Abstract
We experimentally demonstrated improvement in optical disc readout signal quality by homodyne detection. We introduced an optical phase servo system as an alternative to the phase-diversity detection scheme for stabilization of the interference signal in homodyne detection, which resulted in further enhancement of readout signal quality. Experimental results indicate that at least a 16-layer recordable disc can be reliably read out with a jitter of less than 8% at a 1-mW read power by homodyne detection. The estimated amplification of signal amplitude was 13 times.
© 2009 SPIE
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