Author(s): Wang, N (Wang, Nan); Zhang, JY (Zhang, Jingyuan); Yu, HJ (Yu, Haijuan); Lin, XC (Lin, Xuechun); Yang, GW (Yang, Guowen)

Source: OPTICS EXPRESS Volume: 30 Issue: 4 Pages: 5700-5708 DOI: 10.1364/OE.451262 Published: FEB 14 2022

Abstract: We demonstrate the generation of high-energy (133 mJ) and sub-nanosecond (similar to 270 ps) deep ultraviolet (DUV) pulses at 266 nm by sum-frequency mixing in LiB3O5 (LBO) crystals. The highest 133 mJ pulse energy ever reported corresponds to a peak power of 0.49 GW and an energy conversion efficiency of 13.3% from the infrared at 1064 nm to DUV at 266 nm. This is the highest output energy ever reported for the DUV sub-nanosecond pulses to the best of our knowledge. Higher energy efficiency of 25.7% can be achieved from 1064 nm to 266 nm when the fundamental energy was reduced to 346 mJ. Furthermore, the DUV generations using LBO and typical beta-BaB2O4 (BBO) crystals were compared regarding the energy efficiency, and the effects of the nonlinear absorption are discussed. (C) 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement

Accession Number: WOS:000754931700085

PubMed ID: 35209526

ISSN: 1094-4087

Full Text: https://opg.optica.org/oe/fulltext.cfm?uri=oe-30-4-5700&id=469243