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Optics Letters

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  • Vol. 36, Iss. 16 — Aug. 15, 2011
  • pp: 3109–3111

Frequency noise of free-running 4.6 μm distributed feedback quantum cascade lasers near room temperature

L. Tombez, J. Di Francesco, S. Schilt, G. Di Domenico, J. Faist, P. Thomann, and D. Hofstetter  »View Author Affiliations


Optics Letters, Vol. 36, Issue 16, pp. 3109-3111 (2011)
http://dx.doi.org/10.1364/OL.36.003109


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Abstract

The frequency noise properties of commercial distributed feedback quantum cascade lasers emitting in the 4.6 μm range and operated in cw mode near room temperature ( 277 K ) are presented. The measured frequency noise power spectral density reveals a flicker noise dropping down to the very low level of < 100 Hz 2 / Hz at 10 MHz Fourier frequency and is globally a factor of 100 lower than data recently reported for a similar laser operated at cryogenic temperature. This makes our laser a good candidate for the realization of a mid-IR ultranarrow linewidth reference.

© 2011 Optical Society of America

OCIS Codes
(270.2500) Quantum optics : Fluctuations, relaxations, and noise
(300.3700) Spectroscopy : Linewidth
(140.5965) Lasers and laser optics : Semiconductor lasers, quantum cascade

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: March 30, 2011
Revised Manuscript: July 19, 2011
Manuscript Accepted: July 19, 2011
Published: August 10, 2011

Citation
L. Tombez, J. Di Francesco, S. Schilt, G. Di Domenico, J. Faist, P. Thomann, and D. Hofstetter, "Frequency noise of free-running 4.6 μm distributed feedback quantum cascade lasers near room temperature," Opt. Lett. 36, 3109-3111 (2011)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-36-16-3109


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