Polarization encoder device

Details Polarization encoder device Polarization encoder device

2006-10-24

2006-10-24

Phan, Hanh (Department: 2613)

Optical communications

Transmitter and receiver system

Including polarization

C398S045000, C398S065000, C398S079000, C359S490020, C359S490020, C356S454000, C356S491000, C356S519000

Reexamination Certificate

active

07127179

ABSTRACT:
A optical polarization encoding device (16) provides wavelength dependent processing of polychromatic optical signals without prior separation into narrow wavelength bands. Embodiments of the encoding device include a wavelength dependent tunable optical switch (400, 500) and a wavelength tunable optical level controller (600). An encoded signal is processed, (e.g., rerouted or attenuated), as a function of wavelength using polarization dependent devices (18). Desired states of polarization are imparted to optical signals to either direct selected wavelengths to selected output ports (optical switch), or to adjust the level of selected channels or wavelengths (level controller). Desired polarizations are achieved simultaneously at all wavelengths contained within the incoming signal by independently varying the birefringence and/or crystallographic orientation of each variable element within the stack.

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