material to support femtosecond pulse generation at around 2 μm spectral range. Femtosecond mode-locked lasers with all-normal dispersion have recently attracted great attention due to their short pulse duration and large output pulse peak power. An operation of femtosecond Kerr-lens mode-locked laser was demonstrated in Cr: ZnS with all-normal dispersion. The laser system delivered stable mode-locked pulses with pump power of 5.1 W, spectral range from 2.0 to 2.7 μm, average power of 660 m W, duration of 37 fs. It is the first time to realize the operation of femtosecond mode-locked solid laser with all-normal dispersion in Cr: ZnS, which have potential applications in high-resolution molecule spectroscopy and generation of broadband mid-infrared sources.

关 键 词：全正色散 克尔透镜锁模 Cr:ZnS 中红外飞秒激光 

分 类 号：O437.5[机械工程—光学工程]