Physics – Optics
Scientific paper
2007-03-16
Optics Letters 32, 12 (15/06/2007) 1677-1679
Physics
Optics
Optics letters in press, in press (2007) in press
Scientific paper
10.1364/OL.32.001677
A femtosecond mode-locked laser is used for the first time as a broadband infrared source for high resolution Fourier transform absorption spectroscopy. Demontration is made with a Cr^4+:YAG laser. The entire nu_1+nu_3 vibration-rotation band region of acetylene, observed after passing through a single pass 80-cm long cell, is simultaneously recorded between 1480 and 1600 nm, in 7.9 s with a signal to noise ratio equal to 1000. Two hot bands of the most abundant acetylene isotopologue and the n1+n3 band of the ^13C^12CH_2 are also present. The noise equivalent absorption coefficient at one second averaging is equal to 7 10^{-7} cm^{-1}.Hz^{-1/2} per spectral element.
Druon Frederic
Georges Patrick
Guelachvili Guy
Mandon Julien
Picqué Nathalie
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