Open AccessPhase-controlled superimposed FBGs and their applications in spectral-phase en/decoding
Author(s) -
Jilin Zheng,
Rong Wang,
Tao Pu,
Lin Lü,
Tao Fang,
Yang Su,
Ling Li,
Xiangfei Chen
Publication year - 2011
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.19.008580
Subject(s) - optics , encoder , fiber bragg grating , decoding methods , phase (matter) , materials science , sampling (signal processing) , computer science , optical fiber , physics , telecommunications , detector , quantum mechanics , operating system
A novel kind of superimposed fiber Bragg gratings (SI-FBGs) named SI-sampled FBGs (SI-SFBGs) is proposed to control the phase relationship among SI sub-gratings by modulating the sampling periods. The realization of such phase-controlled SI-SFBGs just needs a single uniform phase mask and sub-micrometer precision moving stage. The success of phase-controll is expected to encourage SI-SFBGs' applications in more sophisticated fields. As a demonstration, their applications in spectral-phase en/decoding are testified by both simulation and experiment. The spectral-phase encoded (SPE) encoders with the longest code-length that FBG-based SPE encoders can achieve, i.e., 64-frequency bins, are experimentally fabricated for the first time. The results show the advantages accompanying the SI-SFBGs-based SPE encoders compared with the traditional methods.