Influences of annealing temperature on properties of Fe<sup>2+</sup>:ZnSe thin films deposited by electron beam evaporation and their applications to <i>Q</i>-switched fiber laser

Influences of annealing temperature on properties of Fe²⁺:ZnSe thin films deposited by electron beam evaporation and their applications to Q-switched fiber laser

Qing Du-Xin¹, Wang Shu-Tong¹, Ning Shou-Gui¹, Zhang Wei¹, Chen Xiao-Xu¹, Zhang Hong¹, Feng Guo-Ying^{1, †}, Zhou Shou-Huan^{1, 2}

Typical Q-switched pulse trains at output power of (a) 316 mW, (b) 660 mW, (c) single pulse waveform, and (d) average output power varying with pump powers.