Method and device for testing pressure resistance of optical fiber coating

Abstract

The invention provides a method for testing the pressure resistance of optical fiber coating. The method includes the steps of firstly, placing a testing substrate on a work platform, allowing the middle part, in the length direction, of an optical fiber to pass the surface of the testing substrate, using tape to fix one free end of the optical fiber on the work platform, straightening the optical fiber to allow the same to coincide with a testing datum line on the testing substrate, and using tape to fix the other free end of the optical fiber on the work platform; secondly, lightly pressing a pressing plate identical with the testing substrate in specification on the testing substrate, and electrically connecting the two free ends of the optical fiber with an optical power meter; thirdly, recording the display value of the optical power meter at the moment, testing the optical power loss of the optical fiber according to a power transmission method in IEC60793-1-40, and recording the optical power loss as X0; fourthly, placing appropriate counter weight at the center of the pressing plate, testing the optical power loss of the optical fiber after the counter weight is placed according to the method in the third step, and recording the optical power loss as X1; fifthly, using the difference value between X1 and X0 as the optical power loss, under the pressure of the counter weight, of the optical fiber. By the method, testing stability and repeatability can be guaranteed.

Description

technical field [0001] The invention belongs to the technical field of optical fiber detection, and in particular relates to a method for testing the pressure resistance performance of an optical fiber coating and a measuring device thereof. Background technique [0002] like figure 1 As shown, the optical fiber is usually composed of a bare fiber 11, an inner coating 13 and an outer coating 15. The inner coating is generally soft and has a low modulus, and the outer coating is generally hard. The inner coating is used to protect the bare fiber. When the fiber is stressed, it can be released, and the outer coating can protect the fiber from the impact of external forces. Therefore, the thickness and selection of inner and outer coatings are very important for the later use of optical fibers. Appropriate selection of coating materials and coating thickness can ensure that when the optical fiber is subjected to a large compressive stress in a short period of time, the additio...

AI Technical Summary

Problems solved by technology

Therefore, the thickness and selection of inner and outer coatings are very important for the later use of optical fibers. Appropriate selection of coating materials and coating thickness can ensure that when the optical fiber is subjected to a large compressive stress in a short period of time, the additional loss of the optical fiber is not obvious. Improper coating Layer material and coating thickness will cause greater additional loss when the optical fiber is subjected to compressive stress, and in severe cases, the communication system will be temporarily paralyzed

[0003] How to evaluate the influence of optical fiber coating material and coating thickness on optical fiber performance, there is no very effective method at home and abroad at present. More evaluation of optical fiber coating effect is by testing the microbending performance of optical fiber, but the test of microbending performance is easily affected The influence of test conditions, especially the repeatability of the microbending force state of the optical fiber is poor, and the results of each measurement of force are different, and international research on microbending is limited to research reports

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