Vol. 20, issue 12, article # 8

Apeksimov D.V., Geints Yu.E., Zemlyanov A.A. Frequency-pulsed regime of a spherical microcavity excitation by ultrashort chirped laser radiation. // Atmospheric and oceanic optics. 2007. V. 20. No. 12. P. 997-1000.
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Resonance excitation of the internal optical field of transparent spherical microparticles under irradiation by a train of ultrashort laser pulses has been simulated numerically. It has been determined that the incident radiation can be tuned optimally to preset high-Q resonance with a particle by varying the pulse ratio in the train with the linear frequency modulation of every pulse in the train (chirping). Analytical equations have been derived for calculation of these parameters depending on the laser pulse duration and the frequency of the resonance to be excited.