Design method of holographic grating optical waveguide plane concentrating system for lifi communication

Abstract

The invention discloses a design method of a holographic grating optical waveguide planar light concentrating system for LiFi communication, which uses a holographic grating to condense and deflect incident light, and uses an optical waveguide to perform optical path folding on the holographic grating diffracted light; the steps of the method include: S1 Select different integration methods between holographic grating and visible light detector according to the requirements of planar light concentrating system; S2 Design the initial system of holographic grating visible light converging and deflecting; S3 Design the holographic grating optical waveguide concentrating system; S4 Solve the holographic grating through ray tracing The propagation vector of the outgoing light and the period constant of the grating; S5 calculates the diffraction efficiency of the holographic grating; S6 records and tests the holographic grating. The invention replaces the traditional refraction / reflection concentrating function with a low-cost holographic grating, and at the same time deflects the incident light to realize coupling with the optical waveguide; realizes the ultra-thin design of the visible light communication concentrating system by repeatedly folding the optical path through the optical waveguide; and Improve the use efficiency of detectors.

Description

technical field [0001] The invention belongs to the technical field of optical system light concentrating, and in particular relates to a design method of a holographic grating optical waveguide planar light concentrating system oriented to LiFi communication. Background technique [0002] Visible light communication (LiFi) is a full-network two-way wireless solution based on visible light. It has been identified as an important part of the future 6G. It is estimated that the LiFi market will reach 8 billion US dollars by 2030. Visible light communication can not only provide safe high-speed connections for application scenarios such as indoor Internet access, vehicles and underwater communications, but also because the technology uses lighting infrastructure to provide wireless connections, it can take into account the advantages of low energy consumption and low cost at the same time. However, the capacity of VLC systems is susceptible to link congestion and random recepti...

AI Technical Summary

Problems solved by technology

These two types of detection and concentrating systems are usually large in size, and it is difficult to form a planar integrated design with the chip; and with the increase of the converging area, the three-dimensional size of the concentrating system will also increase rapidly

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