Optimal distance from high power laser diode to cylindrical microlens in a coupling system

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	Optimal distance from high power laser diode to cylindrical microlens in a coupling system
	Wang Xiaowei; Ma Xiaoyu; Xiao Jianwei; Fang Gaozhan; Feng Xiaoning; Liu Yuanyuan; Liu Bin
	2003
Source Publication	Chinese Optics Letters
Volume	1 Issue:2 Pages:96-98
Abstract	In a practical coupling system, a cylindrical microlens is used to collimate the emission of a high powerlaser diode (LD) in the dimension perpendicular to the junction plane. Using passive alignment, the LD isplaced in the focus of the cylindrical microlens generally, regardless of the performance of the multimodeoptical fiber and the LD. In this paper, a more complete analysis is arrived at by ray-tracing technique,by which the angle θ of the ray after refraction is computed as a function of the angle θo of the ray beforerefraction. The focus of the cylindrical microlens is not always the optimal position of the LD. In fact, inorder to achieve a higher coupling efficiency, the optimal distance from the LD to the cylindrical microlensis dependent on not only the radius R and the index of refraction n of the cylindrical microlens, but alsothe divergence angle of the LD in the dimension perpendicular to the junction plane and the numericalaperture (NA) of the multimode optical fiber. The results of this discussion are in good agreement withexperimental results.
metadata_83	中科院半导体所国家光电子工艺中心
Subject Area	半导体器件
Indexed By	CSCD
Language	英语
CSCD ID	CSCD:1586361
Date Available	2010-11-23
Citation statistics	Cited Times:2[CSCD] [CSCD Record]
Document Type	期刊论文
Identifier	http://ir.semi.ac.cn/handle/172111/17513
Collection	中国科学院半导体研究所（2009年前）
Recommended Citation GB/T 7714	Wang Xiaowei,Ma Xiaoyu,Xiao Jianwei,et al. Optimal distance from high power laser diode to cylindrical microlens in a coupling system[J]. Chinese Optics Letters,2003,1(2):96-98.
APA	Wang Xiaowei.,Ma Xiaoyu.,Xiao Jianwei.,Fang Gaozhan.,Feng Xiaoning.,...&Liu Bin.(2003).Optimal distance from high power laser diode to cylindrical microlens in a coupling system.Chinese Optics Letters,1(2),96-98.
MLA	Wang Xiaowei,et al."Optimal distance from high power laser diode to cylindrical microlens in a coupling system".Chinese Optics Letters 1.2(2003):96-98.

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