A hybrid integrated waveguide isolator on a silica-based planar lightwave circuit

Author

Sugimoto, N. ; Terui, H. ; Tate, A. ; Katoh, Y. ; Yamada, Y. ; Sugita, A. ; Shibukawa, A. ; Inoue, Y.

Author_Institution

NTT Opto-Electron. Labs., Ibaraki, Japan

Volume

14

Issue

11

fYear

1996

fDate

11/1/1996 12:00:00 AM

Firstpage

2537

Lastpage

2546

Abstract

La and Ga substituted yttrium iron garnet single-mode buried channel waveguides, prepared using liquid-phase-epitaxial growth and Ar ion beam etching, have been successfully applied as 45° nonreciprocal waveguide rotators (NRWR) for hybrid integrated waveguide isolators at λ=1.55 μm. The optical and magneto-optical properties of the prepared 45° NRWRs and the epitaxial films are investigated in detail. We describe the assembly procedure and present optical measurement results for the hybrid integrated waveguide isolators. The hybrid isolators are composed of a 45° NRWR, a half-wave plate sheet, thin film-type polarizers, a thin plate-type permanent magnet and a silica-based waveguide on a silicon substrate. We obtained good waveguide isolators with low insertion losses (<3.2 dB) and high isolation (>25 dB) in the 1.5 μm wavelength band

Keywords

garnets; integrated optics; liquid phase epitaxial growth; magnetic epitaxial layers; magneto-optical isolators; optical fabrication; optical planar waveguides; optical waveguide components; sputter etching; yttrium compounds; (La,Ga):YIG double layer film; 1.55 mum; 3.2 dB; 45° nonreciprocal waveguide rotators; Ar ion beam etching; LaYFe5O12Ga5O12; LaYIGGG; Si; Si substrate; SiO₂-Si; SiO₂-based planar lightwave circuit; assembly procedure; garnet single-mode buried channel waveguides; half-wave plate sheet; high isolation; hybrid integrated waveguide isolator; liquid-phase-epitaxial growth; low insertion loss; magneto-optical properties; optical measurement results; optical properties; thin film-type polarizers; thin plate-type permanent magnet; Garnets; Iron; Isolators; Liquid waveguides; Optical films; Optical planar waveguides; Optical waveguides; Particle beam optics; Planar waveguides; Yttrium;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.548152

Filename

548152