Tunable terahertz quantum cascade lasers with external gratings
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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