The invention discloses an
optical fiber characteristic parameter measuring device. The
optical fiber characteristic parameter measuring device comprises a
laser, two single-mode fibers, two
optical fiber collimators, two optical
fiber couplers, two
beam splitters, two phase plates, a plurality of to-be-measured optical fibers, a rotary
Doppler effect generator, and a photoelectric
detector. The
laser generated by the
laser is output by the single-mode optical fibers, and is divided into two ways after collimation by the
beam splitters, and one way is coupled with the to-be-measured optical fibers after the modulation of the
phase plate, and the output light of the to-be-measured optical fibers and the other way of the laser are used to form a
light beam after being modulated into light of a specific mode, and the synthesized
light beam is transmitted into the rotary
Doppler effect generator to form
scattered light, and different frequency shifts occur, and at last, the fundamental mode of the
scattered light is filtered and detected by the photoelectric
detector, and in addition, by analyzing an energy curve acquired by the photoelectric
detector, propagation constants, losses, and other characteristic parameters supported by the optical fibers are analyzed. The optical
fiber characteristic parameter measuring device has advantages of easy operation and comprehensive analysis.