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Direct link of a mid-infrared QCL to a frequency comb by optical injection |
Optics Letters, Vol. 37, Issue 6, pp. 1011-1013 (2012)
http://dx.doi.org/10.1364/OL.37.001011
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Abstract
A narrow-linewidth comb-linked nonlinear source is used as master radiation to injection lock a room-temperature mid-infrared quantum cascade laser (QCL). This process leads to a direct lock of the QCL to the optical frequency comb, providing the unique features of narrow linewidth, absolute frequency, higher output power, and wide mode-hop-free tunability. The QCL reproduces the injected radiation within more than 94%, with a reduction of the frequency-noise spectral density by 3 to 4 orders of magnitude up to about 100 kHz, and a linewidth narrowing from a few MHz to 20 kHz.
© 2012 Optical Society of America
OCIS Codes
(120.3930) Instrumentation, measurement, and metrology : Metrological instrumentation
(140.3070) Lasers and laser optics : Infrared and far-infrared lasers
(140.3520) Lasers and laser optics : Lasers, injection-locked
(270.2500) Quantum optics : Fluctuations, relaxations, and noise
(140.3425) Lasers and laser optics : Laser stabilization
(140.5965) Lasers and laser optics : Semiconductor lasers, quantum cascade
ToC Category:
Lasers and Laser Optics
History
Original Manuscript: December 1, 2011
Manuscript Accepted: January 8, 2012
Published: March 7, 2012
Citation
S. Borri, I. Galli, F. Cappelli, A. Bismuto, S. Bartalini, P. Cancio, G. Giusfredi, D. Mazzotti, J. Faist, and P. De Natale, "Direct link of a mid-infrared QCL to a frequency comb by optical injection," Opt. Lett. 37, 1011-1013 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-6-1011
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