Highly Efficient Self-Starting Femtosecond Cr：Forsterite Laser  

作　　者：周斌斌 张永东 钟欣 魏志义 

机构地区：[1]Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190

出　　处：《Chinese Physics Letters》2008年第10期3679-3681,共3页中国物理快报（英文版）

基　　金：Supported by National Natural Science Foundation of China under Grant Nos 60490281 and 60621063, and the National Basic Research Programme of China under Grant No 2007CB815104.

摘　　要：We report a highly efficient and high power self-starting femtosecond Cr：forsterite laser pumped by a 1064-nm Yb doped fibre laser. Five chirped mirrors are used to compensate for the intra-cavity group-delay dispersion, and the mode-locking is initiated by a semiconductor saturable absorber mirror （SESAM）. Under pump power of 7.9 W, stable femtosecond laser pulses with average power of 760mW are obtained, yielding a pump power slope efficiency of 12.3%. The measured pulse duration and spectral bandwidth （FWHM） are 46 fs and 45 nm; the repetition rate is 82 MHz.We report a highly efficient and high power self-starting femtosecond Cr：forsterite laser pumped by a 1064-nm Yb doped fibre laser. Five chirped mirrors are used to compensate for the intra-cavity group-delay dispersion, and the mode-locking is initiated by a semiconductor saturable absorber mirror （SESAM）. Under pump power of 7.9 W, stable femtosecond laser pulses with average power of 760mW are obtained, yielding a pump power slope efficiency of 12.3%. The measured pulse duration and spectral bandwidth （FWHM） are 46 fs and 45 nm; the repetition rate is 82 MHz.

关 键 词：the power-law exponents precipitation durative abrupt precipitation change 

分 类 号：TN248[电子电信—物理电子学]