High efficiency cascaded third-harmonic generation in a quasi-periodically poled KTiOPO4 crystal

Augustin Vernay; Lucas Bonnet-Gamard; Véronique Boutou; Sivan Trajtenberg-Mills; Ady Arie; Benoît Boulanger

doi:10.1364/OSAC.395084

High efficiency cascaded third-harmonic generation in a quasi-periodically poled KTiOPO₄ crystal

Augustin Vernay, Lucas Bonnet-Gamard, Véronique Boutou, Sivan Trajtenberg-Mills, Ady Arie, Benoît Boulanger^*

^*Corresponding author for this work

Université Grenoble Alpes

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

We performed and studied cascaded third-harmonic generation (THG) in a quasi-periodically poled KTP (QPPKTP) crystal allowing simultaneous phase-matching of the two cascading steps ω + ω → 2ω and 2ω + ω → 3ω. The phase-matching was achieved at the fundamental wavelength λ_ω = 1587 nm when the QPPKTP crystal was heated to 95°C. The energy conversion efficiency reached 40% in the picosecond regime for a fundamental energy of 20 µJ that corresponds to an intensity of 1.5 GW/cm². It is the highest value of THG efficiency ever reported to the best of our knowledge. The modeling in the case of the depleted pump regime accurately described the experiments.

Original language	English
Pages (from-to)	1536-1544
Number of pages	9
Journal	OSA Continuum
Volume	3
Issue number	6
DOIs	https://doi.org/10.1364/OSAC.395084
State	Published - 15 Jun 2020

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abstract = "We performed and studied cascaded third-harmonic generation (THG) in a quasi-periodically poled KTP (QPPKTP) crystal allowing simultaneous phase-matching of the two cascading steps ω + ω → 2ω and 2ω + ω → 3ω. The phase-matching was achieved at the fundamental wavelength λω = 1587 nm when the QPPKTP crystal was heated to 95°C. The energy conversion efficiency reached 40% in the picosecond regime for a fundamental energy of 20 µJ that corresponds to an intensity of 1.5 GW/cm2. It is the highest value of THG efficiency ever reported to the best of our knowledge. The modeling in the case of the depleted pump regime accurately described the experiments.",

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AU - Vernay, Augustin

AU - Bonnet-Gamard, Lucas

AU - Boutou, Véronique

AU - Trajtenberg-Mills, Sivan

AU - Arie, Ady

AU - Boulanger, Benoît

PY - 2020/6/15

Y1 - 2020/6/15

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AB - We performed and studied cascaded third-harmonic generation (THG) in a quasi-periodically poled KTP (QPPKTP) crystal allowing simultaneous phase-matching of the two cascading steps ω + ω → 2ω and 2ω + ω → 3ω. The phase-matching was achieved at the fundamental wavelength λω = 1587 nm when the QPPKTP crystal was heated to 95°C. The energy conversion efficiency reached 40% in the picosecond regime for a fundamental energy of 20 µJ that corresponds to an intensity of 1.5 GW/cm2. It is the highest value of THG efficiency ever reported to the best of our knowledge. The modeling in the case of the depleted pump regime accurately described the experiments.

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High efficiency cascaded third-harmonic generation in a quasi-periodically poled KTiOPO₄ crystal

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