Abstract
We propose and demonstrate an all-optical phase-shift multiplier through degenerate four-wave mixing (FWM) processes. With the present approach the modulation efficiency of a phase modulator (PM) can be greatly increased through cascaded FWM stages. As an experimental example, the equivalent half-wave voltage at 1549.3 nm of a commercial PM is reduced to a quarter by using two cascaded FWM processes. Widely opened eye-diagrams and error-free demodulation results are obtained at the output of the phase-shift multiplier.
© 2010 Optical Society of America
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