Four-core lens optical fiber for silicon optical chip and wedge-shaped lens processing method thereof

Abstract

The invention provides a four-core lens optical fiber for a silicon optical chip and a wedge-shaped lens processing method thereof. The four-core lens optical fiber comprises a cladding and four optical fiber cores arranged side by side in the cladding, the head of each optical fiber core is provided with a wedge-shaped lens, the upper tangent plane of each wedge-shaped lens is located on the same plane, the upper tangent plane and the lower tangent plane of the wedge-shaped lens are symmetrically arranged up and down along the plane where the center lines of the four optical fiber cores are located. According to the invention, the size occupation of the optical fibers is greatly reduced, the problem that the optical fibers can be arranged according to the period only when the optical fiber V-groove substrate is used for fixation is solved, and after the optical fiber V-groove substrate is removed, the space occupation of an optical channel is greatly reduced; on the basis of the four-core optical fiber, a wedge-shaped lens is processed at the head part of each optical fiber core, and a vertical mode field is compressed, so that the mode field is further reduced, and the coupling efficiency with a silicon optical chip can be effectively improved.

Description

technical field [0001] The invention belongs to the technical field of optical communication, and in particular relates to a four-core lens optical fiber used for a silicon optical chip and a wedge lens processing method thereof. Background technique [0002] With the development and maturity of semiconductor technology, the concept of silicon photonics has also been vigorously developed in recent years. [0003] With the realization of silicon photonics technology, the integration level of optical communication systems has been further improved; the volume of devices has been significantly reduced, and the volume of corresponding optical and electrical interfaces must also be reduced accordingly. The existing optical interface is limited by a series of problems such as the volume of the optical fiber and the volume of the FA substrate, and it is difficult to reduce the volume, which affects the area utilization of the optical chip. Another issue is optical coupling. Fiber ...

AI Technical Summary

Problems solved by technology

Due to the complex design and manufacturing process of the original lens fiber FA (fiber array), it cannot meet the requirements of mass production and low-cost production. Despite its outstanding performance, it is still in the laboratory application stage

However, when using low-cost common FA, the coupling efficiency is low, or the design of the input and output interface of the optical chip is complicated, which makes the implementation more difficult.

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