Special optical fiber preform sealing device

Abstract

The invention discloses a special optical fiber preform rod sealing device which comprises an upper outer sleeve, an inner sleeve and a lower outer sleeve which are connected in sequence, and is characterized in that the inner sleeve is of a reducing structure, the upper end of the inner sleeve is sleeved outside a preform rod core rod extension rod in a sealing manner, the lower end of the inner sleeve is sleeved outside a quartz tube in a sealing manner, and the preform rod core rod extension rod is arranged in the quartz tube; and a cavity is formed between the inner wall of the inner sleeve and the preform core rod extension rod and is communicated with an air inlet formed in the cavity. For a small-diameter preform for drawing a special optical fiber, the structure is convenient to process, simple and practical, has low requirement on the size of the special optical fiber preform as a sealing object, has certain installation allowance, and is more convenient to install and use. The sealed special optical fiber preform is used for drawing of a special drawing tower and can be used for production of various special optical fibers.

Description

technical field [0001] The invention relates to the technical field of optical fiber and cable, in particular to a special optical fiber preform sealing device. Background technique [0002] In recent years, with the rapid development of broadband China, digitization, smart cities, Internet of Things, etc., the business volume of the network is rapidly expanding at an exponential rate. Correspondingly, the market of communication optical fiber has also been greatly expanded. At the same time, the application of special optical fiber in the fields of high-precision navigation, sensing, medical treatment, laser, petroleum, communication, transportation and military is also developing by leaps and bounds. In a narrow sense, special optical fibers refer to optical fibers made of special materials, used at specific wavelengths, and with specific functions; in a broad sense, special optical fibers, special communication optical fibers and cables, and even components are all speci...

AI Technical Summary

Problems solved by technology

The advantage is that the process route is short, and the production process control is relatively simple. The only disadvantage is that the outer casing needs to be purchased, and the cost is high.

However, for the production of special optical fiber preforms, the output is already very low, and the product types are complex. Equipped with cladding deposition manufacturing equipment, it is bound to increase R&D and enterprise operating costs

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