Spectral changes in fluorescence and lasing spectra were observed from a noncircularly deformed ink-doped ethanol jet, which was induced by a lateral gas flow. The distortion parameter was determined from the analysis of diffraction patterns to be as much as ~10%. <i>Q</i> -spoiling effects were clearly observed in the appearance of high- <i>Q</i> (~10<sup>7</sup>) modes in fluorescence and their disappearance in lasing. From the behavior of resonance modes, we concluded that the effective <i>Q</i> does not decrease so rapidly as predicted by the relation obtained from the ray-optics model. We also found that the signals leak out, with a wide angular spreading, mainly from near the boundary of the major axis, even for a large distortion parameter.
© 1997 Optical Society of America
Hee-Jong Moon, Kwang-Hoon Ko, Young-Chul Noh, Guang-Hoon Kim, Jai-Hyung Lee, and Joon-Sung Chang, "Observation of Q-spoiling ef fects on the resonance modes from a noncircularly deformed liquid jet," Opt. Lett. 22, 1739-1741 (1997)