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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 35, Iss. 7 — Apr. 1, 2010
  • pp: 910–912

Tunable terahertz quantum cascade lasers with external gratings

Alan Wei Min Lee, Benjamin S. Williams, Sushil Kumar, Qing Hu, and John L. Reno  »View Author Affiliations


Optics Letters, Vol. 35, Issue 7, pp. 910-912 (2010)
http://dx.doi.org/10.1364/OL.35.000910


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Abstract

We demonstrate a frequency tunable external cavity terahertz quantum cascade laser using an abutted antireflection-coated silicon lens to reduce facet reflection and as a beam-forming element, with an external grating providing frequency selective optical feedback. Angle tuning of the grating allows a single longitudinal mode of the laser ridge to be selected, resulting in discontinuous tuning over a 165 GHz range around a center frequency of 4.4 THz. Another device exhibited 145 GHz of total tuning with 9 GHz of continuous tuning near the longitudinal modes of the laser.

© 2010 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

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: October 29, 2009
Revised Manuscript: January 12, 2010
Manuscript Accepted: January 15, 2010
Published: March 18, 2010

Citation
Alan Wei Min Lee, Benjamin S. Williams, Sushil Kumar, Qing Hu, and John L. Reno, "Tunable terahertz quantum cascade lasers with external gratings," Opt. Lett. 35, 910-912 (2010)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-35-7-910

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