论文部分内容阅读
为了确定激光晶体在不同温度下的自发辐射光谱(荧光谱),实验研究了阈值附近微片激光器的输出光谱特性。当抽运功率略小于阈值时,微片激光器输出经干涉的自发辐射光;当抽运功率大于阈值时,微片激光器输出激光。测量了激光阈值与晶体温控的关系,结果表明激光阈值随晶体温度的升高而增加,其变化率为0.017 W/℃。在不同温控条件下,对阈值以下的自发辐射光谱包络进行了拟合测量,结果表明随着晶体温度的升高自发辐射光谱包络峰值降低,下降率为0.681%/℃;光谱包络中心波长发生红移,漂移率为3.1pm/℃。
In order to determine the spontaneous emission spectra (fluorescence spectra) of laser crystals at different temperatures, the output spectral characteristics of a microtiter laser near the threshold were experimentally investigated. When the pumping power is slightly less than the threshold, the microtip laser outputs the interfered spontaneous emission light; when the pumping power is greater than the threshold, the microtiter laser outputs laser light. The relationship between laser threshold and crystal temperature was measured. The results show that the laser threshold increases with the increase of crystal temperature, and the rate of change is 0.017 W / ℃. Under different temperature conditions, the envelope of the spontaneous emission spectra below the threshold was fitted and measured. The results showed that the peak value of spontaneous emission spectral envelope decreased with the increase of the crystal temperature, the decreasing rate was 0.681% / ℃. The spectral envelope Center wavelength red shift, drift rate of 3.1pm / ℃.