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把固体染料激光器工作介质激射寿命的概念推广到液体染料激光器中,同时提出了一种针对液体激光染料激射寿命的双激光光路测试方法。该方法使用波长为532 nm的Nd∶YAG脉冲激光器作为抽运光来模拟染料激光器中的抽运条件,用波长相同的低功率连续激光作为监测染料分子在抽运光作用下失效速率的手段。利用半导体制冷器件,PID温控仪和水浴槽实现了液体染料的恒温控制。测量了激光平均功率密度从6.3×103~2.2×104W/m2变化范围内R6G染料乙醇溶液的激射寿命。实验结果表明,染料的激射寿命与抽运光功率密度成反比,比例系数可以解释为染料分解一半时,分子单位吸收截面上累积的辐照能量。用该系数表征染料的激射寿命特征更具有普遍意义。
The concept of lasing life of working medium for solid dye laser is extended to liquid dye laser. A dual laser optical path testing method for laser lasing life of liquid laser is proposed. The method uses a 532 nm wavelength Nd: YAG pulsed laser as the pump light to simulate the pumping conditions in the dye laser and the low-power continuous laser with the same wavelength is used as a means of monitoring the failure rate of dye molecules under pumping light. The use of semiconductor refrigeration devices, PID temperature controller and water bath to achieve a liquid dye temperature control. The laser lifetime of the R6G dye ethanol solution was measured at a laser average power density ranging from 6.3 × 10 3 to 2.2 × 10 4 W / m 2. The experimental results show that the lasing life of the dye is inversely proportional to the power density of the pumping light, and the proportionality coefficient can be explained as the energy of radiation accumulated on the absorption cross section of the molecule when the dye is decomposed by half. Using this coefficient to characterize the lasing life of the dye has more general significance.