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分析了光纤光栅(FBG)调谐的基本原理,进而采用新颖的调谐结构,设计并实现了一种宽带可调谐的FBG滤波器。该滤波器仅用1支FBG制做而成,其波长调谐范围最高可达40 nm。实验结果表明,该FBG滤波器的调谐波长与调谐步进位移量之间具有良好的二次曲线关系。
The basic principle of FBG tuning is analyzed, and then a novel tuning structure is adopted to design and implement a broadband tunable FBG filter. The filter is made with just one FBG and has a wavelength tuning range of up to 40 nm. Experimental results show that there is a good quadratic curve between the tuning wavelength of the FBG filter and the tuning step displacement.