论文部分内容阅读
介绍了光折变全息生成的布拉格光栅由于扭曲而对波分复用应用的影响,提供了一种在器件制作前预先了解光栅扭曲对器件性能影响大小的方法。使用傅里叶分析的方法,对布拉格光栅扭曲引起的相位改变做了修正计算。对修正了相位的光栅,采用严格耦合波分析,计算了光折变全息应用于波分复用的频谱响应。并用该方法计算了不同程度的光栅扭曲造成的频谱响应变化,证明光栅扭曲会直接造成器件衍射效率下降,旁瓣增大,从而使串扰增大,是光折变全息应用于波分复用必须考虑的重要因素之一。对光折变相位光栅衍射图像数据采集的过程作了介绍,并在此基础上将记录了光栅的晶体进行波分复用损耗和串扰特性的测试,实验结果证明提供的方法能够有效预知光折变全息光栅扭曲对器件综合性能的影响。
This paper introduces the effect of Bragg grating generated by photorefractive holography on the application of WDM due to distortion, and provides a method to understand the effect of grating distortion on the device performance before the device is fabricated. Using the method of Fourier analysis, the phase change caused by Bragg grating distortion was corrected and calculated. For the grating with the phase corrected, the spectral response of the photorefractive holography used in wavelength division multiplexing is calculated using a rigorous coupled-wave analysis. The results show that the distortion of the grating will directly cause the diffraction efficiency of the device to decrease and the sidelobe increase, which leads to the increase of the crosstalk. Therefore, the application of photorefractive holography in the wavelength division multiplexing must be considered One of the important factors. The process of data acquisition of photorefractive phase grating diffraction image is introduced. On the basis of this, we record the grating’s wavelength division multiplexing loss and crosstalk characteristics. The experimental results show that the proposed method can effectively predict the photodiffraction Effect of Variable Hologram Grating Warping on Component Performance.