低阈值展宽脉冲锁模掺Er^(3+)光纤环形激光器的实验研究(英文)  

Low Threshold Stretched-pulses Mode-locked Er^(3+)-doped Fiber Laser with Ring Cavity

作　　者：白晶[1,2] 王屹山[1] 陈国夫[1] 赵卫[1] 杨直[1] 张伟[1] 刘红军[1] Claudio Porzi 

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]中国科学院研究生院,北京100049 [3]意大利圣安娜学院,比萨56127

出　　处：《光子学报》2009年第2期237-240,共4页Acta Photonica Sinica

基　　金：Supported by National Natural Science Foundations of China(602537060,60408002)

摘　　要：将正色散值较小的掺铒光纤引入传统的环形腔构成了低阈值的展宽脉冲锁模激光器.通过使用这种掺铒光纤,激光器的锁模阈值大大降低,激光器的自起振泵浦功率仅为90mW,而且在29mW的低泵浦功率时仍然可维持稳定的锁模状态.实验中获得了脉冲宽度为175fs,光谱半高宽为40nm,重复频率为33MHz的锁模脉冲输出.激光器工作稳定,光谱干净光滑.A low threshold stretched-pulses mode-locked Erbium-doped fiber ring cavity femtosecond laser with small positive-dispersion Era＋-doped fiber was demonstrated. By introducing the small positive-dispersion fiber, the pulse energy and spectrum width were improved, the sideband of the spectrum was effectively restrained, and the self-starting pump power threshold was only 90 roW. The passive mode-locked continued to a pump power level as low as 29 mW. Self-starting mode-locked pulses with time duration of 175 fs,spectral width of 40 nm and repetition rate of 33 MHz were achieved by using this stretched-pulse configuration.

关 键 词：低阈值 展宽脉冲 非线性偏振旋转 锁模 环形腔 

分 类 号：TN248[电子电信—物理电子学]