Design of long-period waveguide grating filter by control of waveguide cladding profile
Design of long-period waveguide grating filter by control of waveguide cladding profile
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DOI：
10.1109/jlt.2006.878499
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发表时间：
2006-09
影响因子：
4.7
通讯作者：
Qing Liu;K. Chiang
中科院分区：
文献类型：
--
作者：
Qing Liu;K. Chiang
本文介绍了一种设计长周期波导光栅滤波器的简便方法。该方法是基于控制波导包层的折射率或厚度分布沿着均匀的光栅，从而避免使用专门设计的光栅掩模。该方法的灵活性与相移光栅，啁啾光栅，和宽带滤波器的设计证明。有人发现，所需的透射特性的光栅的显着变化的折射率和厚度的变化范围内，可以很容易地实现与紫外线照射的光敏膜。该方法为实现各种光栅滤波器提供了一种强有力的途径
A simple and convenient method of designing long-period waveguide grating filters to generate sophisticated transmission characteristics is described. The method is based on controlling the index or thickness profile of the waveguide cladding along a uniform grating and thus avoids the use of specially designed grating masks. The flexibility of the method with the design of phase-shifted gratings, chirped gratings, and broadband filters is demonstrated. It was found that the index and thickness changes required for a significant change in the transmission characteristics of a grating are within the ranges that can be achieved easily with ultraviolet irradiation on photosensitive films. The method described in this paper provides a powerful approach of realizing various kinds of grating filters