Nebel A, Beigang R
Opt Lett. 1991 Nov 15;16(22):1729-31. doi: 10.1364/ol.16.001729.
Efficient frequency conversion of cw mode-locked Ti:A1(2)O(3) laser radiation using lithium triborate, beta-barium borate, and lithium iodate crystals as the nonlinear material is demonstrated. Second-, third-, and fourth harmonic generation results in tunable blue and ultraviolet radiation down to 205 nm with transform-limited pulses and pulse lengths below 1 ps. Maximum average powers (repetition rate 82 MHz) of 700 mW at 400 nm, 120 mW at 272 nm, and 10 mW at 210 nm were obtained. The effects of group-velocity dispersion have to be taken into account to optimize the different frequency-conversion processes.
利用三硼酸锂、β-偏硼酸钡和碘酸锂晶体作为非线性材料，实现了连续锁模钛宝石（Ti:A1₂O₃）激光辐射的高效频率转换。二次、三次和四次谐波产生的可调谐蓝光和紫外光辐射可达205nm，脉冲具有变换极限，脉冲长度低于1ps。在400nm处获得了700mW的最大平均功率（重复频率82MHz），在272nm处为120mW，在210nm处为10mW。为优化不同的频率转换过程，必须考虑群速度色散的影响。
