Improvement of measurement precision of fiber Bragg grating wavelength by means of Gaussian fitting

YING Xiang-yue; XU Tie-feng

The measurement precision of the fiber Bragg grating demodulator with a Fabry-Perot filter is not high enough because of noise.This light noise always leads to about lOpm of wavelength measurement error.Gaussian fitting of the reflected spectrum was proposed to eliminate the noise and improve the demodulation precision.Experiments proved that the wavelength error was less than 2.5 pm by means of Gaussian fitting when the standard deviation of the temperature was 0.3℃.It is proved by experiments that Gaussian fitting can be used to improve the wavelength measurement precision if there is not high noise in the system.

1. Faculty of Information Science and Engineering, Ningbo University, Ningbo 315211, China

Received Date: 2008-03-10

Accepted Date: 2008-05-05

Available Online: 2009-06-25

Abstract: The measurement precision of the fiber Bragg grating demodulator with a Fabry-Perot filter is not high enough because of noise.This light noise always leads to about lOpm of wavelength measurement error.Gaussian fitting of the reflected spectrum was proposed to eliminate the noise and improve the demodulation precision.Experiments proved that the wavelength error was less than 2.5 pm by means of Gaussian fitting when the standard deviation of the temperature was 0.3℃.It is proved by experiments that Gaussian fitting can be used to improve the wavelength measurement precision if there is not high noise in the system.

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Reference (10)

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Improvement of measurement precision of fiber Bragg grating wavelength by means of Gaussian fitting

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