Transmission system with polarization control

Details Transmission system with polarization control Transmission system with polarization control

1995-06-07

1997-02-04

Chin, Wellington

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359110, 359156, H04B 1006, H04B 1000

Patent

active

056004745

ABSTRACT:
A transmission system having a polarization-sensitive receiver which includes polarization adaptor for changing the state of polarization of a received signal until it corresponds to an optimum polarization. For determining the direction in which the polarization should be adjusted, local signal generators produce polarization variations which influence the output signal of the polarization adaptor and the change in the signal is detected. In order to prevent slow variations in the received signal from affecting the polarization detection, a band-pass filter is included to suppress such variations.

REFERENCES:
patent: 4979235 (1990-12-01), Rumbaugh et al.
patent: 4989200 (1991-01-01), Olshansky et al.
patent: 5295013 (1994-03-01), Ouo
"Comparison of Polarization Handling Methods in Coherent Optical Systems", by R. Noe et al, Journal of Lightwave Technology, vol. 9, No. 10, Oct. 1991, pp. 1353-1366.

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