Open AccessScalable and reconfigurable optical tapped-delay-line for multichannel equalization and correlation using nonlinear wave mixing and a Kerr frequency comb
Author(s) -
Ari N. Willner,
Peicheng Liao,
Kaiheng Zou,
Yinwen Cao,
Arne Kordts,
Maxim Karpov,
Martin H. P. Pfeiffer,
Ahmed Almaiman,
Ahmad Fallahpour,
Fatemeh Alishahi,
Karapet Manukyan,
Moshe Tur,
Tobias J. Kippenberg,
Alan E. Willner
Publication year - 2018
Publication title -
optics letters/optics index
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.524
H-Index - 272
eISSN - 1071-2763
pISSN - 0146-9592
DOI - 10.1364/ol.43.005563
Subject(s) - optics , lithium niobate , phase shift keying , multiplexing , physics , four wave mixing , frequency comb , signal (programming language) , dispersion (optics) , kerr effect , wavelength division multiplexing , nonlinear optics , nonlinear system , computer science , bit error rate , telecommunications , laser , wavelength , channel (broadcasting) , quantum mechanics , programming language
We experimentally demonstrate a scalable and reconfigurable optical tapped-delay-line (TDL) for multichannel equalization and correlation of 20-Gbaud quadrature-phase-shift-keyed (QPSK) signals using nonlinear wave mixing and a microresonator Kerr frequency comb. The optical TDL mainly consists of two stages: one being a multicasting of the original signals in a periodically poled lithium niobate (PPLN) waveguide with Kerr comb lines functioning as mutually coherent pumps, while the other is a coherent multiplexing of the delayed and weighted signal replicas in a second PPLN. A two- or three-tap optical TDL is demonstrated to simultaneously equalize a distorted QPSK data signal, reducing the error vector magnitude (EVM) from 22.5% to either 19.9% or 18.2%, and search two- or three-symbol patterns on another QPSK signal.