A systematic study of PPLN length dependence in intracavity SHG

Abstract In this paper, a systematic study of the relationship between nonlinear crystal length and intracavity second-harmonic generation (SHG) using MgO-doped periodically-poled lithium niobate (MgO:PPLN) is presented. The experimental results demonstrate a relationship between the maximum SHG pow...

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Autores principales:	Tyler Kashak, Liam Flannigan, Chang-qing Xu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/3d30f18284c747589f646fa51227e3b6
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spelling	oai:doaj.org-article:3d30f18284c747589f646fa51227e3b62021-11-21T12:18:23ZA systematic study of PPLN length dependence in intracavity SHG10.1038/s41598-021-01699-02045-2322https://doaj.org/article/3d30f18284c747589f646fa51227e3b62021-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-01699-0https://doaj.org/toc/2045-2322Abstract In this paper, a systematic study of the relationship between nonlinear crystal length and intracavity second-harmonic generation (SHG) using MgO-doped periodically-poled lithium niobate (MgO:PPLN) is presented. The experimental results demonstrate a relationship between the maximum SHG power generated and the full-width at half maximum (FWHM) of the crystal’s temperature tuning curve to the length of the nonlinear optical crystal. It was shown that maximum SHG power increases rapidly with the increase of MgO:PPLN length, reaching a saturation length (~ 2 mm), which is much shorter than that predicted by the single-pass SHG theory. This saturation length of the MgO:PPLN crystal is almost independent on 808 nm pump power for typical powers used in continuous wave intracavity SHG lasers. In addition to this saturation effect, a broadening effect was also observed, the FWHM of the temperature tuning curve was shown to have a larger FWHM than that predicted by the single-pass SHG theory for MgO:PPLN shorter than the saturation length. This work has the benefit of allowing engineers to optimize nonlinear crystal length when developing intracavity SHG based diode-pumped solid state (DPSS) lasers.Tyler KashakLiam FlanniganChang-qing XuNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Tyler Kashak Liam Flannigan Chang-qing Xu A systematic study of PPLN length dependence in intracavity SHG
description	Abstract In this paper, a systematic study of the relationship between nonlinear crystal length and intracavity second-harmonic generation (SHG) using MgO-doped periodically-poled lithium niobate (MgO:PPLN) is presented. The experimental results demonstrate a relationship between the maximum SHG power generated and the full-width at half maximum (FWHM) of the crystal’s temperature tuning curve to the length of the nonlinear optical crystal. It was shown that maximum SHG power increases rapidly with the increase of MgO:PPLN length, reaching a saturation length (~ 2 mm), which is much shorter than that predicted by the single-pass SHG theory. This saturation length of the MgO:PPLN crystal is almost independent on 808 nm pump power for typical powers used in continuous wave intracavity SHG lasers. In addition to this saturation effect, a broadening effect was also observed, the FWHM of the temperature tuning curve was shown to have a larger FWHM than that predicted by the single-pass SHG theory for MgO:PPLN shorter than the saturation length. This work has the benefit of allowing engineers to optimize nonlinear crystal length when developing intracavity SHG based diode-pumped solid state (DPSS) lasers.
format	article
author	Tyler Kashak Liam Flannigan Chang-qing Xu
author_facet	Tyler Kashak Liam Flannigan Chang-qing Xu
author_sort	Tyler Kashak
title	A systematic study of PPLN length dependence in intracavity SHG
title_short	A systematic study of PPLN length dependence in intracavity SHG
title_full	A systematic study of PPLN length dependence in intracavity SHG
title_fullStr	A systematic study of PPLN length dependence in intracavity SHG
title_full_unstemmed	A systematic study of PPLN length dependence in intracavity SHG
title_sort	systematic study of ppln length dependence in intracavity shg
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/3d30f18284c747589f646fa51227e3b6
work_keys_str_mv	AT tylerkashak asystematicstudyofpplnlengthdependenceinintracavityshg AT liamflannigan asystematicstudyofpplnlengthdependenceinintracavityshg AT changqingxu asystematicstudyofpplnlengthdependenceinintracavityshg AT tylerkashak systematicstudyofpplnlengthdependenceinintracavityshg AT liamflannigan systematicstudyofpplnlengthdependenceinintracavityshg AT changqingxu systematicstudyofpplnlengthdependenceinintracavityshg
_version_	1718419058201722880

A systematic study of PPLN length dependence in intracavity SHG

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