Random laser
Random lasers are disordered optical media that are excited to emit lasers . Experimental and theoretical studies show that the radiation from random lasers differs from the radiation from thermal light sources as well as from conventional laser light .
In a certain sense, random lasers lie between an ordinary Fabry-Pérot laser and an incandescent lamp : like an incandescent lamp, they emit in all spatial directions. However, their light is of higher coherence . Just as in ordinary lasers follow the photons of Poisson statistics . However, the coherence time of random laser light is always shorter than that of conventional lasers, since random lasers have greater coupling-out losses.
Random lasers can be produced in a flexible form, as a film, cluster or in solution.
Web links
- World of Physics: Secret of the random laser revealed. Retrieved November 17, 2019 .
Individual evidence
- ^ Johannes Fallert, Roman JB Dietz, Janos Sartor, Daniel Schneider, Claus Klingshirn, Heinz Kalt: Co-existence of strongly and weakly localized random laser modes . In: Nature Photonics . tape 3 , no. 5 , May 2009, p. 279-282 , doi : 10.1038 / nphoton.2009.67 .