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All-optical multi-level phase quantization based on phase sensitive amplification with low-order harmonics

All-optical multi-level phase quantization based on phase sensitive amplification with low-order harmonics
All-optical multi-level phase quantization based on phase sensitive amplification with low-order harmonics
A novel scheme is proposed for all-optical multi-level phase quantization by mixing two lower-order harmonics, rather than mixing the signal with its conjugate (M−1)th harmonic, which is difficult to be generated but necessary for the traditional quantization method. The low-order harmonics used in the proposed scheme are determined as the conjugate (M/2−1)th and the (M/2+1)thharmonics for M=4n , or the conjugate (M/2−2)th and the (M/2+2)th harmonics for M=4n+2, or the conjugate [(M−1)/2]th and the [(M+1)/2]th harmonics for M=2n+1, n=1,2,3…The simulations show the effectiveness of the scheme for the eight- and nine-level all-optical phase quantization. Furthermore, the application of the scheme to the all-optical phase regeneration is validated. An improved method with two cascading stages is also proposed and validated to achieve a monotonic step-like phase–phase transfer characteristic for the optimized all-optical phase quantization. This proposed scheme provides a new way for multi-level phase quantization and multi-level phase shift keying regeneration to meet the ever increasing demand for the bandwidth in fiber optic communications.
Adaptive optics, All-optical signal processing, Harmonic analysis, Integrated optics, low-order harmonic, Optical mixing, Optical sensors, Optical signal processing, phase quantization, phase regeneration, phase sensitive amplification, phase shift keying, Quantization (signal)
0733-8724
5833-5840
Wang, Hongxiang
3a1eac03-2c41-4adf-9391-54fc1dc7e7fd
Pan, Limeng
baf25192-1d1e-4b34-a5d2-00343b6156e4
Lu, Feifei
d1fd23da-4734-4356-89e1-ad6c3143df68
Murugan, G.S.
a867686e-0535-46cc-ad85-c2342086b25b
Sun, Yongmei
43dce32e-29f5-42a7-9e12-50c059e81f48
Ji, Yuefeng
09a0dbfd-25dc-49b1-a9bb-a5a3c90adb0d
Wang, Hongxiang
3a1eac03-2c41-4adf-9391-54fc1dc7e7fd
Pan, Limeng
baf25192-1d1e-4b34-a5d2-00343b6156e4
Lu, Feifei
d1fd23da-4734-4356-89e1-ad6c3143df68
Murugan, G.S.
a867686e-0535-46cc-ad85-c2342086b25b
Sun, Yongmei
43dce32e-29f5-42a7-9e12-50c059e81f48
Ji, Yuefeng
09a0dbfd-25dc-49b1-a9bb-a5a3c90adb0d

Wang, Hongxiang, Pan, Limeng, Lu, Feifei, Murugan, G.S., Sun, Yongmei and Ji, Yuefeng (2018) All-optical multi-level phase quantization based on phase sensitive amplification with low-order harmonics. Journal of Lightwave Technology, 36 (24), 5833-5840. (doi:10.1109/JLT.2018.2879922).

Record type: Article

Abstract

A novel scheme is proposed for all-optical multi-level phase quantization by mixing two lower-order harmonics, rather than mixing the signal with its conjugate (M−1)th harmonic, which is difficult to be generated but necessary for the traditional quantization method. The low-order harmonics used in the proposed scheme are determined as the conjugate (M/2−1)th and the (M/2+1)thharmonics for M=4n , or the conjugate (M/2−2)th and the (M/2+2)th harmonics for M=4n+2, or the conjugate [(M−1)/2]th and the [(M+1)/2]th harmonics for M=2n+1, n=1,2,3…The simulations show the effectiveness of the scheme for the eight- and nine-level all-optical phase quantization. Furthermore, the application of the scheme to the all-optical phase regeneration is validated. An improved method with two cascading stages is also proposed and validated to achieve a monotonic step-like phase–phase transfer characteristic for the optimized all-optical phase quantization. This proposed scheme provides a new way for multi-level phase quantization and multi-level phase shift keying regeneration to meet the ever increasing demand for the bandwidth in fiber optic communications.

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Accepted/In Press date: 29 October 2018
e-pub ahead of print date: 7 November 2018
Published date: 15 December 2018
Keywords: Adaptive optics, All-optical signal processing, Harmonic analysis, Integrated optics, low-order harmonic, Optical mixing, Optical sensors, Optical signal processing, phase quantization, phase regeneration, phase sensitive amplification, phase shift keying, Quantization (signal)

Identifiers

Local EPrints ID: 426529
URI: http://eprints.soton.ac.uk/id/eprint/426529
ISSN: 0733-8724
PURE UUID: a330beb3-47f5-4147-8a1f-5ebe72cb164c
ORCID for G.S. Murugan: ORCID iD orcid.org/0000-0002-2733-3273

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Date deposited: 30 Nov 2018 17:30
Last modified: 18 Feb 2021 17:05

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Contributors

Author: Hongxiang Wang
Author: Limeng Pan
Author: Feifei Lu
Author: G.S. Murugan ORCID iD
Author: Yongmei Sun
Author: Yuefeng Ji

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