Details

Autor(en) / Beteiligte

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

Titel

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

Ist Teil von

• Optics letters, 2014-11, Vol.39 (22), p.6411-6414

Ort / Verlag

United States

Erscheinungsjahr

2014

Quelle

OSA_美国光学学会数据库1

Beschreibungen/Notizen

• 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.