基于光纤环形滤波器的双波长掺铒光纤激光器

何巍; 祝连庆; 董明利; 骆飞

doi:doi:10.3788/gzxb20154408.0806006

光子学报, 2015, 44 (8): 0806006, 网络出版: 2015-09-08

基于光纤环形滤波器的双波长掺铒光纤激光器

Dual-wavelength Erbium-doped Fiber Laser Based on Fiber Ring Filter

论文大纲

何巍 ^*祝连庆董明利骆飞

作者单位

北京信息科技大学光电信息与仪器北京市工程研究中心, 北京 100192

摘要

提出并设计了一种基于光纤环形滤波器的环形腔掺Er3+光纤激光器,实现了稳定的单波长和双波长激光输出.采用保偏光纤布喇格光栅作为选频器件;两支分光比为20:80 的1×2耦合器结合2 m保偏光纤构成环形滤波器,抑制模式跳变,提高激光输出稳定性,通过调节滤波器内偏振控制器实现波长选择性输出;采用长度为1m的饱和吸收体起到稳频作用.实验结果表明:该激光器工作阈值为71 mW,在熔接滤波器后,光谱特性得到改善;调节偏振控制器可实现单波长激光可切换输出或双波长激光同时输出,双波长间隔0.88 nm,1 535.5 nm和1 534.7 nm单波长切换输出时最大功率分别为0.078 dBm和-2.585 dBm,激光3 dB线宽为0.16 nm和0.15 nm;在室温20 min内,输出激光波长漂移小于0.06 nm,功率变化小于1.3 dB.

Abstract

In order to realize a dual-wavelength laser output,a ring cavtiy erbium-doped fiber laser based on fiber ring filter was proposed.In designed system configuration,one polarization maintaining-fiber Bragg grating was adopted as wavelength selector.The fiber ring filter was frabricated by two couplers with 20:80 splitting ratio and 2 m polarization maintaining fiber to constrain the mode hopping and improve the working stability,and the polarization controller inserted into the filter can be used to switch laser wavelengths.In order to guarantee the system stability,a saturable absorber of 1 m long was spliced between circulator and polarization maintaining-fiber Bragg grating.In the expriment,the working threshold is 71 mW,and the spectrum character of two lasres are improved after filter is used.The switchable single wavelength and two simultaneous wavelengths can be realized by adjusting the polarization controller,the wavelength space is 0.88 nm,and the maximum output power of single laser 1 535.5 nm and 1 534.7 nm is 0.078 dBm and -2.585 dBm,and 3 dB linewidth are 0.16 nm and 0.15 nm respectively.At room temperature,over 20 min scan time,the wavelength shifts are less than 0.06 nm ,the power fluctuation are less than 1.3 dB.

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何巍, 祝连庆, 董明利, 骆飞. 基于光纤环形滤波器的双波长掺铒光纤激光器[J]. 光子学报, 2015, 44(8): 0806006. HE Wei, ZHU Lian-qing, DONG Ming-li, LUO Fei. Dual-wavelength Erbium-doped Fiber Laser Based on Fiber Ring Filter[J]. ACTA PHOTONICA SINICA, 2015, 44(8): 0806006.

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