LASER GAS ANALYZER AND METHOD OF OPERATING THE LASER TO REDUCE NON-LINEARITY ERRORS

摘要

A method of operating a laser and a gas analyzer to reduce lowfrequency and high frequency power non-linearity errors passes a laser beamthrough a sample gas to a detector. Intensity measurements are taken andcompared to a reference set of measurements. The reference set ofmeasurements can be calculated by measuring pressure and temperature ofthe sample gas. The laser wavenumber tuning width is locked to tune a highfrequency of an absorption path fringe to a predetermined reference value. Theanalyzer can be operated without taking a reference set of measurements andthe analyzer is much smaller than previous analyzers.