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Optical Engineering

Quantum cascade lasers for high-resolution spectroscopy
Author(s): Simone Borri; Saverio Bartalini; Pablo Cancio; Iacopo Galli; Giovanni Giusfredi; Davide Mazzotti; Paolo de Natale
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Paper 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.

Paper Details

Date Published: 1 November 2010
PDF: 9 pages
Opt. Eng. 49(11) 111122 doi: 10.1117/1.3498775
Published in: Optical Engineering Volume 49, Issue 11
Show Author Affiliations
Simone Borri, European Lab. for Non-linear Spectroscopy (Italy)
Saverio Bartalini, European Lab. for Non-linear Spectroscopy (Italy)
Pablo Cancio, European Lab. for Non-linear Spectroscopy (Italy)
Iacopo Galli, European Lab. for Non-linear Spectroscopy (Italy)
Giovanni Giusfredi, European Lab. for Non-linear Spectroscopy (Italy)
Davide Mazzotti, European Lab. for Non-linear Spectroscopy (Italy)
Paolo de Natale, Istituto Nazionale di Ottica (Italy)

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