Abstract

We experimentally demonstrated two enabling architectures for remotely controlled optical quadrature-phase-shift-keying (QPSK) correlators based on both linear and nonlinear elements. The correlator site was located far from the transmitter site and had no access to the local optical power. In the first demonstration, a remote correlator based on a cascade of Mach–Zehnder interferometers (MZIs) was phase-controlled through optical power sent from the transmitter via an optical fiber link. The issue of power loss because of fiber nonlinearities was further addressed by monitoring and managing the backscattered power. In this manner, the power delivered through the link was boosted by∼ 13 dB. Another∼ 6 dB gain in the delivered power was obtained by adding a second source of light power. The correlator was shown to be able to identify different target patterns within incoming QPSK signals at different baud …

Date

2022

Authors

Fatemeh Alishahi, Amir Minoofar, Ahmad Fallahpour, Kaiheng Zou, Narek Karapetyan, Huibin Zhou, Jonathan L Habif, Moshe Tur, Alan E Willner

Journal

Optics Communications

Volume

523

Pages

128698

Publisher

North-Holland