Eksperimenter

Abstract

We report on a thulium doped silica fiber ASE source for absorption spectroscopy of CO(2). The average spectral power of this source was 2.3-6.1 mu W/nm. This low spectral power of this source posed limitation in the sensitivity of the system which was overcome by using an ultrashort pulsed Raman amplifier system with 50-125 mu W/nm average spectral power. This system produced CO(2) sensitivity better than 300 ppm making measurement of CO(2) possible at standard atmospheric concentrations.