Journal
PHYSICAL REVIEW A
Volume 77, Issue 1, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.77.013832
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We measured the ensemble-averaged spectral correlation functions and statistical distributions of spectral spacing and intensity for lasing modes in weakly scattering systems, and compared them to those of the amplified spontaneous-emission spikes. Their dramatic differences illustrate distinct physical mechanisms. Our numerical simulation revealed that even without reabsorption the number of potential lasing modes might be greatly reduced by local excitation of a weakly scattering system. The lasing modes can be drastically different from the quasimodes of the passive system, due to selective amplification of the feedback from the scatterers within the local gain region.
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