Photostability of the laser emission from dye-doped spherical particles
Photostability of the laser emission from dye-doped spherical particles
复制标题
染料掺杂球形颗粒激光发射的光稳定性
DOI：
10.1117/12.453560
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
M. Yamane
中科院分区：
文献类型：
--
作者：
S. Shibata;A. Araya;T. Yano;M. Yamane
采用振动孔技术制备了含有罗丹明6G、DCM和吡啶1等激光染料的微米级球形粒子。混合原料稀释后的圆柱形液体射流通过孔板，通过机械振动分解成大小相等的液滴。然后这些液滴的溶剂在载气的飞行过程中蒸发，随后在铵水阱中固化成染料掺杂的混合微球。用调q Nd: YAG激光器（532 nm波长，重复频率为10 Hz）二次谐波脉冲抽运不同染料含量的微球，并测量其光降解强度与抽运脉冲发射次数的关系。降解程度强烈依赖于泵送功率和微球中掺入的染料含量。适当的泵浦功率和染料含量给出了光稳定性的最佳数据：R6G和吡啶1经过10万次脉冲和DCM经过24万次脉冲后，激光输出能量消耗为初始值的50%。
Micrometer-sized spherical particles containing laser dyes such as Rhodamine 6G, DCM and Pyridine 1 have been fabricated by the vibrating orifice technique for the spherical cavity micro-laser. A cylindrical liquid jet of diluted hybrid raw materials passing through an orifice breaks up into equal-sized droplets by mechanical vibration. Then the solvent of these droplets was evaporated during flying with carrier gas and subsequently solidified into dye-doped hybrid-microspheres in ammonium water trap. The microspheres of different dye contents were pumped by second harmonic pulses of Q-switched Nd: YAG laser (532 nm wavelength, repetition rate is 10 Hz) and their photodegradation of lasing intensities were measured against shot number of pumping pulses. Degree of the degradation strongly depended on the pumping power and the dye content incorporated in the microsphere. Suitable pumping power and dye content gave the best date for the photostability: Laser out-put energy was consumed 50% of the initial value after 100,000 pulses for R6G and Pyridine 1, and 240,000 pulses for DCM.