title: Phase-controlled superimposed FBGs and their applications in spectral-phase en/decoding.
abstract: 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.
authors.affiliation: Photonics Information Technology Laboratory, Institute of Communication Engineering, PLA University of Science and Technology, Nanjing, China. zhengjilinjs@126.com
authors.forename: Jilin
authors.initials: J
authors.lastname: Zheng
authors.forename: Rong
authors.initials: R
authors.lastname: Wang
authors.forename: Tao
authors.initials: T
authors.lastname: Pu
authors.forename: Lin
authors.initials: L
authors.lastname: Lu
authors.forename: Tao
authors.initials: T
authors.lastname: Fang
authors.forename: Yang
authors.initials: Y
authors.lastname: Su
authors.forename: Ling
authors.initials: L
authors.lastname: Li
authors.forename: Xiangfei
authors.initials: X
authors.lastname: Chen
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D012031:Refractometry / Q000295:instrumentation*