Title :
Experimental investigation of guiding mechanisms in large area VCSELs
Author :
Raddatz, L. ; White, I.H. ; Nowell, M.C. ; Tan, M.R.T. ; Weber, A.G. ; Wang, S.-Y.
Author_Institution :
Sch. of Phys., Bath Univ., UK
fDate :
30 Oct-2 Nov 1995
Abstract :
We report on a novel technique involving spatially and spectrally resolved measurements of the spontaneous and stimulated emission from a VCSEL, which allows the mode structure, carrier density, and nett cavity loss to be mapped. The measurements allow ready assessment of optical guiding in the structure. It is found that in large area devices with low ohmic heating, the guiding is dominated by free carrier effects
Keywords :
carrier density; laser modes; laser variables measurement; spontaneous emission; stimulated emission; surface emitting lasers; waveguide lasers; carrier density; large area VCSELs; mode structure; nett cavity loss; ohmic heating; optical guiding; spatially resolved measurements; spectrally resolved measurements; spontaneous emission; stimulated emission; Fiber lasers; Gallium arsenide; Lenses; Optical coupling; Optical fiber devices; Optical refraction; Optical variables control; Spontaneous emission; Threshold current; Vertical cavity surface emitting lasers;
Conference_Titel :
Lasers and Electro-Optics Society Annual Meeting, 1995. 8th Annual Meeting Conference Proceedings, Volume 1., IEEE
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-2450-1
DOI :
10.1109/LEOS.1995.484790
