Coherent light generators – Particular active media – Semiconductor
Patent
1998-06-12
2000-10-24
Font, Frank G.
Coherent light generators
Particular active media
Semiconductor
372 96, 356437, H01S 500
Patent
active
061378178
ABSTRACT:
A novel quantum cascade (QC) laser comprises a multiplicity of identical repeat units, with each repeat unit comprising an active region and an injector region. The injector region comprises quantum wells and barriers, selected to facilitate, under appropriate bias, resonant carrier transport from a lower energy level of a given active region to an upper energy level of an adjacent downstream active region. Carrier transition from the upper energy level to a lower energy level of an active region results in emission of infrared radiation. The laser is advantageously used in, e.g., a measurement system for detection of trace compounds in air.
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Baillargeon James Nelson
Capasso Federico
Cho Alfred Yi
Gmachl Claire F.
Hutchinson Albert Lee
Font Frank G.
Inzirillo Gioacchino
Lucent Technologies - Inc.
Pacher Eugene E.
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