Waveguide polarization-independent optical circulator

We fabricated a new type of waveguide polarization-independent optical circulator which does not need a polarization-beam splitter. The circulator is based on a non-reciprocal Mach-Zehnder interferometer which consists of two waveguide Faraday rotators, two thin-film half-waveplates and two planar l...

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Bibliographic Details
Published in:IEEE photonics technology letters 1999-03, Vol.11 (3), p.355-357
Main Authors: Sugimoto, N., Shintaku, T., Tate, A., Terui, H., Shimokozono, M., Kubota, E., Ishii, M., Inoue, Y.
Format: Article
Language:English
Subjects:
Circuits
Circulation
Couplers
Devices
Insertion loss
Integrated optics
Mach-Zehnder interferometers
Noise levels
Optical interferometry
Optical losses
Optical planar waveguides
Optical polarization
Optical waveguides
Photonics
Planar waveguides
Thin film circuits
Waveguides
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Summary:We fabricated a new type of waveguide polarization-independent optical circulator which does not need a polarization-beam splitter. The circulator is based on a non-reciprocal Mach-Zehnder interferometer which consists of two waveguide Faraday rotators, two thin-film half-waveplates and two planar lightwave circuit-type 3-dB couplers. The fabricated circulator provides a 14.0-23.7-dB isolation and a 3.0-3.3 dB insertion loss at /spl lambda/=1.55 μm. This circulator presents a new possibility for developing non-reciprocal devices in the field of integrated optics.
ISSN:1041-1135
1941-0174
DOI:10.1109/68.748233