5.32 W ultraviolet laser generation at 266â
nm using sum-frequency method with CsB3O5 crystal.
Opt Express
; 31(2): 802-809, 2023 Jan 16.
Article
en En
| MEDLINE
| ID: mdl-36785129
ABSTRACT
Ultraviolet (UV) beam generation at 266â
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) 266â
nm UV beam output. First, a ps laser device with simultaneously radiated wavelengths of 1064 and 355â
nm and repetition frequency of 10â
Hz was used as the fundamental laser source, and the conversion efficiency from 1064 + 355â
nm to 266â
nm reached 20.35%. We then used a 1064â
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 266â
nm reached 5.32 W.
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