Sideband-assisted phase sensitive amplifiers with high phase sensitivity for efficient phase regeneration

Francesca R. Parmigiani, Graham Hesketh, Kyle R. H. Bottrill +4 more

We review our recent results on different configurations of phase sensitive amplifiers that achieve all-optical phase regeneration and optical phase quantization at low nonlinear phase shifts.

Mingyi Gao, Takashi Inoue, Takayuki Kurosu +1 more

We have clarified a mechanism that sidebands entailed by phase sensitive amplification significantly increase gain extinction ratio, by scrutinizing the trajectories of the output signal vector in the complex plane with increasing nonlinear phase shift.

David John Richardson

Mingyi Gao, Takashi Inoue, Takayuki Kurosu +1 more

We show that sidebands entailed by phase sensitive amplification significantly increase the parametric de-amplification. The resultant gain extinction ratio was 30 dB with less than 22-dBm pump power, which enables an efficient phase regenerator.

Mingyi Gao, Takayuki Kurosu, Karen Solis-Trapala +2 more

High gain extinction ratio and stable control of the phase in phase sensitive amplification are fundamental to realize either phase regeneration or quadrature squeezing of phase modulated signals in an efficient and robust manner. In this paper, we show that a combination of our previously demonstrated “sideband-assisted” dual-pump phase sensitive amplifier with a gain extinction ratio of more than 25dB, and a phase-locked loop based stabilization technique, enable efficient QPSK quadrature squeezing. Its stable operation is exploited to realize phase de-multiplexing of QPSK signals into BPSK tributaries. The phase de-multiplexed signals are evaluated through measurement of constellation diagrams, eye diagrams and more importantly, BER curves. The de-multiplexed BPSK signals exhibited an OSNR penalty of less than 1dB compared to the back-to-back BPSK signals.

A. Metelmann, Olivia Lanes, Tzu-Chiao Chien +7 more