Coherent light generators – Particular active media – Semiconductor
Patent
1991-01-03
1992-05-19
Davie, James W.
Coherent light generators
Particular active media
Semiconductor
372 92, 372 99, H01S 319
Patent
active
051154412
ABSTRACT:
Optically transparent and electrically conductive cadmium tin oxide or indium tin oxide is employed in vertical cavity surface emitting lasers for vertical current injection. Continuous wave lasing at room temperature is achieved in GaAs/AlGaAs quantum well lasers. Devices with a 10 .mu.m optical window which also serves as a vertical current injection inlet give lasing threshold currents as low as 3.8 mA. The differential series resistance is (350-450) .OMEGA. with a diode voltage of (5.1-5.6) V at the lasing threshold. Far field pattern of the laser emission is Gaussian-like with a full width at half maximum of 7.degree..
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Kopf Rose F.
O'Bryan, Jr. Henry M.
Schubert Erdmann F.
Tu Li-Wei
Wang Yeong-Her
Alber Oleg E.
AT&T Bell Laboratories
Davie James W.
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