Stress uniform distribution type optical fiber micro-bending additional loss test device, test system and test method

Abstract

The invention discloses a stress uniform distribution type optical fiber micro-bending additional loss test device, a test system and a test method. The test device comprises a grooved bottom plate and a water bag limiting frame, and the upper surface of the grooved bottom plate is provided with a tooth groove along the width direction; when the test device is used for testing a tested optical fiber, a to-be-tested optical fiber is placed on the bottom plate with the groove, the water bag limiting frame is placed above the edge of the bottom plate with the groove, and then a water bag is placed in the water bag limiting frame, so that the to-be-tested optical fiber deforms along the shape of the tooth groove under the action of the gravity of the water bag containing water, and micro-bending is generated. According to the test device, the pressure used for enabling the to-be-tested optical fiber to generate micro-bending is generated by the water bag on the bottom plate with the groove, and the important problem in the IEC method can be effectively solved.

Description

technical field [0001] The invention relates to the technical field of optical fiber microbending additional loss testing, in particular to a stress uniform distribution type optical fiber microbending additional loss testing device, testing system and testing method. Background technique [0002] During the manufacture, installation and use of optical fiber cables, the optical fiber may be subjected to external pressure along the direction of the optical fiber, causing small, random, high-frequency micro-bending or bending of the optical fiber locally (usually the bending radius is not greater than 1mm) , resulting in a very small shift of the core relative to the fiber axis. This offset will cause the optical power transmitted inside the fiber to be coupled from the fundamental mode to the high-order mode, and mode coupling will occur, which will cause an increase in fiber loss, which is called fiber microbending additional loss, also known as fiber microbending sensitivit...

AI Technical Summary

Problems solved by technology

These methods have obvious shortcomings in practice. Method A has a complex mechanism and is not easy to realize accurately; method B has large differences in different batches of sandpaper, and the sand is easy to fall off, resulting in poor repeatability and is greatly affected by the control accuracy of the rewinding equipment; method D The operability is extremely poor; method C is difficult to reflect the difference in microbending sensitivity due to the short test distance and the use of sandpaper with minimal deformation

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