11 November 2008 Ultra narrow flat-top filter based on multiple equivalent phase shifts
Author Affiliations +
Proceedings Volume 7134, Passive Components and Fiber-based Devices V; 713433 (2008) https://doi.org/10.1117/12.802483
Event: Asia-Pacific Optical Communications, 2008, Hangzhou, China
Abstract
Instead of real phase shifts, equivalent phase shifts (EPS) are adopted to construct ultra narrow phase-shifted band-pass filer in sampled Bragg gratings (SBG). Two optimized distributions of multiple equivalent phase shifts, using 2 and 5 EPSs respectively, are given in this paper to realize flat-top and ripple-free transmission characteristics simultaneously. Also two demonstrations with 5 EPSs both on hydrogen-loaded and photosensitive fibers are presented and their spectrums are examined by an optical vector analyzer (OVA). Given only ordinary phase mask and sub-micrometer precision control, ultra-narrowband flat-top filters with expected performance can be achieved flexibly and cost-effectively.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Fei Wang, Fei Wang, Xihua Zou, Xihua Zou, Zuowei Yin, Zuowei Yin, Xiangfei Chen, Xiangfei Chen, Haisong Shen, Haisong Shen, } "Ultra narrow flat-top filter based on multiple equivalent phase shifts", Proc. SPIE 7134, Passive Components and Fiber-based Devices V, 713433 (11 November 2008); doi: 10.1117/12.802483; https://doi.org/10.1117/12.802483
PROCEEDINGS
7 PAGES


SHARE
Back to Top