Coherent light generators – Particular active media – Semiconductor
Patent
1993-10-12
1995-05-30
Davie, James W.
Coherent light generators
Particular active media
Semiconductor
372 45, 372 92, H01S 319
Patent
active
054208807
ABSTRACT:
In a VCSEL, vertical cavity surface emitting laser, lateral traveling mode density is reduced by reducing the number of traveling modes available to spontaneous emission of photons in the active cavity region, to suppress spontaneous emission into lateral traveling modes, to increase spontaneous emission into axial normal modes, to lower lasing threshold. The sidewall of the active cavity region is contoured, preferably by a 90.degree. symmetrical V-shaped notch, to internally reflect laterally traveling photons, to suppress lateral traveling modes.
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"GaAs Vertical-Cavity Surface Emitting Lasers Fabricated By Reactive Ion Etching", Kent D. Choquette et al, IEEE Photonics Technology Letters, vol. 3, No. 10, Oct. 1991, pp. 859-862.
Tabatabaie Ned
Zhang Tu
Davie James W.
Wisconsin Alumni Research Foundation
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