Supercontinua for high resolution absorption multiplex infrared spectroscopy

Details Supercontinua for high resolution absorption multiplex infrared spectroscopy Supercontinua for high resolution absorption multiplex infrared spectroscopy

2007-11-24

arxiv.org/abs/0711.3853v1

Optics Letters 33, 3 (2008) 285-287

Physics

Optics

Optics Letters (2007) in press

Scientific paper

10.1364/OL.33.000285

Supercontinua generated in highly non-linear fibers by ultrashort-pulse lasers can be used for high resolution Fourier transform absorption spectroscopy. The practical advantages of these bright ultrabroadband light sources for spectroscopy are reported in the near-infrared region. A Cr^4+:YAG femtosecond laser broadened by an extruded soft-glass photonic crystal fiber, emitting from 1200 to 2200 nm and from 675 to 950 nm, provides a spectral radiance being 1x10^5 times higher than that of a 3000 K blackbody and 10^2 times higher than that of a synchrotron radiation. The C_2H_2 and NH_3 overtone spectra are recorded using this source within a few seconds.

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