一种高准确度光纤光栅波长解调系统

A High Precision Fiber Bragg Grating Wavelength Demodulation System

为了消除F-P滤波器的温度特性对光纤光栅波长解调系统准确度的影响,提出了一种采用F-P标准具作为波长参考计算波长的方法,设计了一种高准确度波长解调系统,并采用虚拟仪器开发平台LabWindows/CVI实现了光谱数据的滤波、寻峰及波长计算算法.测试结果表明,该系统的重复性误差小于1.56pm,稳定性误差小于1.13pm.

In order to eliminate the influence of the F-P filter temperature characteristics on the accuracy of the fiber Bragg grating wavelength demodulation system, a method is put forward that uses the F-P etalon as a wavelength reference to calculate the wavelength. A high precision fiber Bragg grating wavelength demodulation system is designed, and the algorithms for filtering, peak detecting and wavelength calculating are achieved by LabWindows/CVI. The experimental results show that the repeatability error is smaller than 1.56 pm, and the stability error is smaller than 1.13 pm.