1 May 2014 Semiconductor saturable absorber mirror passively Q-switched 2.97 μm fluoride fiber laser
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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.
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Jianfeng Li, Jianfeng Li, Hongyu Luo, Hongyu Luo, Yulian He, Yulian He, Yong Liu, Yong Liu, Binbin Luo, Binbin Luo, Zhongyuan Sun, Zhongyuan Sun, Lin Zhang, Lin Zhang, Sergei K. Turitsyn, Sergei K. Turitsyn, "Semiconductor saturable absorber mirror passively Q-switched 2.97 μm fluoride fiber laser", Proc. SPIE 9135, Laser Sources and Applications II, 913504 (1 May 2014); doi: 10.1117/12.2053893; https://doi.org/10.1117/12.2053893


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