I have a new publication on random lasers in Optics Express.
Yan Feng, Shenghong Huang, Guanshi Qin, Mitsuru Musha, and Ken-ichi Ueda, University of Electro-Communications
A microchip-type laser with multiple scattering from powder as necessary feedback is demonstrated. The laser consists of a transparent ceramic Nd:YAG microchip and a Nd:YAG powder tablet, operates at quasi-continuous- wave regime pumped by a laser diode array.
Opt. Exp.Vol. 12, No. 15 July 26, 2004 Page: 3307 – 3312
Yan Feng and Ken-ichi Ueda, University of Electro-Communications
We propose a random stack of resonant dielectric layers as a system for random-laser study. Owing to the Fabry–Perot resonance of the dielectric layers, the propagation of light in such systems is frequency dependent (a band structure). As a consequence, if the system is designed such that pump light is in passband while optical gain is in stop band, the laser threshold can be reduced dramatically compared with those of completely disordered systems.