The waveguide gas analyzer

Method of the absorption spectroscopy was used for creating the waveguide gas analyzers. The action of gas analyzer was based on evanescent field absorption in the coating medium of the optical waveguide. To supply miniaturisation and increase sensitivity of these devices we proposed to use as an absorption cell the spiral thin film waveguides, optical fibers, stripe waveguides et al. The different schemes of the gas analyzers based on the optical waveguides were considered.