Investigation of PPLN waveguide uniformity via second harmonic generation spectra
Investigation of PPLN waveguide uniformity via second harmonic generation spectra
Experimental data collection methods and a corresponding numerical model are presented to investigate the quality of waveguide fabrication in nonlinear optics. The method utilises white light interferometry and standard image recognition techniques to calculate a waveguide propagation constant function. This enables comparison of a numerical second harmonic spectrum in quasi-phasematched materials, such as periodically poled lithium niobate, with the waveguide’s experimental phase-matching spectrum. Using the presented method, a 3rd order polynomial fit to waveguide ridge width is demonstrated to be in good agreement with experimental phasematching spectra. The presented technique provides a nondestructive route to discriminate between issues in fabrication steps in nonlinear waveguide design.
Nonlinear optics, optical device fabrication, optical waveguides
63-66
Gray, Alan Ciaran
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Carpenter, Lewis Glynn
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Berry, Sam
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Gates, James
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Smith, Peter G R
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Gawith, Corin
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1 January 2020
Gray, Alan Ciaran
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Carpenter, Lewis Glynn
0daa548e-0d42-4b06-b914-45bfbec41759
Berry, Sam
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Gates, James
b71e31a1-8caa-477e-8556-b64f6cae0dc2
Smith, Peter G R
8979668a-8b7a-4838-9a74-1a7cfc6665f6
Gawith, Corin
926665c0-84c7-4a1d-ae19-ee6d7d14c43e
Gray, Alan Ciaran, Carpenter, Lewis Glynn, Berry, Sam, Gates, James, Smith, Peter G R and Gawith, Corin
(2020)
Investigation of PPLN waveguide uniformity via second harmonic generation spectra.
IEEE Photonics Technology Letters, 32 (1), , [8918460].
(doi:10.1109/LPT.2019.2957199).
Abstract
Experimental data collection methods and a corresponding numerical model are presented to investigate the quality of waveguide fabrication in nonlinear optics. The method utilises white light interferometry and standard image recognition techniques to calculate a waveguide propagation constant function. This enables comparison of a numerical second harmonic spectrum in quasi-phasematched materials, such as periodically poled lithium niobate, with the waveguide’s experimental phase-matching spectrum. Using the presented method, a 3rd order polynomial fit to waveguide ridge width is demonstrated to be in good agreement with experimental phasematching spectra. The presented technique provides a nondestructive route to discriminate between issues in fabrication steps in nonlinear waveguide design.
Text
A Gray Investigation of PPLN
- Accepted Manuscript
More information
Accepted/In Press date: 28 November 2019
e-pub ahead of print date: 2 December 2019
Published date: 1 January 2020
Keywords:
Nonlinear optics, optical device fabrication, optical waveguides
Identifiers
Local EPrints ID: 436830
URI: http://eprints.soton.ac.uk/id/eprint/436830
ISSN: 1041-1135
PURE UUID: 8f28ca21-59db-4330-9e09-b7876017bbd2
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Date deposited: 10 Jan 2020 17:34
Last modified: 17 Mar 2024 02:52
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Author:
Alan Ciaran Gray
Author:
Lewis Glynn Carpenter
Author:
Sam Berry
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