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All-electrical frequency noise reduction and linewidth narrowing in quantum cascade lasers.

作者信息

Sergachev Ilia, Maulini Richard, Bismuto Alfredo, Blaser Stéphane, Gresch Tobias, Bidaux Yves, Müller Antoine, Schilt Stéphane, Südmeyer Thomas

出版信息

Opt Lett. 2014 Nov 15;39(22):6411-4. doi: 10.1364/OL.39.006411.

DOI:10.1364/OL.39.006411
PMID:25490481
Abstract

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.

摘要

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