Efficient second harmonic generation of a high-power picosecond CO 2 laser

Efficient second harmonic generation of a high-power picosecond CO 2 laser

A comparative analysis of AgGaSe , GaSe, CdGeAs , and Te for second harmonic generation (SHG) of a picosecond CO laser at intensities up to 50 GW/cm is presented. We demonstrate external energy conversion efficiency of >20% in AgGaSe . Conversion efficiency >5% is measured in GaSe and CdGeAs ....

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Veröffentlicht in:Optics letters 2022-03, Vol.47 (5), p.1259
Hauptverfasser: Matteo, Daniel, Welch, Eric, Tochitsky, Sergei, Schunemann, Peter G, Guha, Shekhar, Joshi, Chan
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container_issue 5
container_start_page 1259
container_title Optics letters
container_volume 47
creator Matteo, Daniel
Welch, Eric
Tochitsky, Sergei
Schunemann, Peter G
Guha, Shekhar
Joshi, Chan
description A comparative analysis of AgGaSe , GaSe, CdGeAs , and Te for second harmonic generation (SHG) of a picosecond CO laser at intensities up to 50 GW/cm is presented. We demonstrate external energy conversion efficiency of >20% in AgGaSe . Conversion efficiency >5% is measured in GaSe and CdGeAs . Self-focusing and multifilamentation are found to severely limit the SHG process in CdGeAs and Te at such high fields. Demonstration of ≥150 MW SH pulses for a 10 m picosecond pump, in combination with femtosecond CO laser development, will open new strong-field applications in the 4.5-5.5 m range.
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