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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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References

  1. C. Gmachl, J. Faist, J. N. Baillargeon, F. Capasso, C. Sirtori, D. L. Sivco, S. N. G. Chu, and A. Y. Cho, IEEE Photon. Technol. Lett. 9, 1090 (1997).
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  8. W. Schrenk, N. Finger, S. Gianordoli, L. Hvozdara, G. Strasser, and E. Gornik, “GaAs/AlGaAs distributed feedback quantum cascade lasers,” Appl. Phys. Lett. (to be published).
  9. C. Gmachl, F. Capasso, J. Faist, A. L. Hutchinson, A. Tredicucci, D. L. Sivco, J. N. Baillargeon, S. N. G. Chu, and A. Y. Cho, Appl. Phys. Lett. 72, 1430 (1998).
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  11. C. Gmachl, A. M. Sergent, A. Tredicucci, F. Capasso, A. L. Hutchinson, D. L. Sivco, J. N. Baillargeon, and A. Y. Cho, IEEE Photon. Technol. Lett. 11, 1369 (1999).

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