High-Resolution Fiber Laser Sensor System

Hao, 肖浩 Xiao; Fang, 李芳 Li; Yongjie, 王永杰 Wang; Lihui, 刘丽辉 Liu; Yuliang, 刘育梁 Liu

doi:10.3788/cjl20083501.0087

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“…However, high power laser output requires a relatively longer cavity. In this case, there should exist some optimal cavity length to ensure single-longitudinalmode operation and maximum output power at the same time [7] . Hence, the research on the cavity length of the DBR fiber laser is of great theoretical and practical significance.…”

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confidence: 99%

Dbr光纤激光器有效腔长测量新方法

Ji¹,

Xiurong²,

Sun³

et al. 2010

中国光学快报

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A novel method to measure the effective cavity length of distributed Bragg reflector (DBR) fiber laser with fiber Bragg grating (FBG) Fabry-Pérot cavity as the resonator is proposed. The effective cavity length of DBR fiber laser is accurately measured by measuring the frequency spacing of two adjacent longitudinal modes in the cavity without the precise physical length of FBGs. The measuring accuracy as high as 10 −5 mm can be obtained by setting the resolution bandwidth of the spectrum analyzer.

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confidence: 99%