Abstract
A sensor using a single distributed-feedback (DFB) diode laser at 1.57 μm for the simultaneous measurement of CO<sub>2</sub> and CO concentration at elevated temperatures is developed. A proper line pair near 6361.250 and 6361.344 cm<sup>–1</sup> is chosen based on absorption strength, separation of the two lines, and isolation from interference of neighboring transitions of the major combustion gases. The concentrations of CO<sub>2</sub> and CO are inferred from their wavelength modulation spectroscopy (WMS) 1ƒ-normalized absorption-based WMS-2ƒ signal peak heights. The CO<sub>2</sub> and CO concentration measurements are within 3.3% and 5% of the expected values over the full temperature range.
PDF Article
More Like This
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription