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Title: Study of collimating laser diode beam by a graded-index optical fibre
Authors: Wang, H.
Tay, C.J. 
Quan, C. 
Shang, H.M. 
Keywords: Collimating technique
Geometrical optics
Graded-index optical fiber
Laser diode
Issue Date: 2001
Citation: Wang, H.,Tay, C.J.,Quan, C.,Shang, H.M. (2001). Study of collimating laser diode beam by a graded-index optical fibre. Optik (Jena) 112 (11) : 531-535. ScholarBank@NUS Repository.
Abstract: 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.
Source Title: Optik (Jena)
ISSN: 00304026
Appears in Collections:Staff Publications

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