Cascaded GI-fiber chips with a wedge-shaped end for the coupling between an SMF and a high-power LD with large astigmatism

Author

Yoda, Hidehiko ; Endo, Taketo ; Shiraishi, Kazuo

Author_Institution

Fac. of Eng., Utsunomiya Univ., Japan

Volume

20

Issue

8

fYear

2002

fDate

8/1/2002 12:00:00 AM

Firstpage

1545

Lastpage

1548

Abstract

A novel lensed fiber for high-efficiency coupling between a single-mode fiber (SMF) and a high-power laser diode (LD) with large astigmatism of 176 μm is proposed and demonstrated. We experimentally confirmed that the proposed lensed fiber had a minimum coupling loss of 2.5 dB including a reflection loss of 0.3 dB at both ends of the fiber. In addition the new configuration had a long working distance of 67 μm. We also investigated the tolerance characteristics for various displacements.

Keywords

aberrations; gradient index optics; lenses; optical fibre couplers; optical fibre losses; semiconductor lasers; tolerance analysis; 2.5 dB; 67 micron; cascaded graded index fiber chips; high-efficiency coupling; high-power laser diode; large astigmatism; lensed fiber; minimum coupling loss; reflection loss; single-mode fiber; tolerance characteristics; wedge-shaped end; working distance; Diode lasers; Lenses; Optical coupling; Optical fiber applications; Optical fiber devices; Optical fiber losses; Optical fibers; Optical reflection; Shape; Vision defects;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2002.800795

Filename

1058167