Semiconductor saturable absorber mirror passively Q-switched 2.97 μm fluoride fiber laser
Semiconductor saturable absorber mirror passively Q-switched 2.97 μm fluoride fiber laser
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DOI：
10.1117/12.2053893
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发表时间：
2014-04
影响因子：
1.7
通讯作者：
Jianfeng Li;Hongyu Luo;Yulian He;Y. Liu;Binbin Luo;Zhongyuan Sun;Lin Zhang;S. Turitsyn
中科院分区：
文献类型：
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作者：
Jianfeng Li;Hongyu Luo;Yulian He;Y. Liu;Binbin Luo;Zhongyuan Sun;Lin Zhang;S. Turitsyn
采用反向设计的宽带半导体可饱和镜（SESAM）实现了二极管包层泵浦的中红外被动调Q掺Ho 3+氟化物光纤激光器。SESAM的非线性反射率使用内部掺Yb 3+锁模光纤激光器在1062 nm处测量。相对于发射的泵浦功率，在12.1%的斜率效率下产生稳定的脉冲序列。在重复频率为47.6 kHz、中心波长为2.971 µm的条件下，获得了最大脉冲能量为6.65 µJ、脉冲宽度为1.68 µs、信噪比约为50 dB的激光输出。据我们所知，这是第一个基于SESAM的3 µm区域调Q光纤激光器，具有最高的平均功率和脉冲能量，以及中红外被动调Q氟化物光纤激光器的最长波长。
A diode-cladding-pumped mid-infrared passively Q-switched Ho3+-doped fluoride fiber laser using a reverse designed broad band semiconductor saturable mirror (SESAM) was demonstrated. Nonlinear reflectivity of the SESAM was measured using an in-house Yb3+-doped mode-locked fiber laser at 1062 nm. Stable pulse train was produced at a slope efficient of 12.1% with respect to the launched pump power. Maximum pulse energy of 6.65 µJ with a pulse width of 1.68 µs and signal-to-noise ratio (SNR) of ~50 dB was achieved at a repetition rate of 47.6 kHz and center wavelength of 2.971 µm. To the best of our knowledge, this is the first 3 µm region SESAM-based Q-switched fiber laser with the highest average power and pulse energy, as well as the longest wavelength from mid-infrared passively Q-switched fluoride fiber lasers.