Abstract
An ultrashort-pulse Cr2+:ZnSe laser is a novel broadband source for sensitive high resolution molecular spectroscopy. A 130-fs pulse allows covering of up to 380 cm-1 spectral domain around 2.4 µm which is analyzed simultaneously with a 0.12 cm-1 (3.6 GHz) resolution by a Fourier-transform spectrometer. Recorded in 13 s, from 70-cm length absorption around 4150 cm-1, acetylene and ammonia spectra exhibit a 3800 signal-to-noise ratio and a 2.4·10-7 cm-1·Hz-1/2 noise equivalent absorption coefficient at one second averaging per spectral element, suggesting a 0.2 ppbv detection level for HF molecule. With the widely practiced classical tungsten lamp source instead of the laser, identical spectra would have taken more than one hour.
©2007 Optical Society of America
Full Article | PDF ArticleMore Like This
Edoardo Vicentini, Alessio Gambetta, Francesco Canella, Nicola Coluccelli, Paolo Laporta, and Gianluca Galzerano
Opt. Express 31(13) 21482-21492 (2023)
Florian Adler, Piotr Masłowski, Aleksandra Foltynowicz, Kevin C. Cossel, Travis C. Briles, Ingmar Hartl, and Jun Ye
Opt. Express 18(21) 21861-21872 (2010)
Feng Zhu, James Bounds, Aysenur Bicer, James Strohaber, Alexandre A. Kolomenskii, Christoph Gohle, Mahmood Amani, and Hans A. Schuessler
Opt. Express 22(19) 23026-23033 (2014)