Title :
Applications of supercontinuum sources: Incoherent broadband cavity-enhanced absorption spectroscopy
Author :
Aalto, A. ; Genty, Goery ; Toivonen, Juha ; Laurila, Tomi
Author_Institution :
Dept. of Phys., Tampere Univ. of Technol., Tampere, Finland
Abstract :
We study experimentally the application of supercontinuum (SC) sources in incoherent broadband cavity-enhanced absorption spectroscopy (IBB-CEAS). By carefully tailoring the SC spectrum to match the high reflectivity bandwidth of the mirrors, an unprecedented spectral brightness can be achieved at wavelengths where the effective absorption path length exceeds 40 km, making the fiber-based SC an ideal match for the simple and robust IBB-CEAS technique. We demonstrate the potential of SC sources in broadband measurement of weak overtone transitions of carbon dioxide and methane and compare its performances with that of typical superluminescent diode (SLD) source.
Keywords :
brightness; carbon compounds; fibre lasers; mirrors; organic compounds; supercontinuum generation; superluminescent diodes; CO2; IBB-CEAS technique; SC spectrum; SLD; broadband measurement; effective absorption path length; fiber-based SC; high reflectivity bandwidth; incoherent broadband cavity-enhanced absorption spectroscopy; methane; mirrors; spectral brightness; supercontinuum sources; superluminescent diode source; weak overtone transitions; Absorption; Bandwidth; Broadband communication; Cavity resonators; Mirrors; Spectroscopy; Superluminescent diodes; Cavity-enhanced absorption spectroscopy; Nonlinear optics; Supercontinuum generation; fibers;
Conference_Titel :
Laser Dynamics and Nonlinear Photonics, 2013 Sixth "Rio De La Plata" Workshop on
Conference_Location :
Montevideo
DOI :
10.1109/LDNP.2013.6777408
