短波紫外278nm和281nm全固态激光研究

Investigation of all-solid-state short-ultraviolet 278nm and 281nm laser

波长介于200-300nm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1064nm激光四倍频实现266nm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（1112nm、l123nm）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281nm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。

Short-Ultraviolet （means wavelength between 200 nm and 300 nm） Diode-Pumped Solid-State Laser （DPL）, because of its short wavelength, high photon energy, special wave-band and excellent application and precision performances, has significant applications in laser precision manufacturing, science frontiers and aerospace fields. Currently, high power short-ultraviolet laser is mainly obtained by fourth harmonic generation of Nd：YAG 1 064 nm laser （266 nm）, however, its application performance is seriously restricted by the nonlinear optical crystal of fourth harmonic generation. The investigation of a novel high power and high beam quality Nd：YAG 1.1 μm （1 112 nm and 1 123 nm） laser, and further the latest research progress of a novel high power 278 and 281 nm laser generation under this 1.1 μm pumping source by using an excellent nonlinear optical crystal CBO were presented, which was innovatively applied from high power third harmonic generation to high power fourth harmonic generation. It is desired to achieve a novel high power short-ultraviolet DPL with excellent applicationperformances.