Demonstration of QPSK data correlation and equalization using a tunable optical tapped delay line based on orbital angular momentum mode delays

Ahmed Almaiman; Hao Song; Amir Minoofar; Haoqian Song; Runzhou Zhang; Xinzhou Su; Kaiheng Zou; Kai Pang; Cong Liu; Peicheng Liao; Nanzhe Hu; Zhe Zhao; Shlomo Zach; Moshe Tur; Alan E. Willner

doi:10.1016/j.optcom.2021.127438

Demonstration of QPSK data correlation and equalization using a tunable optical tapped delay line based on orbital angular momentum mode delays

Ahmed Almaiman, Hao Song, Amir Minoofar, Haoqian Song, Runzhou Zhang, Xinzhou Su, Kaiheng Zou, Kai Pang, Cong Liu, Peicheng Liao, Nanzhe Hu, Zhe Zhao, Shlomo Zach, Moshe Tur, Alan E. Willner

School of Electrical Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

We demonstrate a tunable optical tapped delay line (OTDL) using delays based on orbital angular momentum (OAM) modes to perform data correlation and equalization for a quadrature phase-shift-keyed (QPSK) signal. The system: (i) creates N signal replicas as N taps on different OAM modes through mode multicasting, (ii) tunes the complex tap weights (i.e., amplitude and phase of the modes), (iii) applies a tunable mode-dependent delay to each replica, and (iv) coherently combines the taps in order to realize the OTDL functions of correlation and equalization. The experiment results: (i) identify the correlation occurrence of a sequence of 2 or 3 symbols in an incoming 10 or 20 Gbaud QPSK signal, and (ii) equalize the distortion caused by chromatic dispersion for a 20-Gbaud QPSK data signal and reduce error vector magnitude (EVM) from ∼25.4 to ∼12.9%.

Original language	English
Article number	127438
Journal	Optics Communications
Volume	503
DOIs	https://doi.org/10.1016/j.optcom.2021.127438
State	Published - 15 Jan 2022

Keywords

Fiber optics
Fourier optics
Signal processing

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10.1016/j.optcom.2021.127438

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Almaiman, A., Song, H., Minoofar, A., Song, H., Zhang, R., Su, X., Zou, K., Pang, K., Liu, C., Liao, P., Hu, N., Zhao, Z., Zach, S., Tur, M., & Willner, A. E. (2022). Demonstration of QPSK data correlation and equalization using a tunable optical tapped delay line based on orbital angular momentum mode delays. Optics Communications, 503, [127438]. https://doi.org/10.1016/j.optcom.2021.127438

@article{696397021baf439ea33ca7019d53d31d,

title = "Demonstration of QPSK data correlation and equalization using a tunable optical tapped delay line based on orbital angular momentum mode delays",

abstract = "We demonstrate a tunable optical tapped delay line (OTDL) using delays based on orbital angular momentum (OAM) modes to perform data correlation and equalization for a quadrature phase-shift-keyed (QPSK) signal. The system: (i) creates N signal replicas as N taps on different OAM modes through mode multicasting, (ii) tunes the complex tap weights (i.e., amplitude and phase of the modes), (iii) applies a tunable mode-dependent delay to each replica, and (iv) coherently combines the taps in order to realize the OTDL functions of correlation and equalization. The experiment results: (i) identify the correlation occurrence of a sequence of 2 or 3 symbols in an incoming 10 or 20 Gbaud QPSK signal, and (ii) equalize the distortion caused by chromatic dispersion for a 20-Gbaud QPSK data signal and reduce error vector magnitude (EVM) from ∼25.4 to ∼12.9%.",

keywords = "Fiber optics, Fourier optics, Signal processing",

author = "Ahmed Almaiman and Hao Song and Amir Minoofar and Haoqian Song and Runzhou Zhang and Xinzhou Su and Kaiheng Zou and Kai Pang and Cong Liu and Peicheng Liao and Nanzhe Hu and Zhe Zhao and Shlomo Zach and Moshe Tur and Willner, {Alan E.}",

note = "Publisher Copyright: {\textcopyright} 2021 Elsevier B.V.",

year = "2022",

month = jan,

day = "15",

doi = "10.1016/j.optcom.2021.127438",

language = "אנגלית",

volume = "503",

journal = "Optics Communications",

issn = "0030-4018",

publisher = "Elsevier",

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Almaiman, A, Song, H, Minoofar, A, Song, H, Zhang, R, Su, X, Zou, K, Pang, K, Liu, C, Liao, P, Hu, N, Zhao, Z, Zach, S, Tur, M & Willner, AE 2022, 'Demonstration of QPSK data correlation and equalization using a tunable optical tapped delay line based on orbital angular momentum mode delays', Optics Communications, vol. 503, 127438. https://doi.org/10.1016/j.optcom.2021.127438

TY - JOUR

T1 - Demonstration of QPSK data correlation and equalization using a tunable optical tapped delay line based on orbital angular momentum mode delays

AU - Almaiman, Ahmed

AU - Song, Hao

AU - Minoofar, Amir

AU - Song, Haoqian

AU - Zhang, Runzhou

AU - Su, Xinzhou

AU - Zou, Kaiheng

AU - Pang, Kai

AU - Liu, Cong

AU - Liao, Peicheng

AU - Hu, Nanzhe

AU - Zhao, Zhe

AU - Zach, Shlomo

AU - Tur, Moshe

AU - Willner, Alan E.

PY - 2022/1/15

Y1 - 2022/1/15

N2 - We demonstrate a tunable optical tapped delay line (OTDL) using delays based on orbital angular momentum (OAM) modes to perform data correlation and equalization for a quadrature phase-shift-keyed (QPSK) signal. The system: (i) creates N signal replicas as N taps on different OAM modes through mode multicasting, (ii) tunes the complex tap weights (i.e., amplitude and phase of the modes), (iii) applies a tunable mode-dependent delay to each replica, and (iv) coherently combines the taps in order to realize the OTDL functions of correlation and equalization. The experiment results: (i) identify the correlation occurrence of a sequence of 2 or 3 symbols in an incoming 10 or 20 Gbaud QPSK signal, and (ii) equalize the distortion caused by chromatic dispersion for a 20-Gbaud QPSK data signal and reduce error vector magnitude (EVM) from ∼25.4 to ∼12.9%.

AB - We demonstrate a tunable optical tapped delay line (OTDL) using delays based on orbital angular momentum (OAM) modes to perform data correlation and equalization for a quadrature phase-shift-keyed (QPSK) signal. The system: (i) creates N signal replicas as N taps on different OAM modes through mode multicasting, (ii) tunes the complex tap weights (i.e., amplitude and phase of the modes), (iii) applies a tunable mode-dependent delay to each replica, and (iv) coherently combines the taps in order to realize the OTDL functions of correlation and equalization. The experiment results: (i) identify the correlation occurrence of a sequence of 2 or 3 symbols in an incoming 10 or 20 Gbaud QPSK signal, and (ii) equalize the distortion caused by chromatic dispersion for a 20-Gbaud QPSK data signal and reduce error vector magnitude (EVM) from ∼25.4 to ∼12.9%.

KW - Fiber optics

KW - Fourier optics

KW - Signal processing

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VL - 503

JO - Optics Communications

JF - Optics Communications

SN - 0030-4018

M1 - 127438

ER -

Demonstration of QPSK data correlation and equalization using a tunable optical tapped delay line based on orbital angular momentum mode delays

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