Optical mode converter integration with InP-InGaAsP active and passive waveguides using a single regrowth process

Author

Xuejin Yan ; Masanovic, M.L. ; Skogen, E.J. ; Hu, Z. ; Blumenthal, D.J. ; Coldren, L.A.

Author_Institution

Dept. of Electr. & Comput. Eng., California Univ., Santa Barbara, CA, USA

Volume

14

Issue

9

fYear

2002

Firstpage

1249

Lastpage

1251

Abstract

A new method for integration of optical mode converters with InP-based photonic integrated circuits is described and demonstrated. The mode converter is integrated to a Sampled Grating DBR (SG-DBR) laser to demonstrate integration and to facilitate accurate fiber-coupling loss measurements. The entire fabrication process requires a single MOCVD regrowth, making it compatible with low-cost integration with other photonic components. The mode converter utilizes a vertically tapered geometry and yields a record 86% coupling efficiency using a lensed, uncoated, single-mode fiber. Cleaved fiber to InP-based waveguide coupling loss sensitivity is measured to be better than 1 dB with /spl plusmn/ 1.85-μm lateral fiber misalignment and /spl plusmn/1.5-μm transversal fiber misalignment.

Keywords

III-V semiconductors; MOCVD; distributed Bragg reflector lasers; gallium arsenide; indium compounds; integrated optics; optical fibre couplers; optical fibre losses; optical waveguide components; InP; InP-InGaAsP; InP-InGaAsP active waveguides; InP-InGaAsP passive waveguides; InP-based photonic integrated circuits; cleaved fiber to waveguide coupling loss sensitivity; coupling efficiency; fiber-coupling loss measurements; lateral fiber misalignment; lensed uncoated single-mode fiber; low-cost integration compatibility; optical mode converter integration; sampled grating DBR laser; single MOCVD regrowth; single regrowth process; spot size converter; transversal fiber misalignment; vertically tapered geometry; Distributed Bragg reflectors; Fiber gratings; Fiber lasers; Integrated optics; Laser modes; Loss measurement; Optical fiber losses; Optical sensors; Optical waveguides; Photonic integrated circuits;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2002.801057

Filename

1032342