Optical path system for silicon optical chip

Abstract

The invention relates to an optical path system for a silicon optical chip, and the system comprises a laser which provides two paths of incident light for the silicon optical chip; and the lens is arranged between the silicon optical chip and the laser, and the two paths of incident light emitted by the laser are condensed by the same lens and then respectively enter the two coupling incident light ports of the silicon optical chip. A light path system in which two paths of incident light share one lens is adopted, the two paths of incident light are symmetrically arranged on the two sides of an axis in a deviated mode with the center position of the lens and the center positions of the two coupling light inlet light ports as the axis, and after being refracted by the lens, the two paths of incident light can enter the two different coupling light inlet light ports on the silicon optical chip respectively. Compared with the prior art that two lenses need to be arranged to introduce two laser beams respectively, the light path system reduces the space occupied by the light path system, reduces the number of components, and improves the return loss performance due to the fact that the incident light is refracted by the lenses and then obliquely enters the coupling light inlet.

Description

technical field [0001] The present invention relates to the technical field of optical communication, in particular to an optical path system for a silicon optical chip. Background technique [0002] Silicon photonic chip is a photonic integrated circuit made of silicon photonic materials and devices through a special process, mainly composed of modulators, detectors, passive waveguide devices, etc. Silicon photonics chips have the characteristics of high integration, low cost, and higher transmission bandwidth. Because silicon photonics chips use silicon as the substrate for integrated chips, they can integrate more optical devices; in optical modules, the cost of traditional optical chips is very high. High, the low cost of silicon optical chips has become a huge advantage; silicon waveguides have a strong binding effect on light due to the high refractive index contrast between the core layer and the cladding layer, so silicon-based optical waveguide devices are small in ...

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the problem that the optical path system of the traditional free space coupling scheme in the prior art cannot meet the incident requirements of two coupling optical ports with small spacing on the silicon optical chip, and provide a The optical path system with two incident lights sharing one lens reduces the space occupied by the optical path system, reduces the number of components, simplifies the process steps, and improves the return loss performance

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