A practical phase sensitive amplification scheme for two channel phase regeneration

Abstract

A "black-box" phase sensitive amplifier is presented achieving simultaneous suppression of deterministic phase distortion on two independent 42.66 Gbit/s DPSK modulated signal wavelengths.

Optical Frequency Comb Generation Using Dual-Mode Injection-Locking of Quantum-Dash Mode-Locked Lasers: Properties and Applications

“…This was achieved using the synchronization scheme proposed in [27], which combined carrier extraction and frequency generation functionalities along with optical injection-locking of a local oscillator laser to create the synchronized pumps of the PSA. Recently, this scheme was extended to demonstrate the first two-channel DPSK PSA using optical injection-locking of two independent single-mode lasers [28].…”

Multi-Channel Phase Regenerator Based on Polarization-Assisted Phase-Sensitive Amplification

“…They can handle BPSK, quadrature phase shift keying (QPSK) and 16-quadrature amplitude modulation (16-QAM) signals [5][6][7][8][9][10]. However, most of the corresponding experiments so far described in the literature have accommodated a single channel and only a few attempts to simultaneously process two or more channels in a single device have been reported [9][10][11], highlighting the challenges faced when attempting to achieve multi-channel operation. This is often limited by the difficulty in isolating each underlying nonlinear interaction from the other for the various signals and the strong and undesired pump-to-pump (PtP) FWM interaction.…”

“…Information can be carried on a single wavelength using signal degenerate dual pump configurations and regeneration of up to two channels was successfully demonstrated using two scalar PSA configurations (i.e. where the two pumps were co-polarized), sharing one pump [11]. However, in that work many undesired harmonics were generated over a broad bandwidth due to the strong pump-topump (PtP) and pump-to-signal (PtS) FWM interactions between the two PSAs.…”

PSA-based all-optical multi-channel phase regenerator

“…Phase sensitive amplifiers (PSAs) based on four wave mixing (FWM) effects have been shown to be powerful tools for the processing of modern coherent signals, particularly when it comes to all-optical regeneration, with schemes capable of handling BPSK, QPSK and 16 QAM signal formats amongst others so far demonstrated [3][4][5] . However, most PSA experiments reported in the literature have supported a single channel with only a few attempts to simultaneously regenerate two or more channels in a single device 6 , highlighting the challenges faced when attempting to achieve multi-channel operation. Non-degenerate configurations (in which a signal occupies two wavelength channels to simultaneously transmit the signal and its idler, have been employed for low noise figure amplification and have been shown to be capable of amplifying up to three 16 QAM channels using a single pump and a single nonlinear medium 5 .…”

“…Although such schemes can amplify any modulation format, they sacrifice half of the transmission bandwidth (to transmit the idlers). In degenerate configurations, composed of two pumps and one wavelength channel to carry the information, regeneration of up to two channels was successfully demonstrated using two scalar PSAs, sharing one pump 6 . However, this work highlighted the limitations on the simultaneous regeneration of multiple signals imposed by the strong pump-topump (PtP) and pump-to-signal (PtS) FWM over a large bandwidth.…”