| 摘要 |
<p>An optical receiver system for processing signals output from a polarization diversity detector that includes a plurality of photodetector cells. Each cell provides a signal that includes a phase generated carrier signal having a modulation frequency (ζ) 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).</p> |
