Institute of Laser & Micro/Nano Engineering, College of Electronics & Information Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu 610064, China
Guoying Feng
Institute of Laser & Micro/Nano Engineering, College of Electronics & Information Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu 610064, China
Shenyu Dai
Institute of Laser & Micro/Nano Engineering, College of Electronics & Information Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu 610064, China
Hong Zhang
Institute of Laser & Micro/Nano Engineering, College of Electronics & Information Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu 610064, China
Wei Zhang
Institute of Laser & Micro/Nano Engineering, College of Electronics & Information Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu 610064, China
Lijuan Deng
Institute of Laser & Micro/Nano Engineering, College of Electronics & Information Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu 610064, China
Shouhuan Zhou
Institute of Laser & Micro/Nano Engineering, College of Electronics & Information Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu 610064, China
A mid-infrared (mid-IR) semiconductor saturable absorber mirror (SESAM) based on Fe2+:ZnSe for passively Q-switched Er3+-doped ZBLAN fiber laser has been demonstrated. Fe2+:ZnSe SESAM was fabricated by electron beam evaporation method. Fe2+ was innovatively doped into the reflective Bragg stack, in which ZnSe layer served as both doped matrix and high refractive layer during the fabricating process. By using the Fe2+:ZnSe SESAM, stable passively Q-switched pulses with the minimum pulse width of 0.43 μs under a repetition rate of 160.82 kHz were obtained. The recorded maximum average output power of 873 mW with a peak power of 12.59 W and pulse energy of 5.43 μJ were achieved. The results demonstrated a new method for fabricating Fe2+:ZnSe SESAM, which can be used in compact mid-IR Q-switched fiber laser.
