標題: LASER-INDUCED RADIATION LEAKAGE FROM MICRODROPLETS
作者: CHEN, G
CHOWDHURY, DQ
CHANG, RK
HSIEH, WF
光電工程學系
Department of Photonics
公開日期: 1-四月-1993
摘要: Intensity distributions on the droplet surface and within the droplet are calculated and found helpful in explaining the observed laser-induced radiation leakage from various locations on or within the droplet. In an attempt to distinguish various possible mechanisms for laser-induced perturbation of micrometer-sized droplets, two types of experiment are conducted, and the measured intensity distribution is compared with that predicted by theoretical computation. The observed extra-light leakage of dye-laser radiation trapped in the droplet can be grouped into quasi-instantaneous and cumulative effects. One set of experiments uses a variable number of 100-ps laser pulses because of the laser's low fluence at 0.1 GW/cm2. Quasi-instantaneous perturbations associated with an intensity-dependent index of refraction change are found to be important. Cumulative perturbations become evident as the number of 100-ps pulses increases. The second set of experiments uses one green laser beam and one near-IR laser beam, both with 7-ns duration, which because of the high fluence emphasize the electrostrictive- and temperature-related perturbations. Extra leakage from surface perturbations caused by the laser-induced temperature rise cannot be isolated but is found not to be dominant.
URI: http://hdl.handle.net/11536/3076
ISSN: 0740-3224
期刊: JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
Volume: 10
Issue: 4
起始頁: 620
結束頁: 632
顯示於類別:期刊論文


文件中的檔案:

  1. A1993KW38400010.pdf