2011/11/08 by Regine Frank, Frank, Regine, Andreas Lubatsch +3
Engineering · Physics and Astronomy · #Disordered Systems and Neural Networks (cond-mat.dis-nn) #FOS: Physical sciences #Materials Science (cond-mat.mtrl-sci) #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Optics (physics.optics) #Other Condensed Matter (cond-mat.other) #Photonic and Optical Devices #Random lasers and scattering media #Semiconductor Lasers and Optical Devices #cond-mat.dis-nn #cond-mat.mes-hall #cond-mat.mtrl-sci #cond-mat.other #physics.optics
paper · pdf · doi:10.48550/arxiv.1111.1906
openalex publication_date 2011/11/08 · arxiv created 2012/03/26 · arxiv updated 2012/03/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In any quantum or wave system dissipation leads to decoherence. Therefore, it was surprising in first instance when experiments on strongly lossy random lasers showed unambiguously by measurements of the photon statistics and of the lasing mode volume that coherent feedback is possible in such systems3-5,8. In coherent-feedback lasers the photons form a far-from-equilibrium condensate in the sense that a single quantum state is occupied by a macroscopic number of photons15. We demonstrate that the lossy dynamics of random lasers alone imply a three dimensional finite lasing mode extent, thus resolving the puzzle about coherent feedback without resonator. Our theory of random lasing including nonlinear gain and gain saturation predicts a characteristic dependence of this lasing mode volume on the pump intensity, which can be tested experimentally.