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报道了一种新型自倍频晶体Yb∶Gd0.2Y0.75(BO3)4(Yb∶GdYAB)在二极管激光器端面抽运条件下的连续光激光运转。为了实现紧凑的新型全固态激光器的激光运转,设计了一个平平谐振腔,两个镜子的分开距离仅为1 cm,在这种腔结构下,得到了中心波长为1044 nm的基频激光输出,当吸收抽运功率为4.22 W时,基频激光的最大输出功率为1.38 W,相应功率曲线最大斜效率为54%。为获得有效的自倍频激光输出,换用了平凹腔进行了自倍频实验。自倍频光运转阈值仅为900 mW,在吸收抽运功率为3.9 W的条件下,得到144 mW的自倍频绿色激光输出,获得从二极管激光器到绿光的直接光-光转换效率为3.7%。实验结果表明Yb∶GdYAB作为一种新型的自倍频晶体,对于紧凑的1μm波段的基频光和自倍频可见光激光器都有着很大的应用潜力。
A new type of self-doubling frequency crystal, Yb: Gd0.2Y0.75 (BO3) 4 (Yb: GdYAB), was reported to operate under continuous laser light pumping at the diode laser end face. In order to realize the laser operation of a compact new all-solid-state laser, a flat resonant cavity is designed with a distance of only 1 cm between two mirrors. Under this cavity structure, a fundamental laser output with a center wavelength of 1044 nm is obtained, When the absorbed pump power is 4.22 W, the maximum output power of the fundamental laser is 1.38 W, and the maximum slope efficiency of the corresponding power curve is 54%. In order to obtain effective self-doubled laser output, switched to a flat cavity for self-frequency doubling experiments. Since the threshold of the frequency doubling light is only 900 mW, a self-doubled green laser output of 144 mW is obtained with an absorbed pumping power of 3.9 W, and the direct light-to-light conversion efficiency from the diode laser to the green light is 3.7 %. The experimental results show that Yb: GdYAB, as a new self-doubling frequency crystal, has great potential application in the compact 1μm band fundamental frequency laser and frequency doubling frequency visible laser.