Reduction of waveguide facet reflection in optical hybrid integrated circuit using saw-toothed angled facet

Author

Ogawa, Ikuo ; Yamada, Yasufumi ; Terui, Hiroshi

Author_Institution

NTT Opto-Electron. Labs., Ibaraki, Japan

Volume

7

Issue

1

fYear

1995

Firstpage

44

Lastpage

46

Abstract

A saw-toothed facet structure is proposed to reduce the waveguide facet reflection in an optical hybrid integrated circuit. This structure was used to achieve the hybrid integration of a semiconductor laser amplifier (SLA) on a planar lightwave circuit (PLC) platform. Gain ripple for a flat facet was reduced from 3.6 dB to 0.6 dB by setting a facet angle of 35 degrees. The SLA insertion loss was 3.5 dB at 0 degrees and 4.0 dB at 35 degrees with an SLA injection current of 80 mA. Thus the sawtoothed facet is confirmed to reduce facet reflection effectively without significant insertion loss increase.<>

Keywords

hybrid integrated circuits; integrated optoelectronics; optical feedback; optical planar waveguides; semiconductor lasers; 0.6 dB; 3.5 dB; 3.6 dB; 30 mA; 4 dB; facet reflection; gain ripple; hybrid integration; injection current; insertion loss; optical hybrid integrated circuit; planar lightwave circuit platform; saw-toothed angled facet; saw-toothed facet structure; sawtoothed facet; semiconductor laser amplifier; waveguide facet reflection; Hybrid integrated circuits; Insertion loss; Integrated optics; Optical reflection; Optical waveguides; Semiconductor lasers; Semiconductor optical amplifiers; Semiconductor waveguides; Stimulated emission; Waveguide lasers;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/68.363381

Filename

363381