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Improved SHG phase matching response for focused Gaussian beams in Gouy compensated quasi-phase-matched structures

Improved SHG phase matching response for focused Gaussian beams in Gouy compensated quasi-phase-matched structures
Improved SHG phase matching response for focused Gaussian beams in Gouy compensated quasi-phase-matched structures
Nonlinear interactions such as second harmonic generation (SHG) [1] and sum and difference frequency generation are routinely used for the generation of laser wavelengths. With high power lasers it is necessary to use bulk crystals and tight beam focusing to achieve the maximum conversion efficiency. The use of Quasiphase-matched (QPM) materials such as PPLN and PPKTP are now routinely reported; however, as we will show in this paper, a simple linear QPM crystal does not fully optimize the conversion response. We will report theoretical and experimental results showing that by careful control of the crystal design it is possible to fully compensate for the phase errors associated with the focusing induced Gouy shift.
Major, Huw E.
b6df0066-f28b-498f-b606-bf3f4421fa94
Gates, James C.
b71e31a1-8caa-477e-8556-b64f6cae0dc2
Gawith, Corin B.E.
926665c0-84c7-4a1d-ae19-ee6d7d14c43e
Smith, Peter G.R.
8979668a-8b7a-4838-9a74-1a7cfc6665f6
Major, Huw E.
b6df0066-f28b-498f-b606-bf3f4421fa94
Gates, James C.
b71e31a1-8caa-477e-8556-b64f6cae0dc2
Gawith, Corin B.E.
926665c0-84c7-4a1d-ae19-ee6d7d14c43e
Smith, Peter G.R.
8979668a-8b7a-4838-9a74-1a7cfc6665f6

Major, Huw E., Gates, James C., Gawith, Corin B.E. and Smith, Peter G.R. (2009) Improved SHG phase matching response for focused Gaussian beams in Gouy compensated quasi-phase-matched structures. European Conference on Lasers and Electro-Optics (CLEO/Europe-EQEC), Munich, Germany. 14 - 19 Jun 2009. (doi:10.1109/CLEOE-EQEC.2009.5196520).

Record type: Conference or Workshop Item (Paper)

Abstract

Nonlinear interactions such as second harmonic generation (SHG) [1] and sum and difference frequency generation are routinely used for the generation of laser wavelengths. With high power lasers it is necessary to use bulk crystals and tight beam focusing to achieve the maximum conversion efficiency. The use of Quasiphase-matched (QPM) materials such as PPLN and PPKTP are now routinely reported; however, as we will show in this paper, a simple linear QPM crystal does not fully optimize the conversion response. We will report theoretical and experimental results showing that by careful control of the crystal design it is possible to fully compensate for the phase errors associated with the focusing induced Gouy shift.

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Published date: 14 May 2009
Venue - Dates: European Conference on Lasers and Electro-Optics (CLEO/Europe-EQEC), Munich, Germany, 2009-06-14 - 2009-06-19

Identifiers

Local EPrints ID: 78967
URI: https://eprints.soton.ac.uk/id/eprint/78967
PURE UUID: 772fc9f6-9e46-413a-bfce-240d7808faaf
ORCID for James C. Gates: ORCID iD orcid.org/0000-0001-8671-5987
ORCID for Corin B.E. Gawith: ORCID iD orcid.org/0000-0002-3502-3558

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Date deposited: 19 Mar 2010
Last modified: 20 Jul 2019 01:08

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Contributors

Author: Huw E. Major
Author: James C. Gates ORCID iD

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