Ray Alok A, Sinha Sucharita, Kundu Soumitra, Kumar Sasi, Nair Sivagiriyal Karunakaran Sreenivasan, Pal Tamal, Dasgupta Kamalesh
Tunable Laser Section, Laser and Plasma Technology Division, Bhabha Atomic Research Centre, Mumbai 400 085, India.
Appl Opt. 2002 Mar 20;41(9):1704-13. doi: 10.1364/ao.41.001704.
The performance of a copper vapor laser-pumped narrow-band dye laser in oscillator-amplifier configuration with water-based binary mixture solvents is described. Although oscillator efficiency in water-surfactant (sodium lauryl sulfate) solvent was comparable with that that employed pure ethanolic solvent, amplifier efficiency was found to be lower. Experiments that were carried out with vertically polarized pump beams and either horizontally or vertically polarized signal beams show that, in case of both the pump and signal having orthogonal polarization (horizontal) and same polarization (vertical), the extraction efficiency for both ethanolic and water-micelle media increased substantially from 15.7% to 18.5% and from 10% to 12.5%, respectively. However, the relative difference remained nearly the same, indicating that a slower orientational diffusion of excited dye molecules in a micellar medium is not responsible for a decrease in amplifier efficiency. Amplifier efficiency comparable with that containing ethanolic dye solutions could be obtained with a binary solvent that comprises a mixture of water and about 30% n-propanol. The performances of two efficient dyes, Rhodamine-6G and Kiton Red S, using water-based solvents were studied.
描述了一种采用水基二元混合溶剂的铜蒸气激光泵浦窄带染料激光器在振荡器 - 放大器配置下的性能。尽管在水 - 表面活性剂（十二烷基硫酸钠）溶剂中的振荡器效率与使用纯乙醇溶剂时相当，但发现放大器效率较低。用垂直偏振泵浦光束和水平或垂直偏振信号光束进行的实验表明，在泵浦和信号具有正交偏振（水平）和相同偏振（垂直）的情况下，乙醇和水 - 胶束介质的提取效率分别从15.7%大幅提高到18.5%和从10%提高到12.5%。然而，相对差异几乎保持不变，这表明激发染料分子在胶束介质中较慢的取向扩散不是放大器效率降低的原因。使用包含水和约30%正丙醇混合物的二元溶剂可获得与含乙醇染料溶液相当的放大器效率。研究了两种高效染料罗丹明 - 6G和奇通红S在水基溶剂中的性能。
