光通信光谱分析仪波长定标方法研究

Research on Wavelength Calibration of Optical Spectrum Analyzer Using for Optical Communication

光谱分析仪(Optical Spectrum Analyzer,OSA)是光通信领域的重要测试分析仪器,主要用于测试光源、光纤光缆以及光器件的光谱特性。在介绍OSA基本原理的基础上,研究了波长精细定标方法。首先,分析了波长与采样点及探测波段之间的关系;然后基于可调谐激光器与波长计,利用最小二乘法对几个特征波长进行了定标;最后利用近红外光谱测试系统进行了验证实验。结果表明,定标后的波长准确度控制在±0.3 nm以内,满足产品指标要求。

Optical spectrum analyzer(OSA)is an important test and analysis instrument in the field of optical communication.It is mainly used for testing the spectral properties of the light sources,fibers and optical elements.On the basis of introducing the basic principle of OSA,the elaborate calibration method of the wavelength is studied.Firstly,the relationship between the wavelengths and the samples as well as the detection band is analyzed.Then the tunable laser,the wavemeter and the least square method are used to calibrate several characteristic wavelengths.Finally,the verification experiments are made by using the near-infrared spectrum test system.After the calibration,the accuracy of the wavelengths is controlled within±0.3 nm,which can meet the requirement of the specifications.