Femtosecond laser Fourier transform absorption spectroscopy

Details Femtosecond laser Fourier transform absorption spectroscopy Femtosecond laser Fourier transform absorption spectroscopy

2007-03-16

arxiv.org/abs/physics/0703169v1

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.

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