All-fiber power sensor based on silicon-germanium core fiber F-P cavity

6th conference on Advances in Optoelectronics and Micro/nano-optics

Wang, Tengjiao^1 ; Chen, Na^1 ; Zhao, Ziwen^1 ; Pang, Fufei^1 ; Chen, Zhenyi^1 ; Wang, Tingyun^1

Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Shanghai University, 149 Yanchang Road, Shanghai

200072, China^1

关键词: Conventional single-mode fibers;    Fiber Fabry-Perot;    Linear relationships;    Power detectors;    Power sensitivity;    Reflection spectra;    Silicon Germanium;    Temperature increase;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/844/1/012036/pdf
DOI  :  10.1088/1742-6596/844/1/012036

来源: IOP

【 摘 要 】

An all-optical power sensor based on silicon-germanium (SiGe) core fiber Fabry-Perot (F-P) cavity is proposed. The F-P sensor was formed by fusion splicing SiGe core fiber with conventional single-mode fiber (SMF). The 980 nm laser can be absorbed efficiently by the silicon-germanium material, resulting in the temperature increase inside the cavity, which induces the drifts of the reflection spectrum. The injected power has a very good linear relationship with the drifts experimentally, and the power sensitivity is up to 1.7 nm/mW, which may have great potential for all-fiber power detector.