基于Bi3+Ga3+Al3+共掺高掺铒光纤的短线腔激光器

短线腔掺铒光纤激光器由环形器(OC)、自制的Bi3+Ga3+Al3+共掺高浓度掺铒光纤(BiGaAl-EDF)、均匀光纤布拉格光栅(UFBG)和波分复用器(WDM)组成。以OC作为全反射腔镜, UFBG为波长选择性部分反射腔镜, 利用1 530 nm处吸收系数为84.253 dB/m 的BiGaAl-EDF为增益介质, 室温下获得了中心波长为1 544.31 nm、边模抑制比(SMSR)大于55 dB的激光输出。分析了BiGaAl-EDF长度对激光器输出特性的影响。结果表明: 采用12 cm长的光纤实现了短线腔的窄线宽激光输出, 在25 cm长度下, 该激光器具有最小的起振阈值和最大的输出功率。测试表明, 该短线腔激光器具有线性输出特性, 并且其中心波长和输出功率不随时间的变化而发生漂移。

Abstract

A simple and effective short linear cavity erbium-doped fiber laser was presented. The laser consisted of an optical circulator(OC), a segment of self-made high concentration erbium-doped fiber co-doped with Bi3+Ga3+Al3+(BiGaAl-EDF), a uniform fiber Bragg grating(UFBG), and a wavelength division multiplexing(WDM). By using the OC as an all-reflection mirror and the UFBG written directly in the G652 fiber as a partial-reflection mirror and a wavelength selector, a stable wavelength oscillation with a center wavelength of 1 544.31 nm and a side mode suppression ratio(SMSR) of about 57 dB is achieved at room temperature. The impact of the length of BiGaAl-EDF on the laser’s output characteristic was analyzed. With a 12 cm long BiGaAl-EDF as the gain medium, the oscillation output can be realized, and the laser has the minimal oscillating threshold and the maximal output power when the length of BiGaAl-EDF is 25 cm. This laser has a linear output characteristic and its output power and center wavelength do not drift with time.

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刘志明, 刘鹏, 郑晶晶, 彭健, 刘利松, 郑斯文, 张晨芳, 简伟, 简水生. 基于Bi³⁺Ga³⁺Al³⁺共掺高掺铒光纤的短线腔激光器[J]. 强激光与粒子束, 2011, 23(2): 503. Liu Zhiming, Liu Peng, Zheng Jingjing, Peng Jian, Liu Lisong, Zheng Siwen, Zhang Chenfang, Jian Wei, Jian Shuisheng. Short linear cavity laser using high concentration erbium-doped fiber co-doped with Bi³⁺Ga³⁺Al³⁺[J]. High Power Laser and Particle Beams, 2011, 23(2): 503.

基于Bi³⁺Ga³⁺Al³⁺共掺高掺铒光纤的短线腔激光器

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