TE/TM mode splitters on InGaAsP/InP

In a monolithic heterodyne polarization diversity receiver, mode splitters which effectively separate the TE and TM polarization of the optical wave are required. For this purpose, a directional coupler which utilizes a metal cladding on one of its branches to separate both polarizations was investi...

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Bibliographic Details
Published in:IEEE photonics technology letters 1990-02, Vol.2 (2), p.114-115
Main Authors: Albrecht, P., Hamacher, M., Heidrich, H., Hoffmann, D., Nolting, H., Weinert, C.M.
Format: Article
Language:English
Subjects:
360603 - Materials- Properties
426002 - Engineering- Lasers & Masers- (1990-)
440600 - Optical Instrumentation- (1990-)
ARSENIC COMPOUNDS
ARSENIDES
CONTROL
ENGINEERING
GALLIUM ARSENIDES
GALLIUM COMPOUNDS
INDIUM ARSENIDES
INDIUM COMPOUNDS
Indium phosphide
INDIUM PHOSPHIDES
MATERIALS SCIENCE
Metallization
MODE CONTROL
Optical crosstalk
Optical mixing
Optical polarization
OPTICAL PROPERTIES
Optical receivers
Optical refraction
OPTICAL SYSTEMS
Optical variables control
Optical waveguides
OTHER INSTRUMENTATION
PHOSPHIDES
PHOSPHORUS COMPOUNDS
PHYSICAL PROPERTIES
PNICTIDES
POLARIZATION
WAVEGUIDES
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Summary:In a monolithic heterodyne polarization diversity receiver, mode splitters which effectively separate the TE and TM polarization of the optical wave are required. For this purpose, a directional coupler which utilizes a metal cladding on one of its branches to separate both polarizations was investigated. The polarization splitters can act in two distinct modes of operation, depending on the degree of lateral confinement of the optical rib waveguide before an asymmetric coupler. For weak confinement, the metallized waveguide is guiding for TE- but nonguiding for TM-polarization, and negligible TM-crosstalk results.< >
ISSN:1041-1135
1941-0174
DOI:10.1109/68.47064