Coherent light generators – Particular resonant cavity – Distributed feedback
Patent
1997-05-07
1999-05-04
Bovernick, Rodney
Coherent light generators
Particular resonant cavity
Distributed feedback
372 92, 372 45, H01S 308, H01S 319
Patent
active
059011688
ABSTRACT:
It has been found that previously known quantum cascade (QC) lasers have a shortcoming that substantially decreases their usefulness as radiation sources for pollution monitoring and other potential applications that involve absorption measurements. Except at cryogenic temperatures, these lasers have to be driven in pulse mode and are inherently multimode. We have now established that this shortcoming can be overcome by provision of appropriate distributed feedback. Resulting lasers (QC-DFB lasers) can have single mode mid-IR output at or near room temperature, can have significant optical power, and be continuously tunable over a significant spectral region.
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Baillargeon James Nelson
Capasso Federico
Cho Alfred Yi
Faist Jerome
Gmachl Claire F.
Bovernick Rodney
Leung Quyen Phan
Lucent Technologies - Inc.
Pacher Eugen E.
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