TITLE

High-performance, homogeneous broad-gain quantum cascade lasers based on dual-upper-state design

AUTHOR(S)
Fujita, Kazuue; Edamura, Tadataka; Furuta, Shinichi; Yamanishi, Masamichi
PUB. DATE
June 2010
SOURCE
Applied Physics Letters;6/14/2010, Vol. 96 Issue 24, p241107
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A broad-gain quantum cascade laser design with dual-upper-state is proposed to clarify its own feasibility. Devices employing the proposed active region design exhibit homogeneously wide (>330 cm-1) electroluminescence spectra of which shapes are insensitive to voltage changes. A buried heterostructure laser, emitting at λ∼8.4 μm, demonstrates a high continuous-wave output power of 152 mW together with a high constant slope efficiency of 518 W/A at room temperature. In addition, the device performance is observed to be very insensitive to temperature change; T0-values of ∼306 K and constant slope efficiency over the wide temperature range, 280–400 K.
ACCESSION #
51526961

 

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