Manufacturing equipment and method of optical fiber coupler

Abstract

The invention provides manufacturing equipment and method of an optical fiber coupler. The manufacturing equipment specifically comprises a platform (1) and a control system (2), wherein the platform (1) comprises a platform base (9), a stretching assembly (3) arranged on the longitudinal middle part of the platform base (9), a positioning assembly (6) as well as a heating assembly (5), a vertical observation assembly (7) and a horizontal observation assembly (8) which are fixedly arranged on the upper part of the platform base (9); and the control system (2) comprises a motor controller (11) which is used for outputting drive current and respectively controlling a first electric translation stage (31a), a second electric translation stage (31b) and motors on the heating assembly (5), the vertical observation assembly (7) and the horizontal observation assembly (8) to move through drive leads. The invention is used for manufacturing an optical fiber coupler having small volume, large coupling length and small insertion loss.

Description

technical field [0001] The invention relates to the technical field of manufacturing optical passive devices, in particular to a manufacturing device and a manufacturing method of an optical fiber coupler. Background technique [0002] Fiber Coupler, also known as Fiber Splitter, is a component that divides optical signals from one optical fiber to multiple optical fibers. It is not only an important passive optical component in the optical communication network, but also the basis for making other complex components such as all-fiber up and down voice filters. Therefore, it has been widely used in telecommunication networks, cable TV networks, user loop systems, and regional networks. [0003] The traditional manufacturing methods of optical fiber couplers include fusion tapered method and side grinding method. [0004] The fusion tapering method uses a high-temperature flame to heat the two optical fibers that are stripped of the coating and are close together, and at th...

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Problems solved by technology

[0005] However, the optical fiber coupler made by the fusion tapered method has the following disadvantages: 1. Since the optical field needs to overcome the barrier effect of the fiber cladding to achieve the coupling effect, the waist is very thin, and the diameter is usually only 1-2um. 2. The effective coupling area is very short, usually less than 0.5mm, and it is difficult to deal with the effective coupling area; 3. The effective coupling area is usually longitudinally distributed and uneven, thus limiting The range of use of the coupler

[0007] Although the core of the side-polished fiber coupler is undamaged and it can have a long coupling distance, it still has many disadvantages: 1. The glue cannot guarantee the firmness of the fiber and the V-groove, so, between the two When two semiconductor substrates are bonded together, the polished surfaces of the corresponding two optical fibers are difficult to bond together; 2. The radiation loss of surface bonding is much greater than the loss of fusing the two together, thus increasing the insertion of the fiber coupler loss; 3. The existence of the semiconductor substrate makes the side-ground fiber coupler bulky; 4. The existence of the semiconductor substrate also hinders the further use of the coupler, for example, writing a fiber grating on it to make a narrowband Applications such as all-fiber add / drop voice filters

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