Special Section on Quantum and Interband Cascade Lasers

Quantum cascade lasers for high-resolution spectroscopy

[+] Author Affiliations
Simone Borri

Istituto Nazionale di Ottica—CNR, Largo Fermi 6, 50125 Firenze FI, Italy and European Laboratory for Nonlinear Spectroscopy, Via Carrara 1, 50019 Sesto Fiorentino FI, Italy

Saverio Bartalini

Istituto Nazionale di Ottica—CNR, Largo Fermi 6, 50125 Firenze FI, Italy and European Laboratory for Nonlinear Spectroscopy, Via Carrara 1, 50019 Sesto Fiorentino FI, Italy

Pablo Cancio

Istituto Nazionale di Ottica—CNR, Largo Fermi 6, 50125 Firenze FI, Italy and European Laboratory for Nonlinear Spectroscopy, Via Carrara 1, 50019 Sesto Fiorentino FI, Italy

Iacopo Galli

Istituto Nazionale di Ottica—CNR, Largo Fermi 6, 50125 Firenze FI, Italy and European Laboratory for Nonlinear Spectroscopy, Via Carrara 1, 50019 Sesto Fiorentino FI, Italy

Giovanni Giusfredi

Istituto Nazionale di Ottica—CNR, Largo Fermi 6, 50125 Firenze FI, Italy and European Laboratory for Nonlinear Spectroscopy, Via Carrara 1, 50019 Sesto Fiorentino FI, Italy

Davide Mazzotti

Istituto Nazionale di Ottica—CNR, Largo Fermi 6, 50125 Firenze FI, Italy and European Laboratory for Nonlinear Spectroscopy, Via Carrara 1, 50019 Sesto Fiorentino FI, Italy

Paolo De Natale

Istituto Nazionale di Ottica—CNR, Largo Fermi 6, 50125 Firenze FI, Italy and European Laboratory for Nonlinear Spectroscopy, Via Carrara 1, 50019 Sesto Fiorentino FI, Italy

Opt. Eng. 49(11), 111122 (November 22, 2010). doi:10.1117/1.3498775
History: Received April 22, 2010; Revised July 22, 2010; Accepted July 22, 2010; Published November 22, 2010; Online November 22, 2010
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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.

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© 2010 Society of Photo-Optical Instrumentation Engineers

Citation

Simone Borri ; Saverio Bartalini ; Pablo Cancio ; Iacopo Galli ; Giovanni Giusfredi, et al.
"Quantum cascade lasers for high-resolution spectroscopy", Opt. Eng. 49(11), 111122 (November 22, 2010). ; http://dx.doi.org/10.1117/1.3498775


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