Welding method for high-strength hollow-core photonic crystal fiber

Abstract

The invention discloses a welding method for a high-strength hollow-core photonic crystal fiber. The method comprises: a welding fire head is discharged and heated, so that end surfaces of a hollow-core photonic crystal fiber and a traditional single-mode fiber are fused; two segments of fibers are pushed in an opposite direction to realize contact and fusion, wherein the center of the welding fire head is located at the fusing point; the power supply of the welding fire head is cut off, the fusing point position is kept to be unchanged, and the welding fire head moves towards the traditional single-mode fiber, so that the center of the welding fire head moves away from the end surface of the hollow-core photonic crystal fiber; and then the welding fire head is electrified and secondary heating reinforcement is carried out on the fusing point. Therefore, the welding strength of the hollow-core fiber and the single-mode fire is improved obviously; and reliability of the hollow-core fiber application process is enhanced.

Description

technical field [0001] The invention relates to a high-strength hollow-core photonic crystal optical fiber welding method, which belongs to the technical field of optical fiber gyroscopes. Background technique [0002] Hollow-core photonic crystal fiber (hereinafter referred to as "hollow-core fiber") is a new type of optical fiber. The inside of the fiber cladding is composed of air holes regularly arranged along the fiber axis, and several air holes are synthesized into a large Air holes, through the band gap effect, confine light to transmit inside the large air holes. The sensitive ring made of this new type of optical fiber instead of the traditional quartz optical fiber is used as the sensitive element of the fiber optic gyroscope, which can effectively suppress the Kerr effect, Shupe effect and Farady effect of the fiber optic gyroscope, and is the future development direction of the fiber optic gyroscope. [0003] In the research process of the hollow-core fiber opt...

AI Technical Summary

Problems solved by technology

In the case of not destroying the structural integrity, the fusion strength of the hollow-core fiber and the single-mode fiber is only a dozen kpsi (about 0.5N force can break the melting point), and the reliability in the application process cannot be guaranteed at all.

However, relying on the traditional splicing method to simply increase the splicing power and time can improve the melting point strength, but the structure of the hollow-core fiber is seriously damaged, and the splicing loss must be doubled or even several times.

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