Tunable light source for use in photoacoustic spectrometers

摘要: The present invention provides a photoacoustic spectrometer that is field portable and capable of speciating complex organic molecules in the gas phase. has tunable light source ability to resolve fine structure these over large wavelength range. inventive includes an optical parametric oscillator (OPO) having combined coarse tuning. By pumping OPO with output from doped-fiber amplifier pumped by diode seed laser, able speciate mixtures parts per billion compounds, high efficiency small size, allowing for portability. In alternative embodiment, scanned controlling laser wavelength, thus resulting even more compact efficient design.