High-isolation polarization-insensitive optical circulator for advanced optical communication systems

Author

Koga, Masafumi ; Matsrnmoto, T.

Author_Institution

NTT Transmission Syst. Lab., Kanagawa, Japan

Volume

10

Issue

9

fYear

1992

fDate

9/1/1992 12:00:00 AM

Firstpage

1210

Lastpage

1217

Abstract

An optical circulator configuration that does not use polarization beam-splitters (PBSs) is described. Birefringent crystals (BCs) are used instead of PBSs to achieve a high-isolation polarization-insensitive optical circulator. The use of BCs simplifies fabrication. A conceptual configuration and two concrete structures are proposed. The prototype optical circulator was tested and exhibited over 60 dB of isolation in the wavelength range of 70 nm around 1550 nm. The insertion loss is under 1.5 dB and fluctuates only 0.2 dB with changes in the polarization state

Keywords

birefringence; light polarisation; optical communication equipment; optical isolators; optical losses; optical waveguide components; 1.3 to 1.7 dB; 1510 to 1580 nm; advanced optical communication systems; birefringent crystals; high-isolation; insertion loss; polarization state; polarization-insensitive optical circulator; Birefringence; Crystals; Optical device fabrication; Optical devices; Optical fiber communication; Optical fiber polarization; Optical mixing; Optical polarization; Optical propagation; Stimulated emission;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.156870

Filename

156870