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High Performance Quantum Cascade Lasers for Trace Gas Analysis

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Abstract

Quantum cascade (QC) lasers are fundamentally new semiconductor light sources in that: (1) their wavelength can be tailored over a wide range (from 3 to 17 microns) using the same combination of materials by a suitable choice of the active layer thickness, (2) their optical power is greatly enhanced by the cascade effect (one injected electron creates 25- 30 photons in traversing the active region).

© 1999 Optical Society of America

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