Weak reflectivity measurement of output-coupling FBG based on Fabry-Perot cavity inscribed by femtosecond laser

Qiushi Qin; Meng Wang; Binyu Rao; Zefeng Wang

doi:10.1117/12.2598963

6 June 2021 Weak reflectivity measurement of output-coupling FBG based on Fabry-Perot cavity inscribed by femtosecond laser

Qiushi Qin, Meng Wang, Binyu Rao, Zefeng Wang

Author Affiliations +

Proceedings Volume 11849, Fourth International Symposium on High Power Laser Science and Engineering (HPLSE 2021); 118490X (2021) https://doi.org/10.1117/12.2598963
Event: Fourth International Symposium on High Power Laser Science and Engineering (HPLSE 2021), 2021, Suzhou, China

Abstract

In this paper, we used a femtosecond laser direct writing system to fabricate all-fiber structure Fabry-Perot (FP) cavities based on fiber Bragg gratings (FBGs) on single-mode fibers, which was used as a scale for weak reflectivity measurement of output-coupling FBGs (OC-FBGs). By this method, the intensity of the Bragg resonance reflectivity peak of OC-FBG can be measured to be as low as ~1%. Compared with the traditional method based on the transmission spectrum, this method is much higher measurement accuracy.

Citation Download Citation

Qiushi Qin, Meng Wang, Binyu Rao, and Zefeng Wang "Weak reflectivity measurement of output-coupling FBG based on Fabry-Perot cavity inscribed by femtosecond laser", Proc. SPIE 11849, Fourth International Symposium on High Power Laser Science and Engineering (HPLSE 2021), 118490X (6 June 2021); https://doi.org/10.1117/12.2598963

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