Mid-infrared absorption spectroscopy across a 14.4 THz spectral range using a broadband femtosecond optical parametric oscillator

K. A. Tillman, R. R J Maier, D. T. Reid, E. D. McNaghten

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

We describe the implementation of optical absorption spectroscopy in which a Ti:sapphire pumped femtosecond optical parametric oscillator based on periodically poled lithium niobate was used as a broadband source to directly acquire a midinfrared absorption spectrum of methane gas. Fourier-transform spectroscopy was performed using the idler output from the optical parametric oscillator to directly acquire spectra spanning over 600 nm (14.4 THz or 480 cm-1) with around 3 nm (78 GHz or 2.6 cm-1) resolution. This approach combines the advantages of spectroscopy using broadband thermal sources with the high power and excellent beam quality of a mode-locked laser source. © 2004 American Institute of Physics.

Original languageEnglish
Pages (from-to)3366-3368
Number of pages3
JournalApplied Physics Letters
Volume85
Issue number16
DOIs
Publication statusPublished - 18 Oct 2004

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