Efficient generation of femtosecond multi-mJ pulses at 3 µm

Fangjie Zhou; Yi Wu; Z. Alphonse Marra; Seung-Whan Bahk; Zenghu Chang

doi:10.1117/12.2652263

14 March 2023 Efficient generation of femtosecond multi-mJ pulses at 3 μm

Fangjie Zhou, Yi Wu, Z. Alphonse Marra, Seung-Whan Bahk, Zenghu Chang

Proceedings Volume 12405, Nonlinear Frequency Generation and Conversion: Materials and Devices XXII; 1240505 (2023) https://doi.org/10.1117/12.2652263
Event: SPIE LASE, 2023, San Francisco, California, United States

Abstract

A tabletop optical parametric chirped pulse amplification (OPCPA) system is developed based on ZnGeP2 crystals to generate 3.2-mJ, 92-fs pulses centered at 3.1 μm, operating at 1 kHz. Pumped by a 2-μm chirped pulse amplifier (CPA) with a top-hat beam profile, the amplifier achieves a 16.5% overall efficiency, which is the highest efficiency achieved by OPCPA at this wavelength. The spectral bandwidth of the pulse can be further broadened by converting the OPCPA to a non-collinear configuration.

Conference Presentation

Citation Download Citation

Fangjie Zhou, Yi Wu, Z. Alphonse Marra, Seung-Whan Bahk, and Zenghu Chang "Efficient generation of femtosecond multi-mJ pulses at 3 μm", Proc. SPIE 12405, Nonlinear Frequency Generation and Conversion: Materials and Devices XXII, 1240505 (14 March 2023); https://doi.org/10.1117/12.2652263

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