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

doi:10.1088/1674-1056/24/4/044208

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 (李超然), Dai Shi-Xun (戴世勋), Zhang Qin-Yuan (张勤远), Shen Xiang (沈祥), Wang Xun-Si (王训四), Zhang Pei-Qing (张培晴), Lu Lai-Wei (路来伟), Wu Yue-Hao (吴越豪), Lv She-Qin (吕社钦) Low threshold fiber taper coupled rare earth ion-doped chalcogenide microsphere laser 2015 Chin. Phys. B 24 044208

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

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