The investigation of the parameter choice of the nonlinearly chirped FBG
Abstract
Purpose
Correctly choosing the nonlinearly chirped fiber Bragg grating (NLCFBG) parameter is very important, which may instruct the effective manufacture grating. The purpose of this paper is to analyze some kinds of curve reflection spectrums and time delays of the FBG.
Design/methodology/approach
In this paper, some kinds of curve reflection spectrums and time delays of the FBG are analyzed. The paper makes the numerical simulation of the spectrum character and time delay about some kinds of FBG. The relation between the modulation intensity and linear chirp coefficient c1 of the FBG is studied for the first time. The transformation of the curve about time delay is compared at different modulation intensity.
Findings
The authors investigate the number of dots which is used to draw a graph of the spectrum character and time delay, and is found that the graph of the spectrum character and time delay is broken off when the graphed number of dots is too less. Also, the authors study the reflection spectrum of the NLCFBG, when the segment number M of NLCFBG is less, the graph of reflection spectrum of the NLCFBG is fuzz.
Research limitations/implications
Attention should be paid to coordination among the parameters of the NLCFBG.
Practical implications
The paper provides very useful advice for highly efficient production of the gratings.
Originality/value
The following new viewpoint is proposed: the longer the length of the NLCFBG, the smaller its numerical value of the NLCFBG parameters c1, c2 and modulation intensity. This paper is aimed at guiding the correct production of the gratings.
Keywords
Citation
Xianjie, F., Shengqian, W. and Daowen, Z. (2010), "The investigation of the parameter choice of the nonlinearly chirped FBG", Kybernetes, Vol. 39 No. 6, pp. 915-924. https://doi.org/10.1108/03684921011046681
Publisher
:Emerald Group Publishing Limited
Copyright © 2010, Emerald Group Publishing Limited