高功率单晶光纤超短脉冲放大技术研究进展(特邀)  

High Power Single Crystal Fiber Ultrashort Pulse Amplification Technology(Invited)

作　　者：曹雪 李峰[1] 赵华龙[1] 王屹山[1] 周伟[4] 沈德元 CAO Xue;LI Feng;ZHAO Hualong;WANG Yishan;ZHOU Wei;SHEN Deyuan(State Key Laboratory of Transient Optics and Photonics,Xi′an Institute of Optics and Precision Mechanics,Chinese Academy of Sciences,Xi′an 710119,China;Shaanxi Provincial Key Laboratory of Information Photonics Technology,School of Electronic Science and Engineering,Xi′an Jiaotong University,Xi′an 710049,China;University of Chinese Academy of Sciences,Beijing 100049,China;Jiangsu Key Laboratory of Advanced Laser Materials and Devices,College of Physics and Electronic Engineering,Jiangsu Normal University,Xuzhou,Jiangsu 221116,China)

机构地区：[1]中国科学院西安光学精密机械研究所瞬态光学与光子技术国家重点实验室,西安710119 [2]西安交通大学电子科学与工程学院陕西省信息光子技术重点实验室,西安710049 [3]中国科学院大学,北京100049 [4]江苏师范大学物理与电子工程学院江苏省先进激光材料与器件重点实验室,江苏徐州221116

出　　处：《光子学报》2022年第8期224-245,共22页Acta Photonica Sinica

基　　金：陕西省双链融合专项,国家自然科学基金重大项目(No.61690222);中国科学院西部之光项目(No.XAB2021YN12);陕西省科技新星项目(No.2022KJXX-98);中国科学院西安光机所所级青促会项目(No.XIOPMQCH2021007)。

摘　　要：单晶光纤具有细长的晶体结构以及对泵浦光的波导传输特性,使其兼具晶体以及光纤的激光放大介质优点,其细长的晶体结构可以有效地进行散热,保证了在高功率运转下依然可以保证高光束质量,与传统的晶体棒相比,对泵浦光的波导特性使其具有更大的能量提取效率和放大增益,简单的行波放大结构使得系统易于集成。单晶光纤作为放大增益介质已广泛应用于高功率高能量超短脉冲激光放大技术中,并在科研、工业加工等领域具有重要的应用前景。本文重点介绍了单晶光纤的结构和制备方法,以及近年来1μm波段基于单晶光纤的超短脉冲放大技术研究的主要方法及结果,包括本课题组取得的主要进展,探讨和展望了单晶光纤放大技术的前景和发展方向。Femtosecond laser with high repetition rate and high output power can be used as the driving light source of attosecond pulse generation,which can effectively increase photon flux,obtain enough experimental data quickly,and overcome the existing problem of space charge effect.Therefore,it has important application value in high order harmonics and attosecond pulse generation.At the same time,high repetition rate and high output power femtosecond pulses also have important application prospects in ultrafast laser precision micro-machining field,which can solve the technical problems of hard,brittle and soft materials processing with high-precision and high-quality“cold machining”in aviation and aerospace field.With the rapid development of ultra-fast laser processing market,high power femtosecond laser system with higher cost performance has become the major factor of concern in the industry.Compared with traditional solid-state lasers,fiber amplifiers have many characteristics,such as easy operation,all-fiber fusion,easy integration,excellent heat dissipation performance,excellent beam quality,etc.,which have attracted much attention in the field of ultra-short pulse amplification.However,limited by the mode field area of ordinary single-mode or nearly single-mode fiber,the output energy of the ultrashort pulse based on the structure of optical fiber amplifier system is limited due to the Raman scattering and stimulated brillouin scattering,the self-phase modulation,cross phase modulation and other nonlinear effect in the process of high power pulse amplification.In order to achieve high energy femtosecond pulse amplification,the current fiber amplification system mainly adopts the structure of CPA system.Before amplification,the pulse is stretched in the time domain and the special fiber with large mode area is used to achieve high energy output in the space domain.Slab,disc and other solid amplifying media can output higher pulse energy,however,they are difficult to package,and the amplification structure i

关 键 词：单晶光纤 超短脉冲 大能量 高功率 啁啾脉冲放大 

分 类 号：TN248[电子电信—物理电子学]