Laser-to-fiber coupling via optical fiber up-tapers

Author

Presby, H.M. ; Amitay, N. ; Scotti, R. ; Benner, A.F.

Author_Institution

AT&T Bell Lab., Holmdel, NJ, USA

Volume

7

Issue

2

fYear

1989

fDate

2/1/1989 12:00:00 AM

Firstpage

274

Lastpage

278

Abstract

A method for coupling single-mode fiber to laser diodes with high efficiency and greatly reduced alignment sensitivities is discussed. It consists of a spherical ruby lens and a single-mode optical fiber up-taper. Using a double-channel planar buried heterostructure (DCPBH) laser, more than 60% of the light from the lens is coupled into a single-mode fiber via the taper. The lateral and axial tolerances of the lens-taper arrangement are reduced by factors of 20 and 1000 times, respectively, compared with laser coupling to a lensed single-mode fiber. These relaxed alignment tolerances have the potential to allow the taper to interface with a hermetically-sealed laser-lens package via a window and a connector on the package exterior

Keywords

optical couplers; optical fibres; semiconductor junction lasers; DCPBH; alignment tolerances; buried heterostructure laser; double-channel planar laser; laser diodes; laser-to-fibre coupling; optical fiber up-tapers; spherical ruby lens; Diode lasers; Fiber lasers; Hermetic seals; Laser modes; Laser stability; Lenses; Optical coupling; Optical fibers; Packaging; Semiconductor lasers;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.17767

Filename

17767