Theoretical and experimental demonstration of phase locking technology by utilizing cubic susceptibility medium

A novel proposal for phase locking based on cubic susceptibility medium has been theoretically proposed and experimentally demonstrated. The expression for phase difference between injected waves is yielded from the coupled wave equations, which implies the phase noise can be eliminated through low-efficiency four-wave mixing (FWM). Beat-note signal and autocorrelation trace heterodyned by the injected waves with small and large detune are adopted to assess phase locking effect, and they are monitored by electrical spectrum analyzer (ESA) and autocorrelator (AC) respectively. Moreover, the influence of polarization state on phase locking is also investigated, and experimental results match well with the theoretical predictions.

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