Lin H B, Huston A L, Justus B L, Campillo A J
Opt Lett. 1986 Oct 1;11(10):614-6. doi: 10.1364/ol.11.000614.
We report lasing characteristics of 40-60-microm-diameter Rhodamine 590/water solution droplets pumped by a 20-nsec-duration Q-switched laser. The Rhodamine/water solution provides a useful model system for studying the properties of oscillators based on whispering-gallery-wave spherical cavities. The low threshold for lasing, 10(4) W/cm(2) for 10(-4) M solutions, is consistent with particle size and a cavity Q factor of 10(4). Portions of the droplet lase purely in transverse electric (TE) modes, while other portions contain both TE and lower-Q transverse magnetic modes. In the far field, the lasing droplet approximates a coherent point source emitting in all directions.
我们报告了用脉宽为20纳秒的调Q激光器泵浦的直径为40 - 60微米的若丹明590/水溶液液滴的激光特性。若丹明/水溶液为研究基于回音壁波球形腔的振荡器特性提供了一个有用的模型系统。其低激光阈值，对于10⁻⁴M的溶液为10⁴W/cm²，与颗粒尺寸和10⁴的腔Q因子一致。液滴的部分区域仅以横向电（TE）模式激射，而其他部分则同时包含TE和低Q值的横向磁模式。在远场中，激射液滴近似于一个向所有方向发射的相干点源。
