Polarization state converter

Details Polarization state converter Polarization state converter

1994-11-23

1996-02-20

Healy, Brian

Optical waveguides

Polarization without modulation

385 14, 385 15, 385 27, 385 28, 359483, 359494, 359497, G02B 600

Patent

active

054936241

ABSTRACT:
An integrated optics polarization state converter comprises optically in series a first TM.sub.0 to TM.sub.1 mode converter that is substantially transparent to TE.sub.0, a concatenation of total internal reflectors and a second TM.sub.0 to TM.sub.1 converter, similarly substantially transparent to TE.sub.0, which is connected the way round so as to operate as a TM.sub.1 to TM.sub.0 converter. Each TM.sub.0 to TM.sub.1 converter may comprise a tandem arrangement of a 2.times.2 TE.sub.0 /TM.sub.0 polarization beam splitting coupler and a mismatched, 3 dB maximum, 2.times.2 beam splitting coupler. The place of the TM.sub.0 to TM.sub.1 converters substantially transparent to TE.sub.0 may be taken by TE.sub.0 to TE.sub.1 converters substantially transparent to TM.sub.0.

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Albrecht et al., "Polarization Converter and Splitter for a Coherent Receiver Optical Network on InP", IEEE Colloquium Polarization Effects, Oct. 22, 1990, pp. 9/1-9/3.

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