相移光纤光栅透射光谱特性研究

基于模耦合理论,利用传输矩阵法系统地分析了相移光纤光栅的透射谱特点.结果表明,相移光栅可在透射谱阻带中打开线宽极窄的一个或多个透射窗口,通过对相移光栅在不同相移量、不同位置、不同相移个数、不同kL值时的传输光谱特性进行分析研究,得到了影响其透射率以及其线宽和位置的主要因素.这些结果将对相移光纤光栅在滤波、波分复用、光纤激光器和光纤光栅传感系统的实际制作及应用有重要的指导意义.

Transmission spectrum of the shifted fibre bragg grating

The transmission spectrum of the shifted fibre bragg grating was analyzed systematically based on the coupled-mode theory with an the transfer matrix method.It showed that in the transmission spectrum of the shifted fibre bragg grating,there was one or multiple transmission windowed with an extreme narrowing line width.The spectra characteristics of shifted fibre grating analyzed with the conditions of different phase-shift magnitude,different location of the phase-shift,different phase-shifts number and different KL of the grating.These results are useful for the producing and applications of shifted fibre bragg grating in filtering,wavelength division multiplex,fibre laser and fibre grating sensor systems.