中国物理B ›› 2020, Vol. 29 ›› Issue (5): 54208-054208.doi: 10.1088/1674-1056/ab81f2

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

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

Du-Xin Qing(卿杜鑫), Shu-Tong Wang(王树同), Shou-Gui Ning(宁守贵), Wei Zhang(张伟), Xiao-Xu Chen(陈晓旭), Hong Zhang(张弘), Guo-Ying Feng(冯国英), Shou-Huan Zhou(周寿桓)   

  1. 1 Institute of Laser&Micro/Nano Engineering, College of Electronics&Information Engineering, Sichuan University, Chengdu 610064, China;
    2 North China Research Institute of Electro-Optics, Beijing 100015, China
  • 收稿日期:2020-01-31 修回日期:2020-03-14 出版日期:2020-05-05 发布日期:2020-05-05
  • 通讯作者: Guo-Ying Feng E-mail:guoing_feng@scu.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 11574221) and the Graduate Student's Research and Innovation Fund of Sichuan University, China (Grant No. 2018YJSY008).

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

Du-Xin Qing(卿杜鑫)1, Shu-Tong Wang(王树同)1, Shou-Gui Ning(宁守贵)1, Wei Zhang(张伟)1, Xiao-Xu Chen(陈晓旭)1, Hong Zhang(张弘)1, Guo-Ying Feng(冯国英)1, Shou-Huan Zhou(周寿桓)1,2   

  1. 1 Institute of Laser&Micro/Nano Engineering, College of Electronics&Information Engineering, Sichuan University, Chengdu 610064, China;
    2 North China Research Institute of Electro-Optics, Beijing 100015, China
  • Received:2020-01-31 Revised:2020-03-14 Online:2020-05-05 Published:2020-05-05
  • Contact: Guo-Ying Feng E-mail:guoing_feng@scu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 11574221) and the Graduate Student's Research and Innovation Fund of Sichuan University, China (Grant No. 2018YJSY008).

摘要: Fe2+:ZnSe thin films are prepared on sapphire substrate at room temperature by electron beam evaporation and then annealed in vacuum (about 1×10-4 Pa) at different temperatures. The influences of thermal annealing on the structural and optical properties of these films such as grain size and optical transmittance are investigated. The x-ray diffraction patterns show that the Fe2+:ZnSe thin film is preferred to be oriented along the (111) plane at different annealing temperatures. After the film is annealed, the full-width-at-half-maximum (FWHM ) of the x-ray diffraction peak profile (111) of the film decreases and its crystal quality is improved. Scanning electron microscope images show that the films are more dense after being annealed. Finally, the sample is used as a saturable absorber in ZBLAN fiber laser. The annealed Fe2+:ZnSe thin films can be used to realize stable Q-switching modulation on ZBLAN fiber laser. The results demonstrate that the Fe2+:ZnSe thin film is a promising material for generating the high-power pulses of mid-infrared Q-switched fiber lasers.

关键词: electron beam evaporation, thin film, optical materials, Q-switching

Abstract: Fe2+:ZnSe thin films are prepared on sapphire substrate at room temperature by electron beam evaporation and then annealed in vacuum (about 1×10-4 Pa) at different temperatures. The influences of thermal annealing on the structural and optical properties of these films such as grain size and optical transmittance are investigated. The x-ray diffraction patterns show that the Fe2+:ZnSe thin film is preferred to be oriented along the (111) plane at different annealing temperatures. After the film is annealed, the full-width-at-half-maximum (FWHM ) of the x-ray diffraction peak profile (111) of the film decreases and its crystal quality is improved. Scanning electron microscope images show that the films are more dense after being annealed. Finally, the sample is used as a saturable absorber in ZBLAN fiber laser. The annealed Fe2+:ZnSe thin films can be used to realize stable Q-switching modulation on ZBLAN fiber laser. The results demonstrate that the Fe2+:ZnSe thin film is a promising material for generating the high-power pulses of mid-infrared Q-switched fiber lasers.

Key words: electron beam evaporation, thin film, optical materials, Q-switching

中图分类号:  (Q-switching)

  • 42.60.Gd
42.70.Hj (Laser materials)