Optimization technique for simple reconstruction of the index modulation profile of symmetric fiber Bragg gratings from their reflective spectrum

Ruitao Zheng; Nam Quoc Ngo; L. N. Binh; Swee Chuan Tjin; Ping Shum

doi:10.1117/1.2159408

1 January 2006 Optimization technique for simple reconstruction of the index modulation profile of symmetric fiber Bragg gratings from their reflective spectrum

Ruitao Zheng, Nam Quoc Ngo, L. N. Binh, Swee Chuan Tjin, Ping Shum

Author Affiliations +

Optical Engineering, Vol. 45, Issue 1, 014403 (January 2006). https://doi.org/10.1117/1.2159408

Abstract

We propose a new and simple method to reconstruct the refractive-index modulation of a symmetric fiber Bragg grating (FBG) from its magnitude reflection spectrum (i.e., phase information is not required). The reconstruction method uses an FBG model based on some known parameters of the fabricated FBG (grating length, number of subgratings, and grating period) and an optimization technique, namely, the Quasi-Newton method, to find the local parameter values of the FBG. To our knowledge, this is the first time that the reconstruction of FBG is experimentally realized by an optimization technique. Compared with other reconstruction methods, the proposed method is so simple that it requires only the reflection spectrum of the fabricated FBG.

©(2006) Society of Photo-Optical Instrumentation Engineers (SPIE)

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Ruitao Zheng, Nam Quoc Ngo, L. N. Binh, Swee Chuan Tjin, and Ping Shum "Optimization technique for simple reconstruction of the index modulation profile of symmetric fiber Bragg gratings from their reflective spectrum," Optical Engineering 45(1), 014403 (1 January 2006). https://doi.org/10.1117/1.2159408

Published: 1 January 2006

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