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Coupling-length phase matching for efficient third-harmonic generation based on parallel-coupled waveguides

Coupling-length phase matching for efficient third-harmonic generation based on parallel-coupled waveguides
Coupling-length phase matching for efficient third-harmonic generation based on parallel-coupled waveguides
We study third-harmonic generation (THG) in parallel-coupled waveguides where the spatial modulation of the mode intensity provides quasi-phase matching, called coupling-length phase matching (CLPM), for efficient nonlinear frequency conversion. Different types of CLPM are investigated for THG, and it is found that two sets of CLPM conditions can be practically implemented with traditional waveguides. These two CLPM conditions are further investigated by considering nonlinear phase modulations, which can degrade the CLPM-based THG conversion. However, up to 45% efficiency is still possible in this scheme. The greatest significance of this approach is that the requirement of perfect phase matching in a single waveguide is no longer necessary, leading to an alternative waveguide design for THG.
0146-9592
894-897
Huang, Tianye
802c90e3-cb40-4cf2-82f5-ef60d2169bf4
Shum, Perry Ping
5c669130-28f6-4b50-8568-78e05e2ce87d
Shao, Xuguang
02d0b239-e3a1-4d8c-a7cd-07670b56969d
Lee, Timothy
beb3b88e-3e5a-4c3f-8636-bb6de8040fcc
Wu, Zhifang
397f70a9-aed7-43c6-ab3c-e73303520730
Li, Huizi
1a9fc973-54a6-4eaa-8893-96e2e1d670f7
Wu, Tingting
98f97f6b-5663-4f45-9959-2b14c4f9a5b7
Zhang, Meng
ed5e0d51-9f57-41c5-95ac-328fd19e9325
Xuan, Quyen Dinh
9ebb6fb2-e915-4cca-bca3-2b7c2fb37911
Brambilla, Gilberto
815d9712-62c7-47d1-8860-9451a363a6c8
Huang, Tianye
802c90e3-cb40-4cf2-82f5-ef60d2169bf4
Shum, Perry Ping
5c669130-28f6-4b50-8568-78e05e2ce87d
Shao, Xuguang
02d0b239-e3a1-4d8c-a7cd-07670b56969d
Lee, Timothy
beb3b88e-3e5a-4c3f-8636-bb6de8040fcc
Wu, Zhifang
397f70a9-aed7-43c6-ab3c-e73303520730
Li, Huizi
1a9fc973-54a6-4eaa-8893-96e2e1d670f7
Wu, Tingting
98f97f6b-5663-4f45-9959-2b14c4f9a5b7
Zhang, Meng
ed5e0d51-9f57-41c5-95ac-328fd19e9325
Xuan, Quyen Dinh
9ebb6fb2-e915-4cca-bca3-2b7c2fb37911
Brambilla, Gilberto
815d9712-62c7-47d1-8860-9451a363a6c8

Huang, Tianye, Shum, Perry Ping, Shao, Xuguang, Lee, Timothy, Wu, Zhifang, Li, Huizi, Wu, Tingting, Zhang, Meng, Xuan, Quyen Dinh and Brambilla, Gilberto (2015) Coupling-length phase matching for efficient third-harmonic generation based on parallel-coupled waveguides. Optics Letters, 40 (6), 894-897. (doi:10.1364/OL.40.000894).

Record type: Article

Abstract

We study third-harmonic generation (THG) in parallel-coupled waveguides where the spatial modulation of the mode intensity provides quasi-phase matching, called coupling-length phase matching (CLPM), for efficient nonlinear frequency conversion. Different types of CLPM are investigated for THG, and it is found that two sets of CLPM conditions can be practically implemented with traditional waveguides. These two CLPM conditions are further investigated by considering nonlinear phase modulations, which can degrade the CLPM-based THG conversion. However, up to 45% efficiency is still possible in this scheme. The greatest significance of this approach is that the requirement of perfect phase matching in a single waveguide is no longer necessary, leading to an alternative waveguide design for THG.

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Published date: 3 March 2015
Organisations: Optoelectronics Research Centre

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Local EPrints ID: 385223
URI: https://eprints.soton.ac.uk/id/eprint/385223
ISSN: 0146-9592
PURE UUID: 143b8159-e236-4dd1-b301-342b196f23a1

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Date deposited: 12 Jan 2016 12:32
Last modified: 02 Dec 2019 20:27

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