Polarization diversity detector mask selection algorithm

Details Polarization diversity detector mask selection algorithm Polarization diversity detector mask selection algorithm

2006-01-24

2006-01-24

Smith, Zandra V. (Department: 2877)

Optics: measuring and testing

By light interference

Having polarization

C250S227270

Reexamination Certificate

active

06989903

ABSTRACT:
A method for selecting a cell from each member of a tri-cell photodetector array used to detect optical signals output from a multichannel sensor array to indicate interference between two optical signals of unknown polarization incident upon the tri-cell photodetector array comprises selecting a cell in each tri-cell photodetector and collecting a selected number of samples of the signal output for each cell. Each sample has an in-phase AC component I and a quadrature AC component Q. An amplitude sum signal E=I*I+Q*Q is calculated for a predetermined number of samples in the selected number of samples of the signal output for each cell. The signal output of cell in each tri-cell photodetector having the largest value of the amplitude sum signal is selected for further processing.

REFERENCES:
patent: 5600474 (1997-02-01), Tomesen et al.
patent: 6134281 (2000-10-01), Green et al.
patent: 6825455 (2004-11-01), Schwarte
patent: 6825714 (2004-11-01), Greene et al.
patent: 2004/0047640 (2004-03-01), Knaack et al.

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