Intracavity neodymium-glass laser spectrometer with a dispersive resonator

A description is given of a neodymium-glass laser spectrometer with a dispersive resonator. This spectrometer operates in the 9230–9520 cm^–1 range with a resolution between 0.1 and 0.02 cm^–1 and can be used to detect absorption characterized by a coefficient of 10^–7 cm^–1. This spectrometer was used to obtain a low-resolution record of the P branch of the 12⁰3 band, the 04⁰3 band, and the "hot" 13¹3→01¹0 transition in carbon dioxide gas as well as the absorption spectra of atmospheric air and water vapor. A high-resolution record was obtained of the edge of the 04⁰3 band and the distances between the lines were measured.