| Literature DB >> 25836848 |
R Centeno, J Mandon, S M Cristescu, O Axner, F J M Harren.
Abstract
We combine an external cavity diode laser with noise-immune cavity-enhanced optical heterodyne molecular spectroscopy (NICE-OHMS) using current modulation. With a finesse of 1600, we demonstrate noise equivalent absorption sensitivities of 4.1 x 10(-10) cm(-1) Hz(-1/2), resulting in sub-ppbv detection limits for Doppler-broadened transitions of CH(4) at 6132.3 cm(-1), C(2)H(2) at 6578.5 cm(-1) and HCN at 6541.7 cm(-1). The system is used for hydrogen cyanide detection from sweet almonds.Entities:
Year: 2015 PMID： 25836848 DOI： 10.1364/OE.23.006277
Source DB: PubMed Journal: Opt Express ISSN： 1094-4087 Impact factor: 3.894