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Optical predistortion enabling phase preservation in optical signal processing demonstrated in FWM-based amplitude limiter

Optical predistortion enabling phase preservation in optical signal processing demonstrated in FWM-based amplitude limiter
Optical predistortion enabling phase preservation in optical signal processing demonstrated in FWM-based amplitude limiter
We propose and demonstrate a technique to obtain phase preservation in optical processing which is suitable for many four-wave mixing (FWM) based processing devices, provided they may be modified to incorporate two conjugating FWM stages. It functions by using a first conjugating nonlinear stage to predistort the signal using self-phase modulation (SPM) such that when the signal undergoes further SPM in a second conjugating FWM stage, the two SPM contributions negate each other, resulting in phase preserving output. In this work, we use the second stage to perform amplitude squeezing through parametric gain saturation and characterise the scheme by regenerating a QPSK signal contaminated with broadband amplitude noise. Experimental analysis of the system with and without predistortion is provided and phase preserving operation using the proposed scheme is confirmed.
0733-8724
963-970
Bottrill, Kyle
8c2e6c2d-9f14-424e-b779-43c23e2f49ac
Parmigiani, Francesca
6a386833-5186-4448-875e-d691161aba62
Richardson, David
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3
Petropoulos, Periklis
522b02cc-9f3f-468e-bca5-e9f58cc9cad7
Bottrill, Kyle
8c2e6c2d-9f14-424e-b779-43c23e2f49ac
Parmigiani, Francesca
6a386833-5186-4448-875e-d691161aba62
Richardson, David
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3
Petropoulos, Periklis
522b02cc-9f3f-468e-bca5-e9f58cc9cad7

Bottrill, Kyle, Parmigiani, Francesca, Richardson, David and Petropoulos, Periklis (2017) Optical predistortion enabling phase preservation in optical signal processing demonstrated in FWM-based amplitude limiter. IEEE Journal of Lightwave Technology, 35 (4), 963-970. (doi:10.1109/JLT.2016.2604493).

Record type: Article

Abstract

We propose and demonstrate a technique to obtain phase preservation in optical processing which is suitable for many four-wave mixing (FWM) based processing devices, provided they may be modified to incorporate two conjugating FWM stages. It functions by using a first conjugating nonlinear stage to predistort the signal using self-phase modulation (SPM) such that when the signal undergoes further SPM in a second conjugating FWM stage, the two SPM contributions negate each other, resulting in phase preserving output. In this work, we use the second stage to perform amplitude squeezing through parametric gain saturation and characterise the scheme by regenerating a QPSK signal contaminated with broadband amplitude noise. Experimental analysis of the system with and without predistortion is provided and phase preserving operation using the proposed scheme is confirmed.

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Accepted/In Press date: 29 August 2016
e-pub ahead of print date: 30 August 2016
Published date: 15 February 2017
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 396183
URI: https://eprints.soton.ac.uk/id/eprint/396183
ISSN: 0733-8724
PURE UUID: dd469ce0-a8d6-435a-a7a8-c73df870f69a
ORCID for Francesca Parmigiani: ORCID iD orcid.org/0000-0001-7784-2829
ORCID for David Richardson: ORCID iD orcid.org/0000-0002-7751-1058
ORCID for Periklis Petropoulos: ORCID iD orcid.org/0000-0002-1576-8034

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Date deposited: 01 Sep 2016 08:27
Last modified: 03 Dec 2019 02:05

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