Nd：S—FAP晶体1.328μm激光特性研究

用染料激光和氙灯泵浦实现了ＮｄＳ－ＦＡＰ晶体低阈值、高效率的１．３２８μｍｍ激光运转。在透过率７％的平－平腔情况下，染料激光泵浦斜效率为３８％，阈值４．５ｍＪ，倍频红光波长为０．６６４μｍ，线宽１．３ｎｍ；采用氙灯泵浦（４×３０ｍｍ），实现了１．３２８μｍ自由运转，阈值为２４０ｍＪ，斜效率为０．８５％。测量了不同腔长，不同透过率情况的输出能量、光束发散角和偏振特性等。

Laser Characteristics of Nd:S-FAP Crystal at 1.328 μm

The performance of low-threshold and high-efficiency Nd:S-FAP laser at 1.328 μm has been realized by using xenon flash lamp and tunable dye-laser (570～600 nm) pump respectively. The centre wavelength of frequeney-doubling laser is 664 nm and the linewidth is 1.3 nm. When the transmission of output reflector is 7%，for xenon flame pump the threshold energy is 240 mJ and the slope effeieney is 0.85%, while for tunable dye-laser pump, the threshold energy is 4.5 mJ and the slope efficiency is 38%. The laser characteristics, such as the emission spectrum, the polarization, the devergenee angle and the output energy in different cavity length were given.