摘要:
报道了LD端面抽运c切Nd：YVO4自拉曼倍频黄光激光器的研究.采用10mm长,二类临界相位匹配角（θ=69°,=0°）切割的KTP晶体作为倍频晶体.考虑到c切Nd：YVO4跃迁截面较小,所以通过对谐振腔及晶体膜系的严格设计,减少腔内插入损耗和衍射损耗.最终在脉冲重复率为10kHz,抽运功率为11.2W下,获得了最高570mW的倍频黄光激光输出,对应抽运光到倍频黄光的转化效率约为5.1%,拟合得到输出功率对应抽运功率的斜效率为6.6%.激光中心波长在589.17nm,谱线宽度0.2nm,与钠D2共振谱线符合较好.
Abstract:
In this paper we report a LD end-pumped c-cut Nd：YVO4 yellow laser generated by sef-Raman conversion and frequency doubling. A 10-mm-length KTP with critical phase matching （θ=69°, =0°） cut is adopted as a second-harmonic generation. For the lower stimulated-emission cross section of c-cut Nd：YVO4 crystal, the resonator cavity and the coating of crystals are carefully designed to reduce the insert loss and diffraction loss. Finally, at a repetition rate of 10 kHz and an incident pump power of 11.2 W, the average power of yellow light up to 570 mW is achieved, corresponding to an overall diode-yellow conversion efficiency of 5.1% and a slope efficiency of 6.6%. The central wavelength is at 589.17 nm with a width of 0.2 nm, which is well fitted to the sodium D2 resonance radiation.
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