A method and device for coupling a pluggable hollow-core photonic bandgap fiber with a traditional fiber

Abstract

The invention provides a pluggable hollow-core photonic band gap fiber and traditional fiber coupling method and device, and belongs to the technical field of fiber device manufacturing. According tothe coupling device, a gradient refractive index lens is arranged between a Y waveguide traditional tail fiber and a hollow-core photonic band gap optical fiber through a coupling connector; the coupling surface of the gradient refractive index lens is beveled, the beveled end surface of a traditional optical fiber is in parallel butt joint with the coupling surface of the gradient refractive index lens, and a hollow-core photonic band gap optical fiber is in butt joint with the other coupling surface of the gradient refractive index lens at the determined optimal coupling angle. According tothe method, the optimal coupling angle and the optimal coupling interval corresponding to the maximum coupling efficiency are obtained through calculation by establishing a simulation coupling model,and the coupling of the hollow-core photonic band gap optical fiber and the traditional optical fiber is realized by utilizing the coupling device. According to the invention, pluggable low-loss and low-back-reflection coupling of the hollow-core photonic band gap optical fiber and a traditional optical fiber is realized, the coupling process is simple to operate, and the coupling performance is reliable.

Description

technical field [0001] The invention belongs to the technical field of optical fiber device manufacturing, and in particular relates to a coupling method and device for a pluggable hollow-core photonic bandgap optical fiber and a traditional optical fiber. Background technique [0002] Hollow-core photonic bandgap fiber is a new type of microstructured fiber. It guides light based on the photonic bandgap effect. The cladding is a two-dimensional photonic crystal arranged periodically to generate a photonic bandgap. The large air holes in the core destroy the period of the cladding. Sexual structure, resulting in defect states, thereby limiting the transmission of light in the core. Compared with traditional optical fibers, hollow-core photonic bandgap fiber has good environmental adaptability, and it can improve the performance of gyroscopes when used in fiber optic gyroscopes. Experiments have proved that hollow-core photonic bandgap fiber optic gyroscopes have obvious adva...

AI Technical Summary

Problems solved by technology

Compared with flat-cut welding, oblique-cut welding can reduce the back reflection to a certain extent, but the welding loss will be greatly increased, which will increase the gyro noise

In addition, due to the porous structure of the end face of the hollow-core photonic bandgap fiber, the strength of the fusion point is extremely low, resulting in a decrease in the reliability of the gyro

In short, the current method of fusion splicing the hollow-core photonic bandgap fiber and the Y-waveguide pigtail has the disadvantages of strong back reflection, large loss, and low strength, which seriously limit the development of the hollow-core photonic bandgap fiber optic gyroscope.

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