A passive visible light to infrared light converter

Abstract

The invention belongs to the technical field of converters, and discloses a passive converter from visible light to infrared light. The converter includes a photovoltaic detector, a circuit board and a silicon-based photonic chip. The photovoltaic detector is used to absorb visible light and convert the absorbed The photons of visible light are converted into voltage signal output; the circuit board is used to connect the photovoltaic detector and the silicon-based photonic chip, and transmit the voltage signal to the silicon-based photonic chip; the silicon-based photonic chip includes an electro-optical modulator and a coupling grating, and the infrared light is coupled The grating entrance enters the electro-optic modulator. The electro-optic modulator includes electrodes, micro-ring waveguides and coupling waveguides. The electrodes are connected to the circuit board. The coupling waveguides are used to transmit infrared light into the micro-ring waveguides. The micro-ring waveguides are driven by voltage signals. Next, the infrared light is modulated so that the infrared light carries the information of the visible light, so as to realize the passive conversion of the infrared light. The invention realizes passive conversion with high efficiency, simple structure and low production cost.

Description

technical field [0001] The invention belongs to the technical field of converters, and more specifically relates to a converter from passive visible light to infrared light. Background technique [0002] Visible light communication expands the spectrum range of wireless communication, provides a new high-speed wireless communication method with energy saving and confidentiality, and has achieved rapid development. The mature optical fiber communication system in the infrared frequency band carries the vast majority of data communication traffic in the world. It is of great significance to realize the direct connection between visible light communication and optical fiber communication by converting the visible light information to the infrared light frequency band. On the other hand, the monitoring of natural light conditions can provide data support for agricultural planting, solar resource assessment, etc. It is necessary to detect light information in remote unmanned are...

AI Technical Summary

Problems solved by technology

[0003] At present, the traditional visible light to infrared light conversion scheme is generally a parametric process using optical nonlinear effects, which has problems such as low conversion efficiency, high energy consumption, the converted light must be laser light, and strong pump light provided by active equipment is required.

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