Work

Noncritical phase-matching characteristics of 248 nm deep-UV generation in DKDP crystals

Year: 2025

Type: article

Abstract: KDP-family crystals with large-diameter growth characteristics are ideal materials for obtaining high-energy deep-UV lasers. Based on the third-harmonic generation of 1064 nm laser and the 827 nm optical parametric oscillation pumped by 532 nm radiation, 248 nm deep-UV laser radiations were obtained via noncritical phase-matching (NCPM) sum-frequency generation in 89.6% and 98.8% DKDP crystals at 112.4 and 93.6 °C, respectively. The NCPM characteristics of the DKDP crystals were presented by tuning the crystal temperatures and incident angles, which was conducive to further exploiting the advantages of NCPM. This work presents a feasible high-energy 248 nm generation scheme to serve as the seed for the KrF excimer laser amplifier and pave the way for the energy improvement and applications of the deep-UV radiation by fully utilizing the large-diameter advantages of KDP-family crystals.

Source: Optics Express

DOI: 10.1364/oe.573861

Authors: Yiqun Shi, Zijian Cui, Mingying Sun, Xinglong Xie, De’an Liu, Jianqiang Zhu

Institutions: Shanghai Institute of Optics and Fine Mechanics, University of Chinese Academy of Sciences, Shanghai Zhangjiang Laboratory, Zhangjiang Laboratory

Language: English

Topic: Solid State Laser Technologies

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,270

Funders: National Natural Science Foundation of China, Youth Innovation Promotion Association of the Chinese Academy of Sciences, Shanghai Rising-Star Program