Efficient second harmonic generation of a high-power picosecond CO2 laser
Abstract
A comparative analysis of AgGaSe2, GaSe, CdGeAs2, and Te for second harmonic generation (SHG) of a picosecond CO2 laser at intensities up to 50 GW/cm2 is presented. We demonstrate external energy conversion efficiency of >20% in AgGaSe2. Conversion efficiency >5% is measured in GaSe and CdGeAs2. Self-focusing and multifilamentation are found to severely limit the SHG process in CdGeAs2 and Te at such high fields. Demonstration of ≥150 MW SH pulses for a 10 μ m picosecond pump, in combination with femtosecond CO2 laser development, will open new strong-field applications in the 4.5–5.5 μ m range.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Feb 28, 2022
- Source ID
- 10.1364/ol.445099
Entities
People
- Chandrashekhar J. Joshi
- Daniel Matteo
- Eric Welch
- Peter G Schunemann
- Sergei Tochitsky
- Shekhar Guha
Organizations
- BAE Systems
- Office of Naval Research
- University of California, Los Angeles