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Proceedings Paper

Research on key technologies of high precision Fiber Bragg grating demodulation system
Author(s): Xi Zhen; Dongxu Zhang
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Paper Abstract

In order to improve the accuracy of the fiber bragg grating (FBG) demodulation system and the spectral flatness of the tunable laser, a calibration scheme and flatness optimization method for effectively calibrating the etalon error are proposed. The scheme utilizes the higher temperature stability of the acetylene gas cell and The position of the standard sensor in the etalon is known, enables calculation accuracy of the etalon spectral nonlinearity error. The paper analyzes and optimizes the problem of the flatness of the tunable laser, verifies the data processing effect of the correlation filtering and calibration algorithms. The experimental results show that this paper has certain significance for the study of tunable laser flatness and related data processing schemes. The final demodulation system has an accuracy of 1 pm, the difference between the maximum optical power and the minimum optical power is less than 4dB and the flatness of tunable laser is improved by nearly 10dB compared with optimization. Related research solutions can provide reference for performance optimization of FBG demodulation systems.

Paper Details

Date Published: 18 December 2019
PDF: 8 pages
Proc. SPIE 11340, AOPC 2019: Optical Fiber Sensors and Communication, 1134011 (18 December 2019); doi: 10.1117/12.2547584
Show Author Affiliations
Xi Zhen, Beijing Aerospace Times Optical-electronic Co., Ltd. (China)
Dongxu Zhang, Beijing Aerospace Times Optical-electronic Co., Ltd. (China)


Published in SPIE Proceedings Vol. 11340:
AOPC 2019: Optical Fiber Sensors and Communication
Jie Zhang; Songnian Fu; Jun Yang, Editor(s)

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