Chen Y F, Pan Y Y, Liu Y C, Cheng H P, Tsou C H, Liang H C
Opt Express. 2019 Feb 4;27(3):2029-2035. doi: 10.1364/OE.27.002029.
Efficient high-power continuous-wave Nd:YVO visible lasers at versatile wavelengths of 532 (green), 559 (lime), and 588 nm (yellow) are demonstrated to be achieved by using the identical cavity mirrors and gain medium. A dichroic coating is deposited on one end surface of the gain medium to gather the backward green-yellow emission. The green, lime, and yellow outputs are individually optimized by using different phase-matched lithium triborate (LBO) crystals for second harmonic generation (SHG) of the fundamental field, sum frequency generation (SFG) of the fundamental and the stimulated Raman fields, and SHG of the stimulated Raman field, respectively. At a pump power of 31.6 W, the output powers at 532, 559, and 588 nm can be up to 6.8, 5.4, and 3.1 W. The high efficient and compact Nd:YVO lasers at green-lime-yellow wavelengths can be potentially beneficial to future applications in retinal photocoagulation.
通过使用相同的腔镜和增益介质，成功实现了在532（绿色）、559（淡绿色）和588 nm（黄色）等多种波长下高效的高功率连续波Nd:YVO可见激光器。在增益介质的一个端面上沉积了二向色涂层，以收集向后的绿黄色发射光。通过分别使用不同的相位匹配硼酸三锂（LBO）晶体，对基频进行二次谐波产生（SHG）、基频与受激拉曼场进行和频产生（SFG）以及受激拉曼场进行SHG，对绿色、淡绿色和黄色输出进行了单独优化。在31.6 W的泵浦功率下，532、559和588 nm处的输出功率分别可达6.8、5.4和3.1 W。这种高效紧凑的绿色 - 淡绿色 - 黄色波长Nd:YVO激光器可能对未来视网膜光凝应用有益。
