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Chin. Phys. B, 2015, Vol. 24(4): 044208    DOI: 10.1088/1674-1056/24/4/044208
ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS Prev   Next  

Low threshold fiber taper coupled rare earth ion-doped chalcogenide microsphere laser

Li Chao-Rana, Dai Shi-Xuna, Zhang Qin-Yuanb, Shen Xianga, Wang Xun-Sia, Zhang Pei-Qinga, Lu Lai-Weia, Wu Yue-Haoa, Lv She-Qina
a Laboratory of Infrared Material and Devices, Advanced Technology Reasearch Institute, Ningbo University, Ningbo 315211, China;
b State Key Laboratory of Luminescence Materials and Devices and Institute of Optical Communication Materials, South China University of Technology, Guangzhou 510641, China
Abstract  

We report the applications of a low-cost and environmentally friendly chalcogenide glass, 75GeS2-15Ga2S3-10CsI, in building active microsphere laser oscillators. A silica fiber taper is used as the coupling mechanism. With an 808-nm laser diode as a pump source, we show that a high-Q (~ 6×104) laser mode could be obtained from a 75-μm diameter microsphere that is coupled with a 1.77-μm waist-diameter fiber taper. The threshold of the incident pump power is 1.39 mW, which is considerably lower than those of previously reported free-space coupled chalcogenide microsphere lasers. We also note an apparent enhancement in laser power generated from this chalcogenide microsphere laser.

Keywords:  chalcogenide      microspheres      laser      whispering gallery modes  
Received:  08 July 2014      Revised:  11 October 2014      Accepted manuscript online: 
PACS:  42.70.Hj (Laser materials)  
  42.55.Sa (Microcavity and microdisk lasers)  
  42.55.Rz (Doped-insulator lasers and other solid state lasers)  
  42.82.-m (Integrated optics)  
Fund: 

Project supported by the National Natural Science Foundation of China (Grant Nos. 61177087 and 61435009), the National Key Basic Research Program of China (Grant No. 2012CB722703), the Program for Innovative Research Team of Ningbo City, China (Grant No. 2009B21007), the K. C. Wong Magna Fund in Ningbo University, the Open Fund of the State Key Laboratory of Luminescent Materials and Devices (South China University of Technology), China (Grant No. 2014-skllmd-01), and the Natural Science Foundation of Ningbo City, China (Grant No. 2014A610125).

Corresponding Authors:  Dai Shi-Xun, Wu Yue-Hao     E-mail:  daishixun@nbu.edu.cn;wuyuehao@nbu.edu.cn

Cite this article: 

Li Chao-Ran, Dai Shi-Xun, Zhang Qin-Yuan, Shen Xiang, Wang Xun-Si, Zhang Pei-Qing, Lu Lai-Wei, Wu Yue-Hao, Lv She-Qin Low threshold fiber taper coupled rare earth ion-doped chalcogenide microsphere laser 2015 Chin. Phys. B 24 044208

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