长周期光纤光栅光谱特性仿真研究

朱雨雨; 郗亚茹; 张亚妮; 江鹏; 薛璐; 许强

doi:10.3788/CO.2019-0152

Volume 13 Issue 3

Jun. 2020

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Chinese Optics > 2020 > 13(3): 451-458.

ZHU Yu-yu, XI Ya-ru, ZHANG Ya-ni, JIANG Peng, XUE Lu, XU Qiang. Numerical simulation of transmission spectra characterization of long-period fiber grating[J]. Chinese Optics, 2020, 13(3): 451-458. doi: 10.3788/CO.2019-0152

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ZHU Yu-yu, XI Ya-ru, ZHANG Ya-ni, JIANG Peng, XUE Lu, XU Qiang. Numerical simulation of transmission spectra characterization of long-period fiber grating[J]. Chinese Optics, 2020, 13(3): 451-458. doi: 10.3788/CO.2019-0152

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Numerical simulation of transmission spectra characterization of long-period fiber grating

doi: 10.3788/CO.2019-0152

ZHU Yu-yu^{1, 3
,},
XI Ya-ru^{1, 3},
ZHANG Ya-ni^{1, 2, 3
,
,},
JIANG Peng^{1, 3},
XUE Lu^{1, 3},
XU Qiang^{1, 3
,}

1.
School of Physics and Optoelectronics Technology, Baoji University of Arts & Science, Baoji 721016, China
2.
School of Arts and Sciences, Shaanxi University of Science & Technology, Xi’an 710021, China
3.
Baoji Engineering Technology Research Center on Ultrafast Laser and New Materials, Baoji 721016, China

Funds: Supported by National Natural Science Foundation of China (No. 11647008); International Science & Technology Cooperation and Exchanges Project of Shaanxi (No. 2018KW-16); Open Research Fund of State Key Laboratory of Transient Optics and Photonics (No. SKLST201802); Key Sciences and Technology Project of Baoji City (No. 2015CXNL-1-3); Science and Technology Project of Xianyang City (No. 2018K02-60); Key Research Project of Shaanxi University of Science & Technology (No. 2018WLXY-01-01)

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Corresponding author: yanizhang1@163.com;; xuqiang@snnu.edu.cn
Received Date: 15 Jul 2019
Rev Recd Date: 30 Aug 2019
Publish Date: 01 Jun 2020

Abstract

Abstract

Based on the coupled-mode theory, the equation for the transmission spectrum of Long Period Fiber Gratings (LPFGs) is solved by using the transmission matrix method and the relationship between the spectral characteristics of LPFGs and grating parameters (such as grating period, writing length and the depth of refractive index modulation) is simulated. The results show that the resonant wavelength of LPFGs is red-shifted with an increase in the grating period and refractive index modulation depth, and that the resonant wavelength with higher-order mode is relatively more sensitive on the grating period. At the same time, the change in the spectral bandwidth mainly depends on the writing length of the grating. The bandwidth narrows gradually with an increase in the length of the grating and over-coupling occurs when the grating length is higher than 5.2 cm. With an increase in the refractive index modulation depth, the grating has the phenomena of incomplete coupling, complete coupling and over-coupling, and the position of the maximum resonance loss will gradually transfer to the lower-order mode. The results of this research have important referential significance for the theoretical research of LPFGs and parameter designs in practical applications.
- long period fiber grating,
- the coupled-mode theory,
- transmission spectrum

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References(24)

References

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