Simulation Study on Spectral Characteristics of FBG based on Integrated Structure of Core-and-cladding

DONG Yun-hui; HE Wei; SONG Yan-ming; MENG Fan-yong

doi:10.13756/j.gtxyj.2021.03.009

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Simulation Study on Spectral Characteristics of FBG based on Integrated Structure of Core-and-cladding

- Simulation Study on Spectral Characteristics of FBG based on Integrated Structure of Core-and-cladding
- Study on Optical Communications Issue 3, Pages: 38-42,58(2021)
- 作者机构：
  
  a.北京信息科技大学　光电测试技术及仪器教育部重点实验室，北京　100192
  b.北京信息科技大学　光纤传感与系统北京实验室，北京　100192
- 作者简介：
- 基金信息：
- DOI：10.13756/j.gtxyj.2021.03.009
  CLC： TN253
- Published：10 June 2021，
  
  Received：28 July 2020，
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DONG Yun-hui, HE Wei, SONG Yan-ming, et al. Simulation Study on Spectral Characteristics of FBG based on Integrated Structure of Core-and-cladding. [J]. Study on Optical Communications (3):38-42,58(2021)
DOI：

DONG Yun-hui, HE Wei, SONG Yan-ming, et al. Simulation Study on Spectral Characteristics of FBG based on Integrated Structure of Core-and-cladding. [J]. Study on Optical Communications (3):38-42,58(2021) DOI： 10.13756/j.gtxyj.2021.03.009.

摘要

针对纤芯包层复合结构光纤布拉格光栅（FBG）制备难度较大的问题，文章首先分析了复合结构FBG的结构特征，然后从光纤耦合模理论出发，利用Rsoft结合Matlab软件分别模拟了单独存在的纤芯、包层光栅以及复合结构光栅的反射光谱，并且通过改变光栅周期、栅区长度以及调制深度，对复合结构FBG的反射光谱特性进行了仿真分析。仿真结果表明，光栅周期为541 nm并固定其他参数时，单独的纤芯与包层光栅中心反射波长分别为1 563.4和1 558.0 nm，复合结构光栅获得了具有相同中心波长的双峰反射光谱；复合结构光栅的光栅周期、光栅长度和调制深度会对反射谱的中心波长、强度与半高宽度造成规律性的影响。研究结果可以给光栅刻写与应用提供参考与理论支撑。

Abstract

It is difficult to prepare Fiber Bragg Grating (FBG) with integrated structure of core-and-cladding. This paper first analyzes the structure characteristics of FBG with integrated structure. Based on the optical fiber coupled-mode theory

Rsoft and Matlab are used to simulate the reflection spectra of fiber cores

cladding gratings and integrated gratings respectively. The reflection spectrum characteristics of FBG with integrated structure are analyzed in the simulation with different grating period

grating length and modulation depth. The simulation results show that when the grating period is 541 nm and other parameters are fixed

the central reflection wavelength of the separate fiber core and cladding grating is 1 563.4 and 1 558.0 nm respectively

and the integrated grating can obtain the bimodal reflection spectrum with the same central wavelength. The grating period

grating length and modulation depth of the integrated grating have regular effects on the central wavelength

intensity and half high width of the reflection spectrum. The results can provide reference and theoretical support for grating writing and application.

关键词

纤芯包层复合结构光栅光纤布拉格光栅反射光谱耦合模理论仿真研究

Keywords

core-and-cladding integrated gratingFBGreflectance spectrumcoupled-mode theorysimulation study

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