Tolerance analysis of aligning an astigmatic laser diode with a single-mode optical fiber

Author

Wang, L.A. ; Su, C.D.

Author_Institution

Inst. of Electro-Optical Eng., Nat. Taiwan Univ., Taipei, Taiwan

Volume

14

Issue

12

fYear

1996

fDate

12/1/1996 12:00:00 AM

Firstpage

2757

Lastpage

2762

Abstract

A general method of analyzing misalignment tolerance of coupling light from an astigmatic laser diode to a single-mode fiber is described. We apply the method to derive the 3 dB tolerances caused by longitudinal, lateral, and angular misalignments in the optimal conditions for two kinds of coupling schemes. One is by the use of a rotationally symmetric optical system, and the other by a rod which is a special case of utilizing a rotationally asymmetric optical system. In the latter coupling case, the misalignment caused by a laser is found to have a much less 3 dB tolerance in the vertical direction than that caused by a fiber

Keywords

optical couplers; optical fibre couplers; optimisation; semiconductor lasers; 3 dB tolerances; angular misalignments; astigmatic laser diode alignment; coupling schemes; lateral misalignments; longitudinal misalignments; optimal conditions; rotationally asymmetric optical system; rotationally symmetric optical system; single-mode optical fiber coupling; tolerance analysis; vertical direction; Diode lasers; Fiber lasers; Laser beams; Laser modes; Laser theory; Lenses; Optical coupling; Optical fiber communication; Optical fibers; Tolerance analysis;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.545794

Filename

545794