合成式宽带光源光谱平坦度仿真分析

Simulation Analysis of Spectral Flatness of Synthetic Broadband Light Source

依据开发低成本光纤压力、流量等仪表的市场需求,提出一种利用有限个普通窄带光源集成为一小型宽带光源的有效方法。研究表明,采用多个满足一定条件的不同波长的普通窄带光源通过光纤耦合器的耦合,将多束光变为一束,可以使其变成一个小型宽带光源;通过调整窄带光源的内部的电流,改变输出光强,可以有效提升小型带宽光源光谱平坦度,且借助数学算法从理论上提出了小型宽带光源的光谱质量最优的判定依据;利用所获得样条拟合函数,编写程序,通过有效控制电流,能够实现自动调整单个光源输出光强;研究结果表明,应用这种新技术所开发的小型宽带光源具有制造成本低、体积小、光谱平坦度高、强度可调等特点,光谱宽度可以达到2~3nm;通过开展模拟测试证明所提出的方法是有效的。

According to the market demands of developing low-cost optical fiber pressure and flow meters,an effective method of integrating a limited number of ordinary narrow-band light sources into a small wide-band light source is proposed.Research results show that multiple narrow-band light sources with different wavelengths,which meet certain conditions,can be changed into a small broadband light source by coupling multiple optical fiber cou-plers.By adjusting the internal current of the narrow-band light source and changing the output light intensity,the spectral flatness of the small-scale broadband light source can be effectively improved.With the help of mathemati-cal algorithm,the judgment basis for the optimal spectral quality of the small broadband light source is proposed the-oretically.By using the spline fitting function,the program can be written,and the output light intensity of a single light source can be automatically adjusted by controlling the current effectively.Research results show that the small broadband light source developed by this new technology has the characteristics of low manufacturing cost,small volume,high spectral flatness and adjustable intensity,and the spectral width can reach 2-3 nm.The simula-tion testing shows that the proposed method is effective.