用计算全息方法研制λ/4相移光栅时抽样点的合理选择分析  

Analysis of Suitable-Sampling Points in Fabrication of λ/4 Phase Shifted Line Grating Using Computer-Generated Holograms

作　　者：陈鹤鸣[1] 

机构地区：[1]南京邮电学院基础课部

出　　处：《南京邮电学院学报》1990年第3期42-49,共8页Journal of Nanjing University of Posts and Telecommunications(Natural Science)

摘　　要：λ/4相移光栅是研制动态单纵模DFB半导体激光器的关键元件.文献[9]提出了用计算全息方法研制λ/4相移光栅,使这种光栅的制作过程大大简化.采用这种方法时,抽样点的合理选择尤为重要.本文根据抽样定理分析了在4f系统的输入面和频谱面上抽样点如何合理选择,并给出了合理选择抽样点后研制成的相移光栅的光强分布图.In the reference[9], a new method of using computer-generated holograms(CGH)to fabricate λ/4 phase-shifted line grating (a key element of the dynamic single-mode DFB semiconductor lasers)has been proposed, and the fabricating process has been greatly simplified. It is even more important to select sampling points suitably using this new method. This paper gives the analysis in accordance with the sampling theorem, showing that how to select suitably sampling points in input-plane and spectrum-plane of a 4f-system. The intensity distribution of λ/4 phase-shifted line grating fabricated by computer-generated holograms is given.

关 键 词：相移光栅 半导体激光器 计算全息法 

分 类 号：TN248.4[电子电信—物理电子学]