Optical fiber coupler

Abstract

The invention discloses an optical fiber coupler, which comprises a substrate, a coupling optical fiber, a glass tube and a hard protecting pipe; the coupling fiber is provided with a coupling sectionformed by fused biconical taper, an input section located at one end of the coupling section and an output section at the other end of the coupling section; the coupling section extends and fixes onthe substrate along the length direction of the substrate; the glass pipe is sleeved at outside of the substrate and the coupling section, both ends of the glass tube are sealed by a first rubber body; the hard protecting pipe is sleeved at outside of the glass tube, both ends of the hard protecting pipe are sealed by a second rubber body; a moisture absorbing material is arranged between the second rubber body and the first rubber body; the input end is orderly crossed out from one end of each of the glass tube and the hard protecting tube; the output section is orderly crossed out from the glass tube and the other end of the hard protecting tube. The optical fiber coupler provided by the embodiment is high in reliability and stability, and can pass through the high-temperature and high-humidity test.

Description

technical field [0001] The invention relates to the technical field of optical communication passive devices, in particular to an optical fiber coupler. Background technique [0002] The full name of fiber optic coupler is Fused Biconical Taper Coupler, which is one of the most important optical passive devices (Optical Passive Devices) and the core component in the field of optical fiber communication. Fiber optic couplers are widely used, coping with complex and changeable application environments, improving reliability and stability has become a key research project for many manufacturers. [0003] The optical fiber coupler packaging process in the related art is generally fixed on the quartz substrate with epoxy glue after the optical fiber is fused and tapered, and then the quartz substrate is fixed in the glass tube, and the two ends of the glass tube are sealed with epoxy glue, and finally the The glass tube is fixed in the stainless steel tube with silica gel, and t...

AI Technical Summary

Problems solved by technology

Its main defect is that the epoxy glue at both ends of the glass tube has poor sealing performance. During the high-temperature and high-humidity test, water vapor enters the glass tube, which affects the stability of the glue that fixes the optical fiber, thereby affecting the performance of the fiber coupler.

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