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Sergachev I, Maulini R, Bismuto A, et al. All-electrical frequency noise reduction and linewidth narrowing in quantum cascade lasers. Opt Lett. 2014;39(22):6411-4doi: 10.1364/OL.39.006411.
Sergachev, I., Maulini, R., Bismuto, A., Blaser, S., Gresch, T., Bidaux, Y., Müller, A., Schilt, S., & Südmeyer, T. (2014). All-electrical frequency noise reduction and linewidth narrowing in quantum cascade lasers. Optics letters, 39(22), 6411-4. https://doi.org/10.1364/OL.39.006411
Sergachev, Ilia, et al. "All-electrical frequency noise reduction and linewidth narrowing in quantum cascade lasers." Optics letters vol. 39,22 (2014): 6411-4. doi: https://doi.org/10.1364/OL.39.006411
Sergachev I, Maulini R, Bismuto A, Blaser S, Gresch T, Bidaux Y, Müller A, Schilt S, Südmeyer T. All-electrical frequency noise reduction and linewidth narrowing in quantum cascade lasers. Opt Lett. 2014 Nov 15;39(22):6411-4. doi: 10.1364/OL.39.006411. PMID: 25490481.
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Opt Lett. 2014 Nov 15;39(22):6411-4. doi: 10.1364/OL.39.006411.

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

Optics letters

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

PMID: 25490481 DOI: 10.1364/OL.39.006411

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.

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