基于平凹多通腔的非线性脉冲压缩技术  

Nonlinear pulse compression technique based on in multi-pass plano-cancave cavity

作　　者：李聘滨 滕浩[2,3] 田文龙 黄振文[4] 朱江峰 钟诗阳[2] 运晨霞 刘文军[4] 魏志义[2,3] Li Pin-Bin;Teng Hao;Tian Wen-Long;Huang Zhen-Wen;Zhu Jiang-Feng;Zhong Shi-Yang;Yun Chen-Xia;Liu Wen-Jun;Wei Zhi-Yi(School of Telecommunications Engineering,Xidian University,Xi’an 710071,China;Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China;School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China;School of Science,Beijing University of Posts and Telecommunications,Beijing 100876,China)

机构地区：[1]西安电子科技大学光电工程学院,西安710071 [2]中国科学院物理研究所,北京凝聚态物理国家研究中心,北京100190 [3]中国科学院大学物理学院,北京100049 [4]北京邮电大学理学院,北京100876

出　　处：《物理学报》2024年第12期213-220,共8页Acta Physica Sinica

基　　金：国家重点研发计划(批准号:2022YFA1604200);国家自然科学基金(批准号:12034020)资助的课题。

摘　　要：采用平凹多通腔和固体薄片组的非线性脉冲光谱展宽与压缩方案开展了100 W皮秒激光非线性脉冲压缩的研究.以多片熔融石英薄片作为非线性介质,在平凹腔中皮秒激光通过自相位调制将光谱宽度由0.24 nm展宽4.8 nm,用光栅对进行色散补偿压缩,实现压缩后的脉冲宽度为483 fs,对应压缩比为22,最终输出飞秒激光的平均功率为44.2 W.相对于常规多通腔方案,该平凹腔结构紧凑,光路稳定性好,压缩比高,非常有利于非线性光谱展宽与压缩的实现.Ultrafast femtosecond laser system with hundreds of microjoules of energy,operating at a repetition frequency of several kilohertz,has very important applications in many fields such as medicine,mid-infrared laser generation,industrial processing,and vibrational spectroscopy.The chirped pulse amplification technique provides a feasible path to obtain light sources with those parameters.However,the use of chirped pulse amplification increases the technical complexity and cost of the laser system.Recently,the proposal of a multipass cell(MPC)nonlinear pulse compression technique has enabled us to obtain high power ultrafast femtosecond pulses with reduced technical complexity and cost.The device requires only two concave mirrors and a nonlinear medium in between.In the past seven years,the multi-pass cell nonlinear pulse compression technique has made great progress,making it possible to obtain ultrashort pulses with average power of more than a few kW and peak power of tens to hundreds of TW.In this work,we achieve nonlinear pulse compression of a 100-W picosecond laser by using an improved nonlinear pulse compression scheme that combines a hybrid of a plano-cancave multi-pass cell and multi-thinplate.Using fused silica plates in plano-cancave cavity,the spectral bandwidth(FWHM)of input picosecond laser is broadened from 0.24 nm to 4.8 nm due to self-phase modulation effect,the pulse is compressed to 483 fs by dispersion compensation using grating pairs,which corresponds to a compression factor of 22,and the final output power of 44.2 W is obtained.Compared with traditional MPC,the plano-cancave cavity scheme we developed is a very promising solution for nonlinear compression due to its compactness,more stability and large compression ratio.

关 键 词：多通腔 自相位调制 非线性脉冲压缩 超快激光 

分 类 号：TN24[电子电信—物理电子学]