Scientific Results

Frequency metrology with quantum cascade lasers

Year: 2009

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

Autors Affiliation: Istituto Nazionale di Ottica Applicata (INOA) – CNR, Largo E. Fermi 6, 50125 Firenze, Italy; Laboratorio Europeo di Spettroscopie Non-lineari (LENS), via N. Carrara 1,50019 Sesto Fiorentino (FI), Italy

Abstract: We recently reported the first Doppler-limited absolute frequency measurement of CO2 transitions around 4.4 ┬Ám wavelength, by linking a DFB Quantum Cascade Laser (QCL) to an Optical Frequency Comb Synthesizer (OFCS). We further achieved sub-Doppler recording of these transitions, improving of about three orders of magnitude the measurement precision. We are exploring techniques able to significantly reduce the QCL jitter, in order to get metrological-grade QCLs for very demanding experiments in the frequency-domain. The latest experimental results in our group will be reported.

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KeyWords: Absolute frequency measurements; Doppler; Frequency domains; Frequency metrology; Measurement precision; Optical frequency combs; Three orders of magnitudes, Jitter; Lasers; Quantum cascade lasers; Spectroscopic analysis; Spectrum analysis, Infrared spectroscopy
DOI: 10.1117/12.813519

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