Broad-gain (Δλ/λ0</~0.4), temperature-insensitive (T<0~510K) quantum cascade lasers

Broad-gain operation of λ~8.7 μm quantum cascade lasers based on dual-upper-state to multiple-lower-state transition design is reported. The devices exhibit surprisingly wide (~500 cm(-1)) electroluminescence spectra which are very insensitive to voltage and temperature changes above room temperatur...

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Bibliographic Details
Published inOptics express Vol. 19; no. 3; pp. 2694 - 2701
Main Authors Fujita, Kazuue, Furuta, Shinichi, Dougakiuchi, Tatsuo, Sugiyama, Atsushi, Edamura, Tadataka, Yamanishi, Masamichi
Format Journal Article
LanguageEnglish
Published United States 31.01.2011
Subjects
Computer-Aided Design
Equipment Design
Equipment Failure Analysis
Lasers
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Summary:Broad-gain operation of λ~8.7 μm quantum cascade lasers based on dual-upper-state to multiple-lower-state transition design is reported. The devices exhibit surprisingly wide (~500 cm(-1)) electroluminescence spectra which are very insensitive to voltage and temperature changes above room temperature. With recourse to the temperature-insensitivity of electroluminescence spectra, the lasers demonstrate an extremely-weak temperature-dependence of laser performances: T0-value of 510 K, associated with a room temperature threshold current density of 2.6 kA/cm2. In addition, despite such wide gain spectra, room temperature, continuous wave operation of the laser with buried hetero structure is achieved.
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ISSN:1094-4087
1094-4087
DOI:10.1364/OE.19.002694