TDLAS ARCHITECTURE FOR WIDELY SPACED WAVELENGTHS Russian patent published in 2019 - IPC G01J3/42 G01N21/39 G02B6/04 

FIELD: physics.

SUBSTANCE: invention relates to spectroscopy and a system for absorption spectroscopy with tunable diode lasers with widely spaced wavelengths. System includes at least first and second tunable diode lasers generating laser light at first and second wavelengths, wherein laser light of the first and second wavelengths can not efficiently propagate along the same single-mode optical fiber. Radiation of the first laser passes through the first single-mode optical fiber, and radiation of the second laser passes through the second single-mode optical fiber. Optical fibers are assembled into fiber bundle, which is formed from far ends of first and second optical fibers, cleaned from their coatings and arranged with their shells adjacent to each other. Radiation from the fiber bundle is projected through the measurement zone by means of one or more feeding heads. Radiation passed through the measurement zone is received by means of one or more gripping heads located transversely the measurement zone and directed to at least one sensor.

EFFECT: technical result is wider spectral range of measurements.

20 cl, 7 dwg