OPTOACOUSTIC SENSOR BASED ON STRUCTURAL OPTICAL FIBER Russian patent published in 2021 - IPC A61B8/12 A61B18/22 G01N21/00 

FIELD: medicine.

SUBSTANCE: group of inventions relates to medicine, namely to optoacoustic sensors. The optoacoustic sensor includes a structured optical fiber with a hollow core, functionally connected to a multilayer Bragg reflector with a reflection band in a given range. The optoacoustic sensor is configured to deliver exciting pulsed laser radiation in the visible range, near and middle infrared range, passed without significant attenuation through a structural optical fiber and passed through a multilayer Bragg reflector. The Bragg reflector is configured to transmit exciting radiation in the visible range, near and middle infrared range, with the exception of the reflection band in a given range, to an object capable of absorbing said radiation and generating an acoustic signal. The optoacoustic sensor is configured to detect the specified acoustic signal, which affects the Bragg reflector, causing it to oscillate, by registering the frequency and amplitude of the reflector oscillations by an optical method based on interferometry using radiation in the Bragg reflector reflection band in a given range.

EFFECT: provided is possibility of simultaneously providing illumination of the investigated sample with pulsed laser radiation and registration of an acoustic signal by an optical method.

9 cl, 7 dwg