Based on Mach-Zehnder interferometer and the Fiber Bragg Grating Sagnac Loop, a new structure of photo-fiber combfilter is designed which can obtain high reflectivity and big reverberation bandwidth. This filter has the advantage of low insertion loss and the equal intervals passband. The quantity and interval of passband can be changed through the length difference of optical fiber and without having to redesign and produce the fiber grating again. Within the range of the craft allows, the reverberation bandwidth of the filter amounts to 5 nm and the reflectivity nears to the 100% which can be widely applied in optical fiber sensors and optical fiber communication fields.

Date Published: 6 August 2014
PDF: 6 pages
Proc. SPIE 9281, 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, 92810X (6 August 2014); doi: 10.1117/12.2068916

Published in SPIE Proceedings Vol. 9281:
7th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies
Li Yang; Eric Ruch; Shengyi Li, Editor(s)