Title :
Spatio-temporal characteristics of filamentation in broad-area semiconductor lasers: experimental results
Author :
Marciante, John R. ; Agrawal, Govind P.
Author_Institution :
Air Force Res. Lab., Kirtland AFB, NM, USA
Abstract :
We experimentally study the spatial and temporal characteristics of filamentation in broad-area semiconductor lasers. Near-field measurements show that the sparing between filaments decreases as either the pumping level or the linewidth enhancement factor is increased. Spectral measurements reveal that spatial filaments are accompanied by periodic or chaotic temporal variations. Our experimental results show excellent qualitative agreement with a theory based on a linear stability analysis of the rate equations for an infinitely wide stripe laser.
Keywords :
laser stability; laser theory; laser variables measurement; optical chaos; optical pumping; semiconductor lasers; broad-area semiconductor lasers; chaotic temporal variations; filamentation; filaments; infinitely wide stripe laser; linear stability analysis; linewidth enhancement factor; near-field measurements; periodic variations; pumping level; rate equations; spatial characteristics; spatial filaments; spatio-temporal characteristics; spectral measurements; temporal characteristics; Chaos; Laser beams; Laser modes; Laser stability; Laser theory; Optical beams; Optical pumping; Power lasers; Pump lasers; Semiconductor lasers;
Journal_Title :
Photonics Technology Letters, IEEE
