Optical fiber vibration measuring system with low loss and subnano-resolution

The utility model provides an optical fiber vibration measuring system with low loss and subnano-resolution. The optical fiber vibration measuring system is characterized by having the following devices and connection relationships that a light source is driven by an ordinary driving power source; a vibration table to be detected and a micro-cantilever system are sequentially placed in the advancing direction of the emitting light of the light source; light transmitted by the light source is spread in a first optical fiber; instruments which need shift alignment related in the piezoelectric phase comprise a to-be-tested vibration table with the first optical fiber adhered thereon, a micro-cantilever system and a microscope; the microscope is arranged above the vibration table and the micro-cantilever system; the micro-cantilever system comprises an adjustable three-dimensional platform and a second optical fiber that is adhered on the three-dimensional platform; the tail end of the second optical fiber is pro