SINGLE PASS GAIN OF EXCIPLEX 4‐MU AND RHODAMINE 6G DYE LASER AMPLIFIERS
SINGLE PASS GAIN OF EXCIPLEX 4‐MU AND RHODAMINE 6G DYE LASER AMPLIFIERS
复制标题
EXCIPLEX 4‐MU 和罗丹明 6G 染料激光放大器的单程增益
DOI：
--
复制
发表时间：
1970
期刊：
影响因子：
--
通讯作者：
W. Silfvast
中科院分区：
文献类型：
--
作者：
C. Shank;A. Dienes;W. Silfvast
在N2激光泵浦的激基复合物4-甲基伞形酮（4-MU）和罗丹明6 G染料激光器中，使用由Silfvast和Deech开发的高增益脉冲金属蒸气激光器技术测量了单程增益。通过比较单池和双池长度中放大的自发发射强度来测量增益，其中最大不饱和单程增益受自发发射饱和度的限制。测量两种染料的最大不饱和增益为20 dB/cm。发现增益随泵浦功率线性变化。该技术也被用来测量增益随波长的变化，对于一个给定的泵浦功率。激基复合物4-MU的最大增益发生在荧光峰处，而罗丹明6 G由于基态重吸收而移动到更长的波长。通过将测得的增益与波长的关系与理论拟合，可以推导出罗丹明6 G溶液中的部分激发单重态布居。
Single pass gain has been measured in N2 laser pumped exciplex 4‐Methylumbelliferone (4‐MU) and rhodamine 6G dye lasers using a technique developed by Silfvast and Deech for high‐gain pulsed metal vapor lasers. The gain is measured by comparing the intensities of amplified spontaneous emission in single and double cell lengths with the maximum unsaturated single‐pass gain being limited by the saturation of the spontaneous emission. Maximum unsaturated gains on the order of 20 dB/cm were measured for both dyes. The gain was found to vary linearly with pump power. The technique was also used to measure the variation of gain with wavelength for a given pump power. The maximum gain for exciplex 4‐MU occurred at the fluorescence peak, whereas for rhodamine 6G it was shifted to a longer wavelength due to ground‐state reabsorption. By fitting the measured gain versus wavelength to the theory, it was possible to deduce the fractional excited singlet population in the rhodamine 6G solution.