A diode laser pumping and linear cavity system for gas detection through cavity intracavity laser spectroscopy (DIODE LASER-PUMPED AND LINDEAR CAVITY SYSTEMS FOR GAS DETECTION VIA INTRACAVITY LASER SPECTROSCOPY)

摘要

The contaminants are optically detected at concentrations between parts per million (ppm) and levels per ppt (ppt) using intracavity laser spectroscopy (ILS) techniques. An optically pumped solid state laser (ILS laser) 500 is employed as the detector. The ILS laser 500 includes an ion doping determination medium 507 housed in a laser cavity 902 that is optically pumped by a pumping source 100. A gas sample containing gas contaminants is placed on one side of the ion doping crystal 507 inside the laser cavity 902. The output of the ILS laser 500 is detected and analyzed (by way of its spectroscopic sign) to identify the gas species. The concentration of the gaseous species can be determined from this spectrometer arc. In a first embodiment of the present invention, the ILS laser 500 includes an ion doping crystallization medium 507 optically pumped by a semiconductor diode laser 500. In a second embodiment of the present invention, the ILS laser 500 includes an ion doping crystallization medium 507 housed in a linear radar cavity 902. Using the semiconductor diode laser 914 and / or the linear laser cavity 902, the ILS laser 500 can be designed to be relatively small and compact compared to other structures. Small / small size gas detection systems are suitable for a wide range of practical applications.