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Proceedings Paper

Application of Levenberg-Marquardt algorithm in the Brillouin spectrum fitting
Author(s): Chuankai Zhang; Yuanhong Yang; Anqi Li
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Paper Abstract

Brillouin distributed optical fiber sensing system based on spontaneous Brillouin scattering frequency shift measurement may measure temperature in the optical fiber, due to the dependence of spontaneous Brillouin scattering frequency shift on temperature. In this paper, nonlinear theoretical models of the Brillouin spectrum in the BOTDR temperature sensing system are analyzed. The model parameters are optimized with Levenberg-Marquardt algorithm. By numerical calculation, it is indicated that pseudo-Voigt function can approach approximated the Voigt profile well and quickly.

Paper Details

Date Published: 13 October 2008
PDF: 7 pages
Proc. SPIE 7129, Seventh International Symposium on Instrumentation and Control Technology: Optoelectronic Technology and Instruments, Control Theory and Automation, and Space Exploration, 71291Y (13 October 2008); doi: 10.1117/12.807646
Show Author Affiliations
Chuankai Zhang, Beijing Univ. of Aeronautics and Astronautics (China)
Yuanhong Yang, Beijing Univ. of Aeronautics and Astronautics (China)
Anqi Li, Beijing Univ. of Aeronautics and Astronautics (China)


Published in SPIE Proceedings Vol. 7129:
Seventh International Symposium on Instrumentation and Control Technology: Optoelectronic Technology and Instruments, Control Theory and Automation, and Space Exploration

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