PHOTOEXCITED LASER INTEGRATED OPTICAL SENSOR Russian patent published in 2019 - IPC G01N21/31 G01N21/55 

FIELD: measuring equipment.

SUBSTANCE: invention relates to measurement equipment and concerns a photoexcited laser integrated optical sensor. Sensor consists of an excitation source, a transparent substrate, a thin-film laser-active medium, a sensitive layer, and optical radiation output elements. Sensor includes an additional layer and two distributed Bragg reflectors. Sensitive layer is a film of polymethyl methacrylate doped with a chemical substance which is sensitive to an analyte with the effect of the appearance of a spectral absorption band in it when interacting with the analyte. Sensitive layer is deposited on the surface of the thin-film laser active medium based on polymethylmethacrylate and is integral with the same refractive index. Laser-active medium is a thin-film structure of polymethyl methacrylate doped with a laser dye with a low excitation threshold and having a spectral generation line which coincides with the absorption band of the sensitive layer.

EFFECT: increased sensitivity, reduced level of pumping, reduced generation threshold, expanded range of detected chemical compounds, reduced requirements to quality of exciting radiation and simplified setup of the device.

6 cl, 1 dwg