Scientific Results

Quantum cascade lasers for high-resolution spectroscopy

Year: 2010

Authors: Borri S., Bartalini S., Cancio P., Galli I., Giusfredi G., Mazzotti D., De Natale P.

Autors Affiliation: Ist Nazl Ottica, CNR, I-50125 Florence, Italy; European Lab Nonlinear Spect, I-50019 Sesto Fiorentino Fi, Italy

Abstract: Despite the growing interest that quantum cascade lasers (QCLs) are gaining, they still present a few unclear aspects of their fundamental properties, such as spectral purity, that need to be deeply investigated when aiming to make these innovative laser sources suitable for high-resolution spectroscopy and metrology. This paper is a review of our efforts towards QCL-based high-resolution spectroscopy and of our experimental investigation of QCLs\\\’ frequency noise, aimed to discover the ultimate performances attainable by QCLs and to develop the experimental techniques required to achieve them. Our results, confirmed by several independent measurements, show that QCLs have a very small intrinsic linewidth buried under a large frequency-noise background. The development of appropriate frequency stabilization techniques will make QCLs well suited for high-resolution spectroscopy and metrology in the mid and far IR. (C) 2010 Society of Photo-Optical Instrumentation Engineers

Journal/Review: OPTICAL ENGINEERING

Volume: 49 (11)      Pages from: 111122  to: 111122

More Information: This work was partially funded by Ente Cassa di Risparmio di Firenze, by Consiglio Nazionale delle Ricerche and the other European research funding agencies participating in the European Science Foundation EUROCORES Program EUROQUAM-CIGMA, and by Regione Toscana through the project Capacita Tecnologica e Operativa della Toscana per l\’Utilizzo dello Spazio (CTOTUS),in the framework of POR-CReO 2007-2013, axis 1, Activity 1.1, Action line d.
KeyWords: Experimental investigations; Experimental techniques; Frequency noise; Frequency stabilization; Fundamental properties; High resolution; High-resolution spectroscopy; Independent measurement; Laser sources; Quantum cascades; Spectral purity, Molecular spectroscopy; Quantum cascade lasers; Spectroscopic analysis; Units of measurement, Infrared lasers
DOI: 10.1117/1.3498775

Citations: 13
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English