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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Anthony J. Campillo
  • Vol. 32, Iss. 19 — Oct. 1, 2007
  • pp: 2840–2842

High-power and high-temperature THz quantum-cascade lasers based on lens-coupled metal–metal waveguides

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


Optics Letters, Vol. 32, Issue 19, pp. 2840-2842 (2007)
http://dx.doi.org/10.1364/OL.32.002840


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Abstract

A metal–metal waveguide quantum cascade laser with an abutted silicon hyperhemispherical lens is demonstrated at 4.1 THz . The device produced 145 mW of peak pulsed power at 5 K with a wall-plug power efficiency of 0.7%, lasing up to a maximum operating temperature of 160 K . The far-field beam pattern has a full width at half-maximum value of 4.8 ° in the H plane. The same device produced 26 mW of peak power using a Winston cone instead of a lens, lasing up to 165 K . The large increase in output power is mainly attributed to an increase in collection efficiency.

© 2007 Optical Society of America

OCIS Codes
(140.0140) Lasers and laser optics : Lasers and laser optics
(140.3070) Lasers and laser optics : Infrared and far-infrared lasers

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: June 8, 2007
Revised Manuscript: August 11, 2007
Manuscript Accepted: August 12, 2007
Published: September 25, 2007

Citation
Alan Wei Min Lee, Qi Qin, Sushil Kumar, Benjamin S. Williams, Qing Hu, and John L. Reno, "High-power and high-temperature THz quantum-cascade lasers based on lens-coupled metal-metal waveguides," Opt. Lett. 32, 2840-2842 (2007)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-32-19-2840

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