Abstract
Micrometer-sized droplets of Rhodamine 6G solution in water and ethanol are irradiated by high-intensity nanosecond pulses from a frequency-doubled Nd:YAG laser. Coupling of the spontaneous fluorescence emission with natural resonant modes of the spherical droplets results in stimulated emission, with each droplet behaving like a laser cavity. Spectral observations suggest that droplet lasing emission is supported by resonances of a single mode order. The emission exhibits faster rise times and is shorter lived than corresponding bulk-liquid fluorescence. Lasing in droplets is generally initiated almost simultaneously with elastic scattering, unlike stimulated Raman scattering, which is significantly delayed.
© 1989 Optical Society of America
Full Article | PDF ArticleMore Like This
R. G. Pinnick, A. Biswas, P. Chўlek, R. L. Armstrong, H. Latifi, E. Creegan, V. Srivastava, M. Jarzembski, and G. Fernández
Opt. Lett. 13(6) 494-496 (1988)
Hamid Latifi, Abhijit Biswas, Robert L. Armstrong, and Ronald G. Pinnick
Appl. Opt. 29(36) 5387-5392 (1990)
H.-M. Tzeng, K. F. Wall, M. B. Long, and R. K. Chang
Opt. Lett. 9(11) 499-501 (1984)