Intracavity neodymium-glass laser spectrometer for 1.35 μ

A description is given of a neodymium-glass laser spectrometer with a dispersive cavity designed for operation in the 1.35–1.36 μ range. Its resolution is 0.2 cm^–1 and the sensitivity expressed in terms of the absorption coefficient is 10^–7 cm^–1. It is reported that the spectrometer is capable of recording the P(1) transition in the 1–3 band of hydrogen fluoride and the absorption spectrum of atmospheric water vapor.