Generation of Carrier-Synchronized PDM Signal-Idler Pair for Polarization-Independent Phase-Sensitive Amplification

We propose an optical phase conjugator with $\chi^{(2)}$-based optical parametric amplification and multiple phase-locking loops for polarization-independent non-degenerate phase-sensitive amplification. We generate a signal-idler pair with a polarization-independent carrier phase using PPLN waveguides.