Fiber winding device for optical fiber macro-bending test and macro-bending test method

Abstract

The invention discloses a fiber winding device for an optical fiber macro-bending test and a macro-bending test method.The fiber winding device comprises a support, a plurality of fiber winding columns and a plurality of guiding structures, and the multiple fiber winding columns are parallel to one another and movably connected to the support in the multiple radial directions of the same set circle; the plurality of guide structures are arranged on the support and respectively guide the plurality of fiber winding columns to move. On one hand, the fiber winding device can be used for simulating the conventional rewinding state of the optical fiber, so that the phenomena of non-uniform tightness, optical fiber looseness, different intervals of all circles of optical fibers and the like are avoided, and the influence of the operation method difference of experimenters on the test result can be reduced to the greatest extent; and on the other hand, only one fiber winding device and one-time winding are needed, the macro-bending test of various turns and various diameters can be realized, the processing cost of a plurality of metal cylinders is reduced, the working efficiency of the macro-bending test is improved, and the influence of damage to the optical fiber coating layer on the test result is avoided.

Description

technical field [0001] The invention belongs to the field of optical fiber technology, and in particular relates to a fiber winding device and a macrobending test method for optical fiber macrobending tests. Background technique [0002] Fiber bending is another cause of fiber scattering loss, caused by figure 1 The geometric ray theory of optical fiber light guiding can understand the reason why the fiber loss increases due to fiber bending. Normally, light guided in an optical fiber is incident on the core-cladding interface at an angle greater than the critical angle and propagates forward by total internal reflection. However, where a bend occurs in the fiber, the angle of incidence decreases; at smaller bends, the angle of incidence becomes much smaller than the critical angle, and the transmitted light exits the fiber. If described by the concept of mode, the energy of part of the conduction mode scatters into the fiber cladding. The additional bending loss is propo...

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Problems solved by technology

[0005] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a fiber winding device and a macrobending test method for optical fiber macrobending tests, which solve the following problems: (1) the existing fiber winding devices need different circular Switching the use of the barrel, the work efficiency is low, and it is easy to cause damage to the optical fiber coating;

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