Special Section on Quantum and Interband Cascade Lasers

Shortened injector interband cascade lasers for 3.3- to 3.6-μm emission

[+] Author Affiliations
Adam Bauer

University of Würzburg, Technische Physikand and Wilhelm-Conrad-Röntgen-Research Center for Complex Material Systems, Am Hubland, D-97074 Würzburg, Germany

Matthias Dallner

University of Würzburg, Technische Physikand and Wilhelm-Conrad-Röntgen-Research Center for Complex Material Systems, Am Hubland, D-97074 Würzburg, Germany

Martin Kamp

University of Würzburg, Technische Physikand and Wilhelm-Conrad-Röntgen-Research Center for Complex Material Systems, Am Hubland, D-97074 Würzburg, Germany

Sven Höfling

University of Würzburg, Technische Physikand and Wilhelm-Conrad-Röntgen-Research Center for Complex Material Systems, Am Hubland, D-97074 Würzburg, Germany

Lukas Worschech

University of Würzburg, Technische Physikand and Wilhelm-Conrad-Röntgen-Research Center for Complex Material Systems, Am Hubland, D-97074 Würzburg, Germany

Alfred Forchel

University of Würzburg, Technische Physikand and Wilhelm-Conrad-Röntgen-Research Center for Complex Material Systems, Am Hubland, D-97074 Würzburg, Germany

Opt. Eng. 49(11), 111117 (November 19, 2010). doi:10.1117/1.3505831
History: Received April 01, 2010; Revised August 13, 2010; Accepted August 17, 2010; Published November 19, 2010; Online November 19, 2010
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Interband cascade lasers (ICLs) are very attractive light sources to cover the important spectral range from 3.3 to 3.6 μm, which is of major interest for hydrocarbon detection. We present ICLs emitting in this wavelength range that have a notably shortened injector region. Compared to a well-established reference design, the total length of one cascade is reduced by about 16% to only 63 nm. The benefits are a reduction of the number of heterointerfaces, a higher intensity of the optical mode in the active region, and easier strain compensation. Threshold current densities of devices using the new injector design are cut in half throughout the temperature range of operation, compared to devices with the reference design. Deeply etched ridge waveguide devices processed from structures with 14 cascades yielded maximum operation temperatures of 73°C in pulsed operation. Peak output powers exceed 100 mW at a heat-sink temperature of 15°C.

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© 2010 Society of Photo-Optical Instrumentation Engineers

Citation

Adam Bauer ; Matthias Dallner ; Martin Kamp ; Sven Höfling ; Lukas Worschech, et al.
"Shortened injector interband cascade lasers for 3.3- to 3.6-μm emission", Opt. Eng. 49(11), 111117 (November 19, 2010). ; http://dx.doi.org/10.1117/1.3505831


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