Experimental utilization of repeated spatial-mode shifting for achieving discrete delays in a free-space recirculating loop

Ahmed Almaiman; Zhe Zhao; Yinwen Cao; Guodong Xie; Amirhossein Mohajerin-Ariaei; Fatemeh Alishahi; Peicheng Liao; Changjing Bao; Ahmad Fallahpour; Bishara Shamee; Youichi Akasaka; Shlomo Zach; Nadav Cohen; Moshe Tur; Alan E. Willner

doi:10.1364/OL.43.005395

Experimental utilization of repeated spatial-mode shifting for achieving discrete delays in a free-space recirculating loop

Ahmed Almaiman^*, Zhe Zhao, Yinwen Cao, Guodong Xie, Amirhossein Mohajerin-Ariaei, Fatemeh Alishahi, Peicheng Liao, Changjing Bao, Ahmad Fallahpour, Bishara Shamee, Youichi Akasaka, Shlomo Zach, Nadav Cohen, Moshe Tur, Alan E. Willner

^*Corresponding author for this work

School of Electrical Engineering

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

Abstract

We demonstrate an optical recirculating delay loop by shifting the spatial mode order of orbital-angular-momentum (OAM) beams in the free-space. The desired delay can be selected at the loop output by exploiting the orthogonality of the OAM modes. When sending a 20-Gbaud quadrature-phase-shift-keyed (QPSK) signal through the delay system, three recirculations are demonstrated, each with an additional delay of 2.2 ns. Around 0.5 and 2 dB system penalties are measured for the second and third recirculations, respectively. We also simulate the performance of our approach under different scenarios.

Original language	English
Pages (from-to)	5395-5398
Number of pages	4
Journal	Optics Letters
Volume	43
Issue number	21
DOIs	https://doi.org/10.1364/OL.43.005395
State	Published - 1 Nov 2018

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Almaiman, A., Zhao, Z., Cao, Y., Xie, G., Mohajerin-Ariaei, A., Alishahi, F., Liao, P., Bao, C., Fallahpour, A., Shamee, B., Akasaka, Y., Zach, S., Cohen, N., Tur, M., & Willner, A. E. (2018). Experimental utilization of repeated spatial-mode shifting for achieving discrete delays in a free-space recirculating loop. Optics Letters, 43(21), 5395-5398. https://doi.org/10.1364/OL.43.005395

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title = "Experimental utilization of repeated spatial-mode shifting for achieving discrete delays in a free-space recirculating loop",

abstract = "We demonstrate an optical recirculating delay loop by shifting the spatial mode order of orbital-angular-momentum (OAM) beams in the free-space. The desired delay can be selected at the loop output by exploiting the orthogonality of the OAM modes. When sending a 20-Gbaud quadrature-phase-shift-keyed (QPSK) signal through the delay system, three recirculations are demonstrated, each with an additional delay of 2.2 ns. Around 0.5 and 2 dB system penalties are measured for the second and third recirculations, respectively. We also simulate the performance of our approach under different scenarios.",

author = "Ahmed Almaiman and Zhe Zhao and Yinwen Cao and Guodong Xie and Amirhossein Mohajerin-Ariaei and Fatemeh Alishahi and Peicheng Liao and Changjing Bao and Ahmad Fallahpour and Bishara Shamee and Youichi Akasaka and Shlomo Zach and Nadav Cohen and Moshe Tur and Willner, {Alan E.}",

note = "Publisher Copyright: {\textcopyright} 2018 Optical Society of America.",

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doi = "10.1364/OL.43.005395",

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Almaiman, A, Zhao, Z, Cao, Y, Xie, G, Mohajerin-Ariaei, A, Alishahi, F, Liao, P, Bao, C, Fallahpour, A, Shamee, B, Akasaka, Y, Zach, S, Cohen, N, Tur, M & Willner, AE 2018, 'Experimental utilization of repeated spatial-mode shifting for achieving discrete delays in a free-space recirculating loop', Optics Letters, vol. 43, no. 21, pp. 5395-5398. https://doi.org/10.1364/OL.43.005395

TY - JOUR

T1 - Experimental utilization of repeated spatial-mode shifting for achieving discrete delays in a free-space recirculating loop

AU - Almaiman, Ahmed

AU - Zhao, Zhe

AU - Cao, Yinwen

AU - Xie, Guodong

AU - Mohajerin-Ariaei, Amirhossein

AU - Alishahi, Fatemeh

AU - Liao, Peicheng

AU - Bao, Changjing

AU - Fallahpour, Ahmad

AU - Shamee, Bishara

AU - Akasaka, Youichi

AU - Zach, Shlomo

AU - Cohen, Nadav

AU - Tur, Moshe

AU - Willner, Alan E.

PY - 2018/11/1

Y1 - 2018/11/1

N2 - We demonstrate an optical recirculating delay loop by shifting the spatial mode order of orbital-angular-momentum (OAM) beams in the free-space. The desired delay can be selected at the loop output by exploiting the orthogonality of the OAM modes. When sending a 20-Gbaud quadrature-phase-shift-keyed (QPSK) signal through the delay system, three recirculations are demonstrated, each with an additional delay of 2.2 ns. Around 0.5 and 2 dB system penalties are measured for the second and third recirculations, respectively. We also simulate the performance of our approach under different scenarios.

AB - We demonstrate an optical recirculating delay loop by shifting the spatial mode order of orbital-angular-momentum (OAM) beams in the free-space. The desired delay can be selected at the loop output by exploiting the orthogonality of the OAM modes. When sending a 20-Gbaud quadrature-phase-shift-keyed (QPSK) signal through the delay system, three recirculations are demonstrated, each with an additional delay of 2.2 ns. Around 0.5 and 2 dB system penalties are measured for the second and third recirculations, respectively. We also simulate the performance of our approach under different scenarios.

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SN - 0146-9592

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SP - 5395

EP - 5398

JO - Optics Letters

JF - Optics Letters

IS - 21

ER -

Experimental utilization of repeated spatial-mode shifting for achieving discrete delays in a free-space recirculating loop

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