A fiber lens with a long working distance for integrated coupling between laser diodes and single-mode fibers

Author

Shiraishi, Kazuo ; Oyama, Naoto ; Matsumura, Kazuhito ; Ohishi, Isamu ; Suga, Shigeru

Author_Institution

Fac. of Eng., Utsunomiya Univ., Japan

Volume

13

Issue

8

fYear

1995

fDate

8/1/1995 12:00:00 AM

Firstpage

1736

Lastpage

1744

Abstract

A new scheme is proposed for lensed fibers with a long working distance, as used in the coupling between laser diodes and single-mode fibers. The scheme consists of the combination of a hemispherically-ended coreless-fiber tip and an expanded-core fiber. The working distance is measured as 169 μm with a relatively low coupling-loss of 4.2 dB at a wavelength of 1.49 μm. Tolerances for a 1-dB loss increment for axial-, lateral-, and angular-misalignment are 35, 2.6 μm, and 0.8 degrees, respectively. The new configuration is suitable for alignment-free coupling between arrayed laser diodes and an array of single-mode fibers

Keywords

lenses; optical fibre couplers; optical fibre losses; optical fibre subscriber loops; semiconductor lasers; 1.49 mum; 160 mum; 4.2 dB; alignment-free coupling; angular-misalignment; arrayed laser diodes; axial-misalignment; expanded-core fiber; fiber lens; hemispherically-ended coreless-fiber tip; integrated coupling; laser diodes; lateral-misalignment; long working distance; loss increment; low coupling-loss; single-mode fiber array; single-mode fiber coupling; Diode lasers; Lenses; Optical arrays; Optical coupling; Optical feedback; Optical fiber subscriber loops; Optical losses; Reproducibility of results; Semiconductor laser arrays; Wavelength measurement;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.405318

Filename

405318