Optical fiber bundle sleeve, preparation method of optical fiber bundle sleeve and preparation method of multi-core optical fiber coupler

Abstract

The invention relates to a preparation method of an optical fiber bundle sleeve, the optical fiber bundle sleeve and a preparation method of a multi-core optical fiber coupler, the optical fiber bundle sleeve is used for plugging a single-mode optical fiber so that the single-mode optical fiber and the multi-core optical fiber are enabled to be welded and the multi-core optical fiber coupler can be formed, and the preparation method comprises the following steps: selecting a plurality of first tube bodies according to the multi-core optical fiber; stacking the first tube bodies into a tube bundle according to the geometric arrangement of the fiber core circle centers of the multi-core optical fibers; introducing gas into the pipe hole of the first pipe body, carrying out fusion drawing, and meanwhile, adjusting the air pressure value to enable the pipe hole of the first pipe body to form an optical fiber inserting hole and obtain an optical fiber bundle sleeve, wherein the optical fiber inserting hole meets the conditions that d is greater than d1, d-d1 is located in a first set interval, d is the inner diameter of the optical fiber inserting hole, and d1 is the diameter of a single-mode optical fiber for inserting into the optical fiber inserting hole, the distance between adjacent optical fiber plugging holes is equal to the distance between adjacent fiber cores in the multi-core optical fiber. According to the invention, the problems of large coupling loss and uneven coupling between fiber cores in the prior art can be solved.

Description

technical field [0001] The present application relates to the technical field of optical fiber coupling, in particular to an optical fiber bundle sleeve, a preparation method thereof, and a preparation method of a multi-core optical fiber coupler. Background technique [0002] The optical fiber communication network is the core foundation supporting the rapid development of large-capacity, high-speed wireless communication networks. With the development of 5G / 6G communication in the future, the data transmission capacity of big data, artificial intelligence, and the Internet of Things will increase rapidly, and the average annual growth rate of global network capacity will The growth rate of the transmission capacity of the optical communication network has been greatly exceeded, and a capacity crisis has gradually emerged. Therefore, it is imminent to increase the transmission capacity of the existing optical fiber communication network. From the point of view of the physic...

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Problems solved by technology

[0006] The embodiment of the present application provides an optical fiber bundle sleeve and its preparation method, and a preparation method of a multi-core optical fiber coupler, so as to solve the problems of large coupling loss and uneven coupling between fiber cores in the related art

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