General linewidth formula for steady-state multimode lasing in arbitrary cavities

Abstract

A formula for the laser linewidth of arbitrary cavities in the multimode non-linear regime is derived from a scattering analysis of the solutions to semiclassical laser theory. The theory generalizes previous treatments of the effects of gain and openness described by the Petermann factor. The linewidth is expressed using quantities based on the non-linear scattering matrix, which can be computed from steady-state ab initio laser theory; unlike previous treatments, no passive cavity or phenomenological parameters are involved. We find that low cavity quality factor, combined with significant dielectric dispersion, can cause substantial deviations from the Schawlow-Townes-Petermann theory.

5 pages, 2 figures

References in corpus (6)

• Strong Interactions in Multimode Random Lasers
• Supporting Online Material for "Strong Interactions in Multimode Random Lasers"
• Self-consistent multi-mode lasing theory for complex or random lasing media
• Theory of the spatial structure of non-linear lasing modes
• Quantitative Verification of Ab Initio Self-consistent Laser Theory
• Excess quantum noise due to mode nonorthogonality in dielectric microresonators

Cited by in corpus (6)

• Reversing the Pump-Dependence of a Laser at an Exceptional Point
• General phase-diagram of multimodal ordered and disordered lasers in closed and open cavities
• Ab-initio multimode linewidth theory for arbitrary inhomogeneous laser cavities
• Steady-state ab initio laser theory for complex gain media
• Noise Properties of Coherent Perfect Absorbers and Critically-coupled Resonators
• Generalized Sub-Schawlow-Townes Laser Linewidths Via Material Dispersion