Absolute frequency spectroscopy of CO2 lines at around 2.09 μm by combined use of an Er:fiber comb and a Ho:YLF amplifier

The low-frequency tail of an octave-spanning supercontinuum (SC) generated by an Er:fiber comb is enhanced by a multipass Ho:YLF amplifier and used in a sum-frequency-generation scheme to obtain absolute referencing of a single-mode Tm-Ho:YAG laser tunable around 2.09 μm. By tuning the comb repetiti...

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Veröffentlicht in:	Optics letters 2011-10, Vol.36 (19), p.3921-3923
Hauptverfasser:	GATTI, D, COLUCCELLI, N, GAMBETTA, A, DI LIETO, A, TONELLI, M, GALZERANO, G, LAPORTA, P, MARANGONI, M
Format:	Artikel
Sprache:	eng
Schlagworte:	Exact sciences and technology Frequency conversion harmonic generation, including high-order harmonic generation Fundamental areas of phenomenology (including applications) Measurements common to several branches of physics and astronomy Metrology, measurements and laboratory procedures Nonlinear optics Optics Physics Time and frequency
Online-Zugang:	Volltext
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Beschreibung
Zusammenfassung:	The low-frequency tail of an octave-spanning supercontinuum (SC) generated by an Er:fiber comb is enhanced by a multipass Ho:YLF amplifier and used in a sum-frequency-generation scheme to obtain absolute referencing of a single-mode Tm-Ho:YAG laser tunable around 2.09 μm. By tuning the comb repetition frequency, the probing laser is scanned across the absorption lines of a CO(2) gas sample and highly accurate absorption profiles are measured. This approach can be readily scaled to any wavelength above ~2 μm.
ISSN:	0146-9592 1539-4794
DOI:	10.1364/OL.36.003921