光子学报, 2009, 38 (2): 237, 网络出版: 2010-05-10
低阈值展宽脉冲锁模掺Er3+光纤环形激光器的实验研究
Low Threshold Stretched-pulses Mode-locked Er3+-doped Fiber Laser with Ring Cavity
低阈值 展宽脉冲 非线性偏振旋转 锁模 环形腔 Low threshold Stretched-pulse Nonlinear polarization evolution Mode-locked Ring cavity
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90 mW，而且在29 mW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175 fs,光谱半高宽为40 nm，重复频率为33 MHz的锁模脉冲输出.激光器工作稳定，光谱干净光滑.
Abstract
A low threshold stretched-pulses mode-locked Erbium-doped fiber ring cavity femtosecond laser with small positive-dispersion Er3+-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 mW.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.
白晶, 王屹山, 陈国夫, 赵卫, 杨直, 张伟, 刘红军, Claudio Porzi. 低阈值展宽脉冲锁模掺Er3+光纤环形激光器的实验研究[J]. 光子学报, 2009, 38(2): 237. BAI Jing, WANG Yi-shan, CHEN Guo-fu, ZHAO Wei, YANG Zhi, ZHANG Wei, LIU Hong-jun, CLAUDIO P. Low Threshold Stretched-pulses Mode-locked Er3+-doped Fiber Laser with Ring Cavity[J]. ACTA PHOTONICA SINICA, 2009, 38(2): 237.
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