Virtually Noiseless Phase Sensitive Amplifier Using Χ2 in AlGaAs with 30 Db Gain

The first χ 2 -based AlGaAs pulsed PSA with substantial confinement. This PSA achieves on chip in-phase gain of 30 dB, a sensitivity of 0.005 photons per pulse, and approaches the genuine quantum noise figure (NF) of 0 dB in near single mode operation for all degrees of freedom.