Optical fiber characteristic parameter measuring device

Abstract

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.

Description

technical field [0001] The invention belongs to the technical field of optical fiber characteristic parameter measurement, and more specifically relates to an optical fiber characteristic parameter measurement technology based on the rotating Doppler effect. Background technique [0002] Optical fibers have been widely used in various fields, such as optical communication, sensing, optical devices and so on. Therefore, analyzing the characteristic parameters of optical fibers is a very important basic requirement. With the development of high-capacity optical fiber communication technology, optical fiber media has gradually developed from traditional single-mode optical fiber transmission to new types of optical fiber carriers such as few-mode optical fibers based on mode multiplexing. In general, analyzing the characteristic parameters of few-mode fibers is to analyze various performance parameters of the eigenmodes supported by the fiber, such as loss, dispersion, and so ...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the above defects or improvement needs of the prior art, the present invention provides an optical fiber characteristic parameter measuring instrument based on the rotating Doppler effect, which can measure various intrinsic parameters supported by the optical fiber to be tested at a certain wavelength at one time. The propagation constant and loss of the mode can overcome the problems of cumbersome operation, single function and long time consumption in the existing technology

Images