Direct link of a mid-infrared QCL to a frequency comb by optical injection

Year: 2012

Authors: Borri S., Galli I., Cappelli F., Bismuto A., Bartalini S., Cancio P., Giusfredi G., Mazzotti D., Faist J., De Natale P.

Autors Affiliation: Istituto Nazionale di Ottica (INO), Consiglio Nazionale Delle Richerche (CNR), Largo E. Fermi 6, 50125 Firenze FI, Italy; LENS-European Laboratory for Non-linear Spectroscopy, Via Carrara 1, 50019 Sesto Fiorentino FI, Italy; Dipartimento di Fisica e Astronomia, Università di Firenze, Via Sansone 1, 50019, Sesto Fiorentino FI, Italy; Institut für Quantenelektronik, Eidgenössische Techniche Hochshule Zürich (ETHZ), Zürich, CH-8072, Switzerland

Abstract: A narrow-linewidth comb-linked nonlinear source is used as master radiation to injection lock a room-temperature mid-infrared quantum cascade laser (QCL). This process leads to a direct lock of the QCL to the optical frequency comb, providing the unique features of narrow linewidth, absolute frequency, higher output power, and wide mode-hop-free tunability. The QCL reproduces the injected radiation within more than 94%, with a reduction of the frequency-noise spectral density by 3 to 4 orders of magnitude up to about 100 kHz, and a linewidth narrowing from a few MHz to 20 kHz. (C) 2012 Optical Society of America

Journal/Review: OPTICS LETTERS

Volume: 37 (6)      Pages from: 1011  to: 1013

More Information: This work was financially supported by Ente Cassa di Risparmio di Firenze, Regione Toscana through the projects CTOTUS and SIMPAS in the framework of POR-CReO FESR 2007-2013, and the Swiss National Foundation under the NCCR project Quantum Photonics.
KeyWords: Absolute frequency; Direct links; Frequency combs; Injection lock; Linewidth narrowing; Mid-infrared quantum cascade; Midinfrared; Mode-hop-free; Narrow-line width; Nonlinear source; Optical frequency combs; Optical injection; Orders of magnitude; Output power; Room temperature; Tunabilities; Unique features, Infrared devices; Linewidth; Quantum cascade lasers, Direct injection
DOI: 10.1364/OL.37.001011

Citations: 45
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