Using the coherent backscattering technique, we have measured the transport mean-free-path lengths l<sub>t</sub> for photons in NdAl<sub>3</sub>(BO<sub>3</sub>)<sub>4</sub> powder, a promising solid-state random laser material. The developed model allows one to calculate l<sub>t</sub> as a function of the mean particle size <i>s</i> in tightly packed powder or sintered ceramic. The experimentally determined value of l<sub>t</sub> is in good agreement with the model prediction.
© 2003 Optical Society of America
Messaoud Bahoura and M. A. Noginov, "Determination of the transport mean free path in a solid-state random laser," J. Opt. Soc. Am. B 20, 2389-2394 (2003)