高斯拟合提高光纤布喇格光栅波长检测精度  

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

作　　者：应祥岳[1] 徐铁峰[1] 

机构地区：[1]宁波大学信息学院,宁波315211

出　　处：《激光技术》2009年第3期323-325,共3页Laser Technology

摘　　要：由于各种光噪声的影响,基于可调谐法布里-珀罗(F-P)滤波器的光栅解调仪解调精度不够高,光路噪声通常会带来10pm 量级的波长测量误差。为了提高布喇格波长检测精度,采用了在解调过程中对光纤光栅反射谱进行高斯拟合,从而消减噪声影响的方法。实验发现,拟合后中心波长的测量误差小于2.5pm,温度测量值与实际温度之间的标准方差为0.3℃。结果表明,在有害噪声信号不是非常大的情况下,该方法能有效提高波长检测精度。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 10pro 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 2.5pm 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.

关 键 词：光纤光学 布喇格波长 高斯拟合 光纤布喇格光栅 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置]