Abstract

Optical signal processing can provide high-speed operation on optical data and avoidance of optical-to-electrical-to-optical conversion. In many networking scenarios, the optical data may be encoded as quadrature-phase-shift-keying (QPSK) for spectral efficiency and noise tolerance. One signal processing function is pattern matching between two data streams, which directly compares their data patterns and can be useful for network security and improving data transmission. In this work, we experimentally demonstrate optical pattern matching between two independent QPSK data inputs using nonlinear wave mixing. The QPSK channels and their delayed copies are combined at the input of a highly nonlinear fiber (HNLF) along with a continuous wave pump. The data channels and pump undergo four-wave mixing in the HNLF to generate a 9-ary quadrature amplitude modulation (9-QAM) output. The output …

Date

September 24, 2025

Authors

Abdulrahman Alhaddad, Wing Ko, Amir Minoofar, Muralekrishnan Ramakrishnan, Huibin Zhou, Hongkun Lian, Zile Jiang, Xinzhou Su, Narek Karapetyan, Yingning Wang, Ruoyu Zeng, Ahmed Almaiman, Moshe Tur, Jonathan L Habif, Alan E Willner

Journal

Optics Letters

Volume

50

Issue

19

Pages

6125-6128

Publisher

Optica Publishing Group