Large-core-diameter polarization maintaining optical fiber countershaft welding device and welding method thereof

Abstract

The invention discloses a large-core-diameter polarization maintaining optical fiber countershaft welding device and a welding method thereof. The welding device is additionally provided with a high-efficiency linearly polarized light injection system, an output light collimation filtering system, an optical power and extinction ratio detection system and a data collection processing display system on the basis of a conventional large-core-diameter polarization maintaining optical fiber welding system. The welding method comprises the following steps of firstly, measuring an optical power value and an extinction ratio of the passive large-core-diameter polarization maintaining optical fiber to be welded; measuring an optical power value and an extinction ratio after the active large-core-diameter polarization maintaining optical fiber and the passive large-core-diameter polarization maintaining optical fiber are welded; through comparative analysis of the two groups of data, the polarization axis of the active large-core-diameter polarization maintaining optical fiber being continuously adjusted to be matched with the polarization axis of the passive large-core-diameter polarization maintaining optical fiber, and when comparison of the two groups of data reaches the optimal result, countershaft welding of the two large-core-diameter polarization maintaining optical fibers withdifferent appearance structures and inconsistent internal stress sources being completed. The welding device is advantaged in that the optical fiber is accurate in alignment, and the welded large-core-diameter polarization maintaining optical fiber is high in optical power and extinction ratio and good in communication quality.

Description

technical field [0001] The invention relates to an optical fiber fusion splicing device and a fusion splicing method, in particular to an axial fusion splicing device and a fusion splicing method of a polarization maintaining optical fiber with a large core diameter, belonging to the technical field of manufacture and application of optical fiber fusion splicing devices. Background technique [0002] Optical fiber communication has a large transmission volume and good confidentiality, and has become the most important wired communication method today. [0003] One of the foundations of fiber optic communications is fiber optics. [0004] Since the light wave has two orthogonal polarization states during the transmission of the single-mode fiber, the light waves of these two polarization states are affected by the ellipticity, refractive index distribution and stress asymmetry of the single-mode fiber during the propagation process. Influence, there are differences in the pr...

AI Technical Summary

Problems solved by technology

[0019] However, due to historical and technical reasons, two or more different polarization-maintaining fibers with different external structures and internal stress sources have been laid in many places in reality. For fusion splicing of non-identical polarization-maintaining fibers, The technical solutions given in the prior art often have unsatisfactory fusion splicing effects, and these non-identical polarization-maintaining optical fibers with different shapes and structures and inconsistent internal stress sources often need to be fused due to various reasons, and the existing technology is currently not Can not give a relatively complete welding device and welding method

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