Time Dependent Theory for Random Lasers

Journal Article · Mon Jul 03 00:00:00 EDT 2000 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.85.70· OSTI ID:20217124

Jiang, Xunya; Soukoulis, C M

A model to simulate the phenomenon of random lasing is presented. It couples Maxwell's equations with the rate equations of electronic population in a disordered system. Finite difference time domain methods are used to obtain the field pattern and the spectra of localized lasing modes inside the system. A critical pumping rate P{sup c}{sub r} exists for the appearance of the lasing peaks. The number of lasing modes increases with the pumping rate and the length of the system. There is a lasing mode repulsion. This property leads to a saturation of the number of modes for a given size system and a relation between the localization length {xi} and average mode length L{sub m} . (c) 2000 The American Physical Society.

• OSTI ID: 20217124
• Journal Information: Physical Review Letters, Vol. 85, Issue 1; Other Information: PBD: 3 Jul 2000; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
LASERS
SEMICLASSICAL APPROXIMATION
MAXWELL EQUATIONS
AMPLIFICATION
THEORETICAL DATA