Watanabe M, Ohmukai R, Hayasaka K, Imajo H, Urabe S
Opt Lett. 1994 May 1;19(9):637-9. doi: 10.1364/ol.19.000637.
A cw mode-locked Ti:sapphire laser was efficiently frequency doubled with a lithium triborate crystal in an external enhancement cavity. Second-harmonic output powers of 1.28 W and 860 mW have been generated at 399 nm with fundamental pulse widths of 1.5 and 320 ps, respectively. At the 1.5-ps pulse width the conversion efficiency was 75%. The spectral width of the 320-ps pulses, produced by modification of a laser cavity, is as narrow as the bandwidth of a normal cw, multimode, narrow-bandwidth Ti:sapphire laser. The frequency-doubled output can be thus used as a high-power, narrow-bandwidth light source in the UV region.
一台连续波锁模钛宝石激光器在外部增强腔中用硼酸锂晶体实现了高效倍频。在399nm处分别产生了1.28W和860mW的二次谐波输出功率，其基波脉冲宽度分别为1.5ps和320ps。在1.5ps脉冲宽度时，转换效率为75%。通过改变激光腔产生的320ps脉冲的光谱宽度与普通连续波、多模、窄带宽钛宝石激光器的带宽一样窄。因此，倍频输出可作为紫外区域的高功率、窄带宽光源。
