Studies on cavity-QED steady-state spectra of saturable absorbing liquid droplet dye lasers

• Main Authors: Yu, I-Ju, 游易儒
• Other Authors: Wen-Feng Hsieh
• Format: Others
• Language: zh-TW
• Published: 1996
• Online Access: http://ndltd.ncl.edu.tw/handle/20261402467118001018

碩士 === 國立交通大學 === 光電工程研究所 === 84 === We build up a micrometer diameter size saturable absorbing liquid droplet dye lasers in order to observe it' s steady-state properties. According to cavity-QED, the laser system has enhancement of spontaneous emission when the oscillation mode density and the mode distance increase. The simmulated results show that the larger spontaneous emission rate, the lower excitation threshold, which even completely disappear in a closed laser cavity. Experimental result also identify the linear proportion relation of the excitation and radition intensity, and the nearly disappearing excitation threshold. On the other hand,the structure of oscillationspectra of microdroplet dye lasers have the red shift when the concentration of dye increase, because of saturation absorption characteristics and the overlap between absorption and radiation crossection of dye in microdroplet cavity; besides,the range of oscillation spectra distributed widely,and the spectral lines appear other oscilases. We compare the experimental result with the prediction of theory, we find the nearly matched explanation.