The application discloses a Brillouin sensing device based on optical parallel differential pulse pairs and a working method, and belongs to the technical field of
optical fiber sensing. In view of the problem that the prior art is difficult to consider
high resolution, high precision and
fast measurement, the device used by the application comprises: an optical source module, which is used to generate an optical carrier; a first
optical path module, which is connected with the optical source module and is used to receive the optical carrier and generate optical parallel differential pulse pairs containing anti-Stokes and Stokes components and having different pulse lengths as pump light through double-frequency double-
sideband pulse modulation; a second
optical path module, which is connected with the optical source module and is used to generate double-
sideband probe light; and a sensing
optical fiber, which is connected with the first and second
optical path modules respectively and is used to receive the pump light and the probe light and directly complete
signal differentiation in the optical domain through stimulated
Brillouin scattering. Thus,
high resolution, high precision and
fast measurement are synergistically optimized, the
gain / loss mechanism can be flexibly switched, and the scene adaptability is enhanced.