Absolute frequency measurement of molecular transitions by a direct link to a comb generated around 3-microm

P Malara; P Maddaloni; G Gagliardi; P De Natale

doi:10.1364/oe.16.008242

Absolute frequency measurement of molecular transitions by a direct link to a comb generated around 3-microm

Opt Express. 2008 May 26;16(11):8242-9. doi: 10.1364/oe.16.008242.

Authors

P Malara¹, P Maddaloni, G Gagliardi, P De Natale

Affiliation

¹ Consiglio Nazionale delle Ricerche - Istituto Nazionale di Ottica Applicata, and European Laboratory for Nonlinear Spectroscopy (LENS), Comprensorio A.Olivetti, Via Campi Flegrei 34, 80078 Pozzuoli, Naples, Italy. [email protected]

PMID: 18545536
DOI: 10.1364/oe.16.008242

Abstract

A 3-microm continuous-wave difference-frequency source is directly referenced to a mid-infrared optical frequency comb synthesizer by measuring their beat-note signal by a fast HgCdTe detector. Absolute frequency metrology of molecular vibration spectra is demonstrated by locking the 3-microm coherent radiation to the nearest comb tooth and tuning the comb mode spacing across the Doppler-broadened absorption profile of a CH(4) ro-vibrational transition.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Computer Simulation
Computer-Aided Design*
Equipment Design
Equipment Failure Analysis
Filtration / instrumentation*
Filtration / methods
Models, Theoretical*
Molecular Probe Techniques / instrumentation*