Study of collimating laser diode beam by a graded-index optical fibre

被引：1
|
作者：
Wang, H. [1 ]
Tay, C.J. [1 ]
Quan, C. [1 ]
Shang, H.M. [1 ]
机构：
[1] Department of Mechanical Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260, Singapore
来源：
| 2001年 / Wissenschaftliche Verlagsesellschaft mbH卷 / 112期
关键词：
Geometrical optics - Gradient index optics - Light propagation - Optical collimators - Optical fibers - Optical testing - Semiconductor lasers;
D O I：
10.1078/0030-4026-00092
中图分类号：
学科分类号：
摘要：
This paper presents a technique for collimating a diverging beam from a laser diode using a graded-index multimode optical fibre. The theory of the method and some experimental results are presented. Based on geometrical optics, the light propagation formula in the graded-index optical fibre is developed and then the length of the fibre for collimating is determined. The experimental results demonstrate that a laser beam of a large angle of divergence (in the range of 10° to 35°) can be reduced to a fully collimated beam with an angle of divergence of less than 0.04°. The integrated device that consists of the laser diode and graded-index fibre can be used as a light source for optical testing.
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