TY - JOUR
T1 - Experimental demonstration of remotely controlled tunable optical correlators of 10–50 Gbaud QPSK channels using linear and nonlinear components and laser-delivered powers
AU - Alishahi, Fatemeh
AU - Minoofar, Amir
AU - Fallahpour, Ahmad
AU - Zou, Kaiheng
AU - Karapetyan, Narek
AU - Zhou, Huibin
AU - Habif, Jonathan L.
AU - Tur, Moshe
AU - Willner, Alan E.
N1 - Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2022/11/15
Y1 - 2022/11/15
N2 - 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 rates from 10 to 50 Gbaud. In the second architecture, we experimentally demonstrated a tunable optical correlator for a 10/15-Gbaud QPSK data signal using temperature-controlled nonlinear wave mixing at a remote node. A high-power pump was phase-modulated to overcome the link backscattering effect and was sent along with the signal copies to a remote correlator node through an optical fiber link. The waves generated at the output of the correlator were sent back to the transmitter for the monitoring of the operation. We showed a power boost of more than 3 dB for the correlated signal at a temperature drift of 2 °C. Using remote control and monitoring, improved constellation diagrams with lower error vector magnitudes (EVMs) for a temperature drift range of < 2 °C were obtained.
AB - 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 rates from 10 to 50 Gbaud. In the second architecture, we experimentally demonstrated a tunable optical correlator for a 10/15-Gbaud QPSK data signal using temperature-controlled nonlinear wave mixing at a remote node. A high-power pump was phase-modulated to overcome the link backscattering effect and was sent along with the signal copies to a remote correlator node through an optical fiber link. The waves generated at the output of the correlator were sent back to the transmitter for the monitoring of the operation. We showed a power boost of more than 3 dB for the correlated signal at a temperature drift of 2 °C. Using remote control and monitoring, improved constellation diagrams with lower error vector magnitudes (EVMs) for a temperature drift range of < 2 °C were obtained.
KW - Mach Zehnder Interferometer (MZI)
KW - Nonlinear wave mixing
KW - Optical correlator
KW - Optical signal processing
KW - Periodically-poled Lithium- Niobate (PPLN) waveguide
UR - http://www.scopus.com/inward/record.url?scp=85134563137&partnerID=8YFLogxK
U2 - 10.1016/j.optcom.2022.128698
DO - 10.1016/j.optcom.2022.128698
M3 - מאמר
AN - SCOPUS:85134563137
VL - 523
JO - Optics Communications
JF - Optics Communications
SN - 0030-4018
M1 - 128698
ER -