Method and device for directly coupling hollow-core photonic band gap optical fiber ring and integrated optical chip based on composite light guide mechanism

Abstract

The invention provides a method and a device for directly coupling a hollow-core photonic band gap optical fiber ring and an integrated optical chip based on a composite light guide mechanism, and belongs to the technical field of optical fiber device manufacturing. The method and the device aim at the problem of coupling of the hollow-core photonic band gap optical fiber ring which restricts theperformance of a hollow-core photonic band gap optical fiber gyroscope. The device comprises the hollow-core photonic band gap optical fiber ring with the composite light guide mechanism, a clamp andthe integrated optical chip. The method comprises the following steps of: 1, acquiring a flat end face of the hollow-core photonic band gap optical fiber ring; 2, injecting high-refractive-index optical cement and low-refractive-index optical cement into a fiber core large air hole and a cladding small air hole of the end face correspondingly; and 3, directly coupling the hollow-core photonic bandgap optical fiber ring with the composite light guide mechanism and the integrated optical chip. According to the method and the device, welding is not required, the influence of welding points on the reciprocity of an optical path is eliminated, and the low-loss, low-back reflection and high-reliability direct coupling of the hollow-core photonic band gap optical fiber ring and the integrated optical chip is realized by selectively filling proper high-refractive-index optical cement and low-refractive-index optical cement.

Description

technical field [0001] The invention belongs to the technical field of optical fiber device manufacturing, and in particular relates to a direct coupling method and device for a hollow-core photonic bandgap optical fiber ring and an integrated optical chip based on a composite light guiding mechanism. Background technique [0002] The hollow-core photonic bandgap fiber is based on the photonic bandgap effect to guide light. Its cladding is a periodic arrangement of glass tubes, forming a two-dimensional photonic crystal with a periodic distribution of high and low refractive indices, generating a photonic bandgap, and the frequency is within the photonic bandgap. Light cannot be transmitted in it, so it cannot be transmitted in the cladding. The large air hole in the fiber core causes defects in the two-dimensional photonic crystal, and the photonic band gap produces a defect state with an extremely narrow frequency. The light energy of this specific frequency is transmitted...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the large loss and strong back reflection of the current hollow-core photonic bandgap optical fiber ring and the integrated optical chip pigtail fusion method, and the small non-reciprocal phase shift generated by the fusion point will destroy the reciprocity and symmetry of the optical path, which is harmful to the gyroscope. The accuracy has an important impact, which seriously hinders the development of the hollow-core photonic bandgap fiber optic gyroscope. A method and device for direct coupling between the hollow-core photonic bandgap fiber ring and the integrated optical chip based on the composite light guiding mechanism are proposed.

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