Differential evolution algorithms for grating parameters and spatial stress decoupling of phase-shifted fiber Bragg grating

Lijun Meng; Junjie Huo; Xinyu Li

doi:10.1117/12.2555115

12 March 2020 Differential evolution algorithms for grating parameters and spatial stress decoupling of phase-shifted fiber Bragg grating

Lijun Meng, Junjie Huo, Xinyu Li

Author Affiliations +

Proceedings Volume 11436, 2019 International Conference on Optical Instruments and Technology: Optical Sensors and Applications; 1143610 (2020) https://doi.org/10.1117/12.2555115
Event: 2019 International Conference on Optical Instruments and Technology, 2019, Beijing, China

Abstract

A separation technique for phase-shifted fiber Bragg grating(PS-FBG) physical parameters and spatial stresses based on Random-Elite Differential Evolution(RE-DE) algorithm was proposed. The cross-sensitivity problem of parameter to be measured was transformed into parameter identification of non-linear system. The specific methods adopted were as follows: measured the PS-FBG reflection spectrum under the free state as well as under different loads; constructed a theoretical PS-FBG reflection spectrum under these two states according to transfer matrix theory; established an identification model based on the difference degree between theoretical spectrum and experimental one and use RE-DE algorithm to solve the problem. Experiments showed that the proposed method had relative high identification accuracy and provided an convenient method for optical fiber parameter recognition and spatial stresses decoupling of PS-FBG.

Citation Download Citation

Lijun Meng, Junjie Huo, and Xinyu Li "Differential evolution algorithms for grating parameters and spatial stress decoupling of phase-shifted fiber Bragg grating", Proc. SPIE 11436, 2019 International Conference on Optical Instruments and Technology: Optical Sensors and Applications, 1143610 (12 March 2020); https://doi.org/10.1117/12.2555115

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