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研究了一种基于掺氧化镁周期极化铌酸锂(PPMgOLN)晶体的高效紧凑型的腔内倍频全固态TEM00绿光激光器。倍频晶体选用极化周期为6.96μm的1mm长的PPMgOLN晶体,该极化周期对应的准相位匹配(QPM)温度为26℃,腔内倍频温度带宽(FWHM)为15℃;通过单个温度控制器来控制808nm半导体激光器、激光晶体Nd∶YVO4、和非线性晶体PPMgOLN的工作温度在26℃;在泵浦功率3.6 W的情况下,产生1.84 W的连续TEM00绿光输出,光-光转换效率达到51%,1h内的输出功率波动小于1%。
A highly efficient and compact intracavity frequency doubled all solid state TEM00 green laser based on MgO doped periodically poled lithium niobate (PPMgOLN) crystal was studied. The frequency doubling crystal uses a 1mm long PPMgOLN crystal with a poling period of 6.96μm. The poling period corresponds to a QPM of 26 ° C and a FWHM of 15 ° C. A single temperature Controller to control the operating temperature of the 808nm diode laser, the Nd: YVO4 laser crystal and the PPMgOLN crystal at 26 ℃. At a pump power of 3.6 W, a continuous TEM00 green light output of 1.84 W was obtained. The optical-to- Efficiency of 51%, 1h output power fluctuations of less than 1%.