5.32 W ultraviolet laser generation at 266 nm using sum-frequency method with CsB3O5 crystal

Author:

Chen XudongORCID,Chen Yuwei1,Zhang Ling12,Fan Feidi2,Zhang Zhiyan12,Zhang Guochun2,Wang Xiaoyang2ORCID,Wang Lirong2

Affiliation:

1. Chinese Academy of Sciences

2. University of Chinese Academy of Sciences

Abstract

Ultraviolet (UV) beam generation at 266 nm using the sum-frequency (SFG) method with CsB3O5 (CBO) crystals was first suggested in 1997 [Opt. Lett. 22, 1840 (1997).10.1364/OL.22.001840]; however, there has been no further research in the past 25 years. Herein, by sum-frequency mixing in CBO crystals, we obtained a high conversion efficiency picosecond (ps) and a high-power nanosecond (ns) 266 nm UV beam output. First, a ps laser device with simultaneously radiated wavelengths of 1064 and 355 nm and repetition frequency of 10 Hz was used as the fundamental laser source, and the conversion efficiency from 1064 + 355 nm to 266 nm reached 20.35%. We then used a 1064 nm ns laser with a high output power and repetition frequency of 10 kHz as the pump source. We accurately modified the optimal phase matching direction of the CBO crystal, and the achieved output power at 266 nm reached 5.32 W.

Funder

Beijing Municipal Science & Technology Commission, Administrative Commission of Zhongguancun Science Park

National Natural Science Foundation of China

Chinese Academy of Sciences

Publisher

Optica Publishing Group

Subject

Atomic and Molecular Physics, and Optics

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