Martinez, O. E., authorMarconi, Mario Carlo, authorDiodati, F. P., authorOptical Society of America, publisher2007-01-032007-01-031985Marconi, M. C., O. E. Martinez, and F. P. Diodati, Q Switching by Self-Focusing, Optics Letters 10, no. 3 (August 1985): 402-404.http://hdl.handle.net/10217/67858A novel passive technique for obtaining short-laser-pulse emission is presented. A cell with a high-second-order refractive-index liquid is included in an unstable laser cavity. The external self-focusing introduced by the cell at higher optical intensities reduces the diffraction losses, producing modulation of the gain and Q switching of the cavity. Compared with saturable absorbers, this method provides better mode quality, avoids filamentary emission, and is not restricted in wavelength. Experimental results are presented that are in good agreement with the numerical model developed.born digitalarticleseng©1985 Optical Society of America.Copyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright.Text