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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editors: Andrew Dunn and Anthony Durkin
  • Vol. 7, Iss. 11 — Oct. 31, 2012

High-power room-temperature continuous-wave mid-infrared interband cascade lasers

William W. Bewley, Chadwick L. Canedy, Chul Soo Kim, Mijin Kim, Charles D. Merritt, Joshua Abell, Igor Vurgaftman, and Jerry R. Meyer  »View Author Affiliations


Optics Express, Vol. 20, Issue 19, pp. 20894-20901 (2012)
http://dx.doi.org/10.1364/OE.20.020894


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Abstract

We demonstrate cw output powers >290 mW into a nearly diffraction-limited (M2 ≈2.2) output beam from an interband cascade laser operating at λ = 3.6-3.7 μm at room temperature. The interband cascade laser was designed for nearly equal electron and hole populations in the active region with heavy electron-injector doping, and was processed into narrow ridges mounted epitaxial side down on a copper heat sink. A 15.7-μm-wide, 4-mm-long ridge with the back facet coated for high reflection (HR) and an anti-reflection-coated front facet produced 253 mW of cw output power at T = 25°C into a beam with M2 ≈2.7. Furthermore, corrugating the sidewalls of the ridge leads to a 20% improvement in the brightness. A 15.7-μm-wide, 0.5-mm-long ridge with an HR-coated back facet and an uncoated front facet exhibited a maximum cw wall-plug efficiency of nearly 15% at room temperature.

© 2012 OSA

OCIS Codes
(140.2020) Lasers and laser optics : Diode lasers
(140.5960) Lasers and laser optics : Semiconductor lasers

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: June 6, 2012
Revised Manuscript: July 25, 2012
Manuscript Accepted: August 8, 2012
Published: August 28, 2012

Virtual Issues
Vol. 7, Iss. 11 Virtual Journal for Biomedical Optics

Citation
William W. Bewley, Chadwick L. Canedy, Chul Soo Kim, Mijin Kim, Charles D. Merritt, Joshua Abell, Igor Vurgaftman, and Jerry R. Meyer, "High-power room-temperature continuous-wave mid-infrared interband cascade lasers," Opt. Express 20, 20894-20901 (2012)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=oe-20-19-20894


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