端面泵浦皮秒再生放大器  

End-Pumped Picosecond Regenerative Amplifier

作　　者：郑建奎 崔索超[1] 石锐 王密信[1] 陈炯[1] 孙峰[1] ZHENG Jian-kui;CUI Suo-chao;SHI Rui;WANG Mi-xin;CHEN Jiong;SUN Feng(Huazhong Institute of Electro-Optics—Wuhan National Laboratory for Optoelectronics,Wuhan 430223,China)

机构地区：[1]华中光电技术研究所-武汉光电国家研究中心,湖北武汉430223

出　　处：《光学与光电技术》2020年第2期78-82,共5页Optics & Optoelectronic Technology

摘　　要：Nd∶YVO4晶体一般采用808 nm激光作为泵浦源,但是其强烈的吸收导致了严重的热效应,限制了激光输出功率和光束质量。采用了吸收相对较弱的888 nm激光作为泵浦源,显著降低了Nd∶YVO4晶体在高泵浦功率下的热效应;结合自主研发的全光纤结构皮秒种子源,利用再生放大器,实现了脉冲宽度12.1 ps、重复频率100~500 k Hz、最高单脉冲能量超过250μJ的1064 nm皮秒激光输出。该再生放大器具备体积紧凑、脉冲稳定、单脉冲能量较高、转换效率较高、光束质量良好的优势,可直接或继续放大后作为超快激光加工系统的光源。The Nd∶YVO4 crystal generally applies 808 nm laser as the pumping source,but its strong absorption leads to serious thermal effect,which limits the laser output power and beam quality.In this paper,the 888 nm laser with relatively weak absorption is used as the in-band pumped source,which significantly reduces the thermal effect of Nd∶YVO4 crystal under high pump power.Combined with our self-developed all-fiber picosecond seed laser,the 1064 nm picosecond laser output with pulse width of 12.1 ps,repetition frequency of 100~500 kHz,max single-pulse energy of 250μJ is realized.The regenerative amplifier has the advantages of small size,stable pulse,high single-pulse energy,high conversion efficiency and good beam quality.It can be used as the laser source of ultrafast laser processing system or after further amplification.

关 键 词：再生放大器 端面泵浦 带内泵浦 掺钕钒酸钇 皮秒激光 

分 类 号：TN248[电子电信—物理电子学] TN722