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All-electrical frequency noise reduction and linewidth narrowing in quantum cascade lasers
Auteur(s)
Sargachev, Ilia
Maulini, Richard
Bismuto, Alfredo
Blaser, Stéphane
Gresch, Tobias
Bidaux, Yves
Müller, Antoine
In
Optics Letters, Optical society of America, 2014/39/23/6411-6414
Résumé
A novel all-electrical method of frequency noise reduction in quantum cascade lasers (QCLs) is proposed. Electrical current through the laser was continuously adjusted to compensate for fluctuations of the laser internal resistance, which led to an active stabilization of the optical emission frequency. A reduction of the linewidth from 1.7 MHz in the standard constant current mode of operation down to 480 kHz is demonstrated at 10-ms observation time when applying this method to a QCL emitting at 7.9 μm.
Identifiants
Type de publication
journal article
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