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Tunable Mach-Zehnder polarization splitter using height-tapered Y-branches

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5 Author(s)
Hu, M.H. ; Microelectron. Sci. Lab., Columbia Univ., New York, NY, USA ; Huang, J.Z. ; Scarmozzino, R. ; Levy, M.
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A tunable TE/TM polarization splitter, based on a Mach-Zehnder interferometer with an electrooptic switch, is demonstrated in GaAs-AlGaAs. Symmetric and asymmetric Y-branches employing height-tapered waveguides are used to achieve power splitting and mode sorting, respectively, in the interferometer. The device has an extinction ratio of /spl sim/20 dB and an excess loss less than 1.5 dB for both TE and TM polarized light. The device can be reconfigured by tuning the switching voltage for operation at both 1.3- and 1.55-pm wavelengths.

Published in:

Photonics Technology Letters, IEEE  (Volume:9 ,  Issue: 6 )