氙灯泵浦新型晶体NdS－FAP的激光特性

Laser Chracteristics of Xenon Flash Lamp Pumped Nd∶S FAP Crystal

测量了新型晶体ＮｄＳ－ＦＡＰ，［ＮｄＳｒ５（ＰＯ４）３Ｆ］的非偏振光吸收光谱。它具有宽的有效吸收带，在５７５ｎｍ和８０４．５ｎｍ处有二个强的吸收峰。采用微型氙灯泵浦实现了自由运转和染料片调Ｑ运转。激光输出波长为１．０５９μｍ。自由运转的阈值能量仅为１５０ｍＪ，斜效率为１．２５％；调Ｑ输出的峰值功率密度为１０ＭＷ／ｃｍ２。测量了发射光谱及不同腔长、不同染料片小信号透射率情况下的输出能量、脉冲宽度等。

The absorption spectrum of a new crystal Nd∶S FAP was measured and a broad effective absorption band and two strong absorption pesks at 575 nm and 804.5 nm were observed. By using a Xeon flash lamp pumping, laser operation has been demonstrated at 1.059 μm with threshold energy of only 150 mJ, slope efficiency of 1.25% and a peak power of 10 MW/cm 2. The emission spectrum, output energy and pulse width were presented. The prospect of Nd∶S FAP crystal for low threshold and high efficiency miniature laser was discussed.