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Coherent phase lock of a 9 μm quantum cascade laser to a 2 μm thulium optical frequency comb |
Optics Letters, Vol. 37, Issue 19, pp. 4083-4085 (2012)
http://dx.doi.org/10.1364/OL.37.004083
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Abstract
We demonstrate coherent phase locking of a room-temperature continuous-wave quantum cascade laser (QCL) at 9.1 μm to a Tm-fiber laser frequency comb centered at 2 μm, with an integrated residual phase error of 0.9 rad (30 mHz to 1.5 MHz). This resulted in a QCL linewidth reduction from 525 to 25 kHz at 1 ms observation time, limited by the linewidth of the free-running frequency comb.
© 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
(190.0190) Nonlinear optics : Nonlinear optics
(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: August 2, 2012
Manuscript Accepted: August 22, 2012
Published: September 26, 2012
Citation
Andrew A. Mills, Davide Gatti, Jie Jiang, Christian Mohr, Will Mefford, Livio Gianfrani, Martin Fermann, Ingmar Hartl, and Marco Marangoni, "Coherent phase lock of a 9 μm quantum cascade laser to a 2 μm thulium optical frequency comb," Opt. Lett. 37, 4083-4085 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-19-4083
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