Zijing Li, Lili Yan, Peng Zuo, Liangyue Xie, Zhiqiang Li, Bing Jin. Development of Tabletop Femtosecond Vacuum Ultraviolet Laser Source Based on Four-Wave Mixing Techniques[J]. Chinese Journal of Lasers, 2021, 48(12): 1201007

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- Chinese Journal of Lasers
- Vol. 48, Issue 12, 1201007 (2021)

Fig. 1. Schematic of four-wave mixing

Fig. 2. Schematic of geometric phase matching of non-collinear four-wave mixing
![Schematic of the generation of femtosecond VUV pulses by two-photon near-resonant four-wave difference-frequency mixing. (a) Schematic of two-photon near-resonant four-wave difference-frequency mixing in argon; (b) schematic of a femtosecond laser system with a center wavelength of 774 nm; (c) schematic of tunable femtosecond VUV laser source system and femtosecond light detection system[40]](/Images/icon/loading.gif)
Fig. 3. Schematic of the generation of femtosecond VUV pulses by two-photon near-resonant four-wave difference-frequency mixing. (a) Schematic of two-photon near-resonant four-wave difference-frequency mixing in argon; (b) schematic of a femtosecond laser system with a center wavelength of 774 nm; (c) schematic of tunable femtosecond VUV laser source system and femtosecond light detection system[40]
![Schematic of cascaded four-wave mixing in hollow-fiber[26]](/Images/icon/loading.gif)
Fig. 4. Schematic of cascaded four-wave mixing in hollow-fiber[26]
![Schematic of femtosecond VUV laser generated by direct four-wave mixing process in hollow-fiber[42]](/Images/icon/loading.gif)
Fig. 5. Schematic of femtosecond VUV laser generated by direct four-wave mixing process in hollow-fiber[42]
![Femtosecond VUV laser source. (a) Femtosecond VUV laser source and detection system[25] using the direct four-wave mixing process 3ω+3ω-ω®5ω in argon; (b) femtosecond VUV laser source system[45] using the direct four-wave mixing process 3ω+3ω-ω®5ω in krypton](/Images/icon/loading.gif)
Fig. 6. Femtosecond VUV laser source. (a) Femtosecond VUV laser source and detection system[25] using the direct four-wave mixing process 3ω+3ω-ω®5ω in argon; (b) femtosecond VUV laser source system[45] using the direct four-wave mixing process 3ω+3ω-ω®5ω in krypton
![Femtosecond VUV laser source and detection system using the noncollinear direct four-wave mixing process 3ω+3ω-ω®5ω in filament in argon[47]](/Images/icon/loading.gif)
Fig. 7. Femtosecond VUV laser source and detection system using the noncollinear direct four-wave mixing process 3ω+3ω-ω®5ω in filament in argon[47]
![Schematic of femtosecond UV laser generation using collinear four-wave mixing in filament[27]](/Images/icon/loading.gif)
Fig. 8. Schematic of femtosecond UV laser generation using collinear four-wave mixing in filament[27]
![Photoelectron imaging apparatus based on a tabletop femtosecond VUV laser source. (a) Instrument diagram; (b) schematic of differential pumping system between neon filament tube and reflection/collimation chamber[51]](/Images/icon/loading.gif)
Fig. 9. Photoelectron imaging apparatus based on a tabletop femtosecond VUV laser source. (a) Instrument diagram; (b) schematic of differential pumping system between neon filament tube and reflection/collimation chamber[51]

Fig. 10. Schematic of the generation of femtosecond VUV laser (133 nm, 6ω)
![Schematic of femtosecond VUV laser source based on infrared light and 3ω laser as driving lasers for four-wave mixing in filament[56]](/Images/icon/loading.gif)
Fig. 11. Schematic of femtosecond VUV laser source based on infrared light and 3ω laser as driving lasers for four-wave mixing in filament[56]

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