310 nm Ultraviolet Solid‑State Raman Laser

Yilan Chen; Jiqiao Liu; Mingjian Wang; Xiaolei Zhu

doi:10.3788/CJL230542

Chinese Journal of Lasers, Volume. 50, Issue 22, 2201005(2023)

310 nm Ultraviolet Solid‑State Raman Laser

Yilan Chen^1,2, Jiqiao Liu^2,3、*, Mingjian Wang³, and Xiaolei Zhu^1,2、**

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

³Laboratory of Space Laser Engineering, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China

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Figures & Tables(9)

Fig. 1. Schematic of optical path of 310 nm ultraviolet laser

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Fig. 2. Power of 620 nm laser versus pump laser

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Fig. 3. Output spectrum of 620 nm red light with 550 mW output power

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Fig. 4. Spot diagrams of 620 nm red light with output power of 550 mW. (a) 620 nm red light; (b) 1064 nm pump light

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Fig. 5. Power of 310 nm frequency-doubled laser versus 620 nm laser power

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Fig. 6. Output spectrum of 310 nm ultraviolet light

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Fig. 7. Pulse waveforms of 620 nm fundamental light and 310 nm frequency-doubled light

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Table 1. Comparison of characteristics of common Raman crystals ^[21]

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Table 1. Comparison of characteristics of common Raman crystals ^[21]

Raman gain medium	Thermal conductivity / （W·m^-1·K^-1）	Raman gain coefficient / （cm·GW^-1）（1 μm）	Raman shift /cm^-1	Raman line width /cm^-1	Transmission range /μm
Diamond	2000	10‒12	1332.5	2	>0.23
YVO₄	5.2	4.5	890	3.0	0.4‒5.0
KGd（WO₄）₂	2.6，3.8，3.4	3.5	767，901.5	7.8，5.9	0.34‒5.50
Ba（NO₃）₂	1.17	11	1047.6	0.4	0.35‒1.80
CaWO₄	16	3.0	908	4.8	0.2‒5.3
GdVO₄	10.5	>4，5	885	3.0	0.35‒5.00
BaWO₄	3.0	8.5	926	1.6	0.26‒3.70

Table 2. Characteristics of frequency doubling crystals for 310 nm ultraviolet laser generation

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Table 2. Characteristics of frequency doubling crystals for 310 nm ultraviolet laser generation

Nonlinear crystal	Transmission range /nm	I-type phase-matching angle		Walk off angle /mrad	d_eff /（pm·V^-1）
Nonlinear crystal	Transmission range /nm	θ /（°）	φ /（°）	Walk off angle /mrad	d_eff /（pm·V^-1）
LBO	150‒2600	90.0	57.7	17.86	0.49
BBO	189‒3300	38.9	‒	80.8	1.90
KBBF	147‒3500	31.0	‒	56.51	0.43
RBBF	165‒3500	33.8	‒	52	0.40