论文标题
高光稳定，kHz重复率，二极管泵送的无循环液体染料激光器具有热透镜管理
Highly photo-stable, kHz-repetition-rate, diode pumped circulation-free liquid dye laser with thermal lens management
论文作者
论文摘要
液体染料激光长期以来一直被认为是可见范围内的理想可调激光源，但笨重，昂贵，需要复杂的染料循环系统。在这里，我们提出了一个系统，该系统依赖于低成本的蓝色激光二极管作为泵源和没有流动电路的密封染料电池，从而结合了固态设备的便利性和尺寸以及液体有机激光器稳定性的设备。获得非常高的光稳定性（最高1.2 x 10 $^9 $脉冲或1 kHz的12天），该稳定性比在类似条件下操作的固态染料激光高五个数量级。发现以低重复速率获得的脉冲数量受到分子自扩散的限制，因此与总比色杯相关。相比之下，重复率仅限于几个kHz，这表明热效应比三重态人口效应起着更大的作用。热效应参与通过堆积强的负热透镜的抑制激光抑制。通过谐振器设计纠正该热透镜的非截然部分，可以将重复速率推高到14 kHz，并可能进一步优化。这项工作显示了在可见范围内建造现成，紧凑，低成本和可调的脉冲激光器的途径，这些激光器比有机固态激光器具有优越的稳定性。
Liquid dye lasers have long been considered as ideal tunable laser sources in the visible range but are bulky, expensive, and require a complex system for dye circulation. Here, we present a system that relies on a low-cost blue laser diode as the pump source and a sealed dye cell with no flowing circuitry, resulting in a device that combines the convenience and size of a solid-state device with the stability of a liquid organic laser. A very high photo-stability is obtained (up to 1.2 x 10$^9$ pulses or 12 days at 1 kHz), which is five orders of magnitude higher than a solid-state dye laser operated in similar conditions. The number of pulses obtainable at low repetition rates is found to be limited by molecular self-diffusion and, hence, related to the total cuvette volume. In contrast, the repetition rate is limited to a few kHz, which suggests that thermal effects play a bigger role than triplet population effects. Thermal effects participate in the suppression of lasing through the buildup of a strong negative thermal lens; correcting the non-aberrant part of this thermal lens by resonator design enables the repetition rate to be pushed up to 14 kHz with possible further optimization. This work shows a route for building off-the-shelf, compact, low-cost, and convenient tunable pulsed lasers in the visible range that have superior stability over organic solid-state lasers.
