发明名称 |
Multi-channel optical receiver for processing tri-cell polarization diversity detector outputs |
摘要 |
An optical receiver system for processing signals output from a polarization diversity detector that includes a plurality of photodetector cells. Each cell provides an signal that includes a phase generated carrier signal having a modulation frequency omega and a sensor signal that has an in-phase component I and a quadrature phase component Q superimposed on the phase generated carrier signal. A plurality of variable gain amplifiers are arranged to produce a plurality of amplified signals. A feedback circuit is connected to the plurality of variable gain amplifiers for controlling the gains thereof. A plurality of demodulator circuits are arranged to receive the amplified signals. The demodulator circuits are arranged to provide for each photodetector cell an I signal output that indicates an amplitude of the in-phase component I and a Q signal output that indicates an amplitude of the quadrature phase component Q.
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申请公布号 |
US7095963(B2) |
申请公布日期 |
2006.08.22 |
申请号 |
US20030333939 |
申请日期 |
2003.01.23 |
申请人 |
LITTON SYSTEMS, INC. |
发明人 |
KNAACK WILLIAM CHRISTOPHER;DOUGLASS, IV JOHN THOMSON;FERRARO EUGENE LOUIS |
分类号 |
H04B10/06;H04B10/148 |
主分类号 |
H04B10/06 |
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