Laser Doppler tachometer based on ridge-shaped optical waveguides

The invention discloses a laser Doppler tachometer on the basis ridge optical waveguides. The laser Doppler tachometer comprises a beam splitter, a probe and a beam combiner, the beam splitter and the beam combiner are formed based on the ridged optical waveguides, the beam splitter is used for dividing a laser light source into a reference beam and a detecting beam, after the detecting beam is output from an output end of the probe and reaches a detected object, Doppler frequency shift of the detecting beam occurs, scattering light after the frequency shift enters a receiving end of the probe, and after the scattering light is interfered by coupling of the beam combiner and the reference beam, and a signal detected by a photoelectric detector is output. The laser Doppler tachometer can output speed information after transforming the speed information into an optical signal, and therefore perception speed changes can be efficiently coupled with single-model optical fiber, and the laser Doppler tachometer has the advantages of being high in sensitivity, resistant to electromagnetic radiation, easy to process and miniaturize, low in cost, and the like.