Hybrid fiber array and photoelectric device based on numerical aperture conversion

Abstract

The invention relates to a hybrid fiber array and a photoelectric device based on numerical aperture conversion. The hybrid fiber array comprises a substrate, a cover plate and a hybrid fiber with different numerical aperture at two ends; a V groove for placing the hybrid fiber is formed on the upper surface of the substrate; one end of the V groove stretches to the side wall of one end of the substrate; the cover plate is placed on the substrate and presses the hybrid fiber in the V groove; one end with the lesser numerical aperture of the hybrid fiber is coupled with a laser; and the other end with the larger numerical aperture of the hybrid fiber is connected with an optical link. The mode field is converted by taper welding the fiber cores with different numerical apertures, so as to form the hybrid fiber array; one end of the hybrid fiber array is coupled with the laser, and the other end is connected with the fiber link; the coupling efficiency is significantly improved; the structure is simple; the miniaturization and the scale are easy to realize; the hybrid fiber array is convenient to be coupled with the outer laser and the fiber link; and, the hybrid fiber array is simple and reliable, and is very suitable for popularizing and using in large area.

Description

technical field [0001] The invention relates to the field of laser technology, in particular to a hybrid optical fiber array and an optoelectronic device based on numerical aperture conversion. Background technique [0002] In optical fiber communication technology, since the signal propagates in the form of light in the optical fiber, coupling technology is essential to couple the optical signal emitted by the laser into the optical fiber, which is the technical basis of optoelectronic transceiver devices and modules. [0003] There are two main traditional coupling methods, one is the direct coupling of optical fiber and laser such as figure 1 , and the second is to use lens coupling such as figure 2 . exist figure 1 In the direct coupling mode of the fiber laser, since the numerical aperture NA value of the standard single-mode fiber is in the range of 0.1-0.12, it indicates that the light-receiving ability of the fiber is in the conical range of 14°, and the divergen...

AI Technical Summary

Problems solved by technology

Although lens coupling can significantly improve the coupling efficiency, especially the aspheric lens, the introduction of the lens will lead to disadvantages such as increased cost, complex optical path, and larger device volume.

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