利用倾斜光纤光栅的结构特点和光栅中光波的耦合模方程,分析研究了倾斜光纤光栅的反射特性.模拟分析结果表明,倾斜使光栅反射谱的中心波长向长波长移动,倾角增大时,反射谱的波纹增大,带宽减小,同时时延波纹减小,色散增大.

The reflection property of the fiber tilted-grating is discussed by the structure and coupled-wave equation of the fiber tilted-grating. The simulation results shows that the center wavelength of reflection spectrum of the fiber grating is moved to long-wavelength side as tilted. As tilt angle increase, the ripple of reflection spectrum increases, bandwidth decreases, ripple of delay decreases and dispersion increases.