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Optics Letters

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  • Vol. 25, Iss. 4 — Feb. 15, 2000
  • pp: 230–232

High-power, continuous-wave, current-tunable, single-mode quantum-cascade distributed-feedback lasers at λ — 5.2 and λ — 7.95 μm

Claire Gmachl, Federico Capasso, Alessandro Tredicucci, Deborah L. Sivco, James N. Baillargeon, Albert L. Hutchinson, and Alfred Y. Cho  »View Author Affiliations


Optics Letters, Vol. 25, Issue 4, pp. 230-232 (2000)
http://dx.doi.org/10.1364/OL.25.000230


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Abstract

Quantum-cascade distributed-feedback lasers with high-power, continuous-wave (cw), tunable, single-mode emission are reported. The emission wavelengths are near 5.2 and 7.95 μm. The lasers are operated at liquid-nitrogen temperature and above. A maximum output power of >100 mW is obtained per facet at 80 K for both wavelengths, which is the result of careful positioning of the peak gain with respect to the Bragg wavelength. Continuous tuning with either heat-sink temperature or cw current is demonstrated. The tuning coefficients are 0.35 nm/K (5.2 μm) and 0.51 nm/K(7.95 μm) for thermal tuning and vary from 20 to 40 nm/A for tuning with current. The lasers are being used in high-resolution and high-sensitivity gas-sensing applications.

© 2000 Optical Society of America

OCIS Codes
(140.3070) Lasers and laser optics : Infrared and far-infrared lasers
(140.3600) Lasers and laser optics : Lasers, tunable
(140.5960) Lasers and laser optics : Semiconductor lasers

Citation
Claire Gmachl, Federico Capasso, Alessandro Tredicucci, Deborah L. Sivco, James N. Baillargeon, Albert L. Hutchinson, and Alfred Y. Cho, "High-power, continuous-wave, current-tunable, single-mode quantum-cascade distributed-feedback lasers at λ — 5.2 and λ — 7.95 μm," Opt. Lett. 25, 230-232 (2000)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-25-4-230

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