All-solid-state far-UVC pulse laser at 222 nm wavelength for UVC disinfection

Qihui Luo; Jian Ma; Miao Wang; Tingting Lu; Xiaolei Zhu

doi:10.3788/COL202321.011401

Journals >Chinese Optics Letters >Volume 21 >Issue 1 >Page 011401 > Article

Chinese Optics Letters
Vol. 21, Issue 1, 011401 (2023)

All-solid-state far-UVC pulse laser at 222 nm wavelength for UVC disinfection

Qihui Luo^1、2, Jian Ma^1、*, Miao Wang^1、2, Tingting Lu^1、**, and Xiaolei Zhu^1、2、3

Author Affiliations

¹Key Laboratory of Space Laser Communication and Detection Technology, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China

²Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China

³Pilot National Laboratory for Marine Science and Technology, Qingdao 266237, China

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DOI: 10.3788/COL202321.011401 Cite this Article Set citation alerts

Qihui Luo, Jian Ma, Miao Wang, Tingting Lu, Xiaolei Zhu. All-solid-state far-UVC pulse laser at 222 nm wavelength for UVC disinfection[J]. Chinese Optics Letters, 2023, 21(1): 011401 Copy Citation Text

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Abstract

A 222 nm all-solid-state far-ultraviolet C (UVC) pulse laser system based on an optical parametric oscillator (OPO) and second-harmonic generation (SHG) using

β - {Ba}_{2} {BO}_{4}

(BBO) crystals was demonstrated. Pumped by a

Nd : Y_{3} {Al}_{5} O_{12}

laser with a repetition rate of 100 Hz at 355 nm, the maximum signal laser pulse energy of 1.22 mJ at 444 nm wavelength was obtained from the BBO-OPO system, corresponding to a conversion efficiency of 27.9%. The maximum output pulse energy of 164.9 µJ at the 222 nm wavelength was successfully achieved, corresponding to an SHG conversion efficiency of 16.2%. Moreover, the tunable output wavelength of UVC light from 210 nm to 252.5 nm was achieved.

Keywords

all-solid-state pulse laser optical parametric oscillator second-harmonic generation UVC disinfection

η = 0.9 \times \frac{1 - R}{1 - R \times (1 - δ_{scat})} \times \frac{{(\ln N)}^{2.33}}{N},

(1)

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Qihui Luo, Jian Ma, Miao Wang, Tingting Lu, Xiaolei Zhu. All-solid-state far-UVC pulse laser at 222 nm wavelength for UVC disinfection[J]. Chinese Optics Letters, 2023, 21(1): 011401

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