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波长介于200~300 nm的短波紫外全固态激光(DPL)具有波长短、光子能量高、波段特殊,可实用化与精密化等特点,在激光精密加工、前沿科学及航空航天领域具有重大应用价值。目前,高功率短波紫外激光实现主要基于Nd:YAG晶体1 064 nm激光四倍频实现266 nm激光输出,然而其实用化特性严重受制于现有的四倍频非线性晶体材料。通过新型高功率高光束质量1.1μm(1 112 nm、1 123 nm)Nd:YAG近红外基频激光研究,并以此为泵浦源,创新性将综合性能优良的紫外CBO非线性光学晶体从紫外三倍频应用拓展到高功率短波紫外四倍频278和281 nm应用的最新研究进展,有望获得一种可实用化高功率新型短波紫外全固态激光源。
Shortwave ultraviolet all-solid-state lasers (DPLs) with wavelength between 200 and 300 nm have short wavelength, high photon energy, special wave band, practicality and precision. They have great applications in the fields of laser precision machining, cutting-edge science and aerospace value. At present, the high-power shortwave UV laser is mainly based on the Nd: YAG crystal at a frequency of 1 064 nm and achieves a laser output of 266 nm. However, its practical use characteristics are severely limited by the existing quadrupled nonlinear crystal materials. Based on the new 1.1 μm (1 112 nm, 1 123 nm) Nd: YAG near-infrared fundamental frequency laser with high power and high beam quality, and using this as a pump source, the new ultra-high power CBO nonlinear optical crystal The application of UV triplex frequency expands to the latest research progress of 278 and 281 nm applications of high-power shortwave UV-C and is expected to be a practical and high-power shortwave UV all-solid-state laser source.