Dynanmic Nonlinear Effect on Lasing in Random Media
We review our recent work on lasing in active random media. Light scattering, which had been regarded detrimental to lasing action for a long time, actually provided coherent feedback for lasing. We also trapped laser light in micrometer-sized random media. The trapping was caused by disorder-induced scattering and interference. This nontraditional way of light confinement has important application to microlasers. The threshold of ranodm laser can be reduced by incorporating some degree of order into an active random medium. Our calculation result shows that by optimizing the degree of order one can dramatically reduce the threshold of random laser to the values comparable to those of photonic bandgap defect lasers.
H. Cao et al., "Dynanmic Nonlinear Effect on Lasing in Random Media," Proceedings of SPIE - The International Society for Optical Engineering, vol. 5508, pp. 216-225, SPIE--The International Society for Optical Engineering, Aug 2004.
The definitive version is available at http://dx.doi.org/10.1117/12.559047
Complex Mediums V: Light and Complexity (2004: Aug. 4-5, Denver, CO)
Keywords and Phrases
Disordered Systems; Lasing; Microlasers; Random Laser; Acoustic Emissions; Amplification; Backscattering; Crystals; Doping (Additives); Feedback; Optimization; Resonance; Light Scattering
International Standard Serial Number (ISSN)
Article - Conference proceedings
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