基于半导体可饱和吸收镜的1550 nm被动锁模光纤激光器

刘鹏祖; 侯静; 张斌; 陈金宝

doi:doi:10.3788/cjl201138.0702017

中国激光, 2011, 38 (7): 0702017, 网络出版: 2011-06-14

基于半导体可饱和吸收镜的1550 nm被动锁模光纤激光器

1550 nm Passively Mode-Locked Fiber Laser with a Semiconductor Saturable Absorber Mirror

论文大纲

刘鹏祖 ^*侯静张斌陈金宝

作者单位

国防科学技术大学光电科学与工程学院，湖南长沙 410073

激光器被动锁模半导体可饱和吸收镜纳秒脉冲 lasers passively mode-locked semiconductor saturable absorber mirror nanosecond pulse

摘要

设计了中心波长为1550 nm的高重复频率纳秒脉冲激光器。通过在法布里-珀罗(F-P)腔内加入半导体可饱和吸收镜(SESAM)作为被动锁模器件，采用全负色散光纤作为增益介质，在未加入任何脉冲压缩机制的情况下，在抽运功率为75 mW时获得了脉宽约1 ns,重复频率为10.74 MHz的稳定锁模脉冲激光输出，光谱中心波长为1550 nm，3 dB谱宽小于0.1 nm，在抽运功率为130 mW时得到最高输出功率20.5 mW，光-光转换效率大于33%。实验表明基于SESAM被动锁模的激光器在采用全负色散光纤时能产生纳秒级脉宽、高重复频率的脉冲输出，且锁模稳定。

Abstract

A design of passively mode-locked fiber laser which can produce nanosecond pulses with high repetition frequency is presented. Inserting a semiconductor saturable absorber mirror (SESAM) in a Fabry-Perot (F-P) cavity, using all negative dispersion fiber, without any pulse compression mechanism, a pulse whose width is 1 ns and repetition frequency is 10.74 MHz is achieved at a pump power of 75 mW. The spectral analysis shows that the 3 dB width is smaller than 0.1 nm. When the pump power goes to 130 mW, a maximal power of about 20.5 mW is generated. The experiment indicates that the passively mode-locked fiber laser with an SESAM can obtain a nanosecond pulse with high repetition frequency when all negative dispersion fiber is used.

参考文献

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刘鹏祖, 侯静, 张斌, 陈金宝. 基于半导体可饱和吸收镜的1550 nm被动锁模光纤激光器[J]. 中国激光, 2011, 38(7): 0702017. Liu Pengzu, Hou Jing, Zhang Bin, Chen Jinbao. 1550 nm Passively Mode-Locked Fiber Laser with a Semiconductor Saturable Absorber Mirror[J]. Chinese Journal of Lasers, 2011, 38(7): 0702017.

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