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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 53, Iss. 20 — Jul. 10, 2014
  • pp: 4475–4480

Widely tunable quantum cascade laser-based terahertz source

Andriy A. Danylov, Alexander R. Light, Jerry Waldman, Neal Erickson, and Xifeng Qian  »View Author Affiliations


Applied Optics, Vol. 53, Issue 20, pp. 4475-4480 (2014)
http://dx.doi.org/10.1364/AO.53.004475


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Abstract

A compact, tunable, ultranarrowband terahertz source, Δν1MHz, is demonstrated by upconversion of a 2.324 THz, free-running quantum cascade laser with a THz Schottky-diode-balanced mixer using a swept, synthesized microwave source to drive the nonlinearity. Continuously tunable radiation of 1 μW power is demonstrated in two frequency regions: νLaser±0 to 50 GHz and νLaser±70 to 115 GHz. The sideband spectra were characterized with a Fourier-transform spectrometer, and the radiation was tuned through CO, HDO, and D2O rotational transitions.

© 2014 Optical Society of America

OCIS Codes
(190.4360) Nonlinear optics : Nonlinear optics, devices
(040.2235) Detectors : Far infrared or terahertz
(140.5965) Lasers and laser optics : Semiconductor lasers, quantum cascade
(300.6495) Spectroscopy : Spectroscopy, teraherz

ToC Category:
Spectroscopy

History
Original Manuscript: March 28, 2014
Manuscript Accepted: May 20, 2014
Published: July 4, 2014

Citation
Andriy A. Danylov, Alexander R. Light, Jerry Waldman, Neal Erickson, and Xifeng Qian, "Widely tunable quantum cascade laser-based terahertz source," Appl. Opt. 53, 4475-4480 (2014)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-53-20-4475


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References

  1. A. A. Danylov, A. R. Light, J. Waldman, N. R. Erickson, X. Qian, and W. D. Goodhue, “2.32  THz quantum cascade laser frequency-locked to the harmonic of a microwave synthesizer source,” Opt. Express 20, 27908 (2012). [CrossRef]
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  10. T. D. Varburg and K. M. Evenson, “Laser spectroscopy of carbon monoxide: a frequency reference for the far infrared,” IEEE Trans. Instrum. Meas. 42, 412–414 (1993). [CrossRef]

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