Huagang Liu, Kaiming Ruan, Jinhui Li, Fei Shi, Jianhong Huang, Wenxiong Lin. High‑Repetition‑Rate Continuously Tunable Ultra‑Short Pulse Laser Across Range from 192 nm to 300 nm[J]. Chinese Journal of Lasers, 2024, 51(7): 0701013

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- Chinese Journal of Lasers
- Vol. 51, Issue 7, 0701013 (2024)

Fig. 1. Schematic of 192‒300 nm continuously tunable deep ultraviolet/ultraviolet laser

Fig. 2. Frequency conversion power and conversion efficiency of laser at each stage. (a) Fundamental laser; (b) second harmonic generation (375‒500 nm); (c) direct forth harmonic generation (210‒250 nm); (d) third harmonic generation from sum frequency(250‒300 nm); (e) forth harmonic generation from sum frequency(192‒210 nm)

Fig. 3. Schematic of compensation of spatial walk-off

Fig. 4. Output spectra of continuously tunable deep ultraviolet/ultraviolet laser covering 192‒300 nm band

Fig. 5. Cross-correlation curve of third harmonic with wavelength of 266.7 nm

Fig. 6. Long term monitoring of beam pointing stability
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Table 1. Crystal parameters for SHG and SFG

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