The linewidth of laser emission in random-scattering gain media is found to be broadened as the number of scatterers increases. This broadening is attributed to the reduction of amplification by stimulated emission as a result of the shortened total path length traversed by the backscattered light in a highly scattering medium. In addition, the spectral shift of the emission peak is found to depend on the dye concentration and the pumping power.
© 1995 Optical Society of America
Original Manuscript: December 9, 1994
Published: May 1, 1995
Weili Zhang, Nelson Cue, and K. M. Yoo, "Emission linewidth of laser action in random gain media," Opt. Lett. 20, 961-963 (1995)