Light transceiving device for visible light optical fiber transmission

Abstract

The invention discloses a light transceiving device for visible light optical fiber transmission. The light transceiving device comprises a light transmitter and a light receiver, the light transmitter comprises a resonant cavity light-emitting diode, a light transmitter drive circuit, a hemispheric lens with a periodic structure, a planar optical waveguide coupler and an optical isolator, the light receiver comprises an optical receiving module and a limiting amplifier, the hemispheric lens with the periodic structure comprises a hemispheric lens body, and round air holes in array distribution are arranged on the hemispheric lens body. The operating wavelength of the visible light optical fiber transmission is 650nm, and a single-mode quartz optical fiber serves as a transmission medium. Incident fiber optical power coupling effect can be more effectively improved by the aid of the hemispheric lens with the periodic structure. When visible light is transmitted in the quartz optical fiber, few transmission modes are excited for transmission, and accordingly multimode dispersion and interference can be suppressed.

Description

technical field [0001] The invention relates to the technical field of optical fiber communication, in particular to an optical transceiver device for visible light optical fiber transmission, including an optical transmitter and an optical receiver. Background technique [0002] With the popularity of high-bandwidth applications such as high-definition video and video conferencing, people have higher and higher requirements for network bandwidth. In the current fiber-to-the-home (FTTH) wiring, quartz single-mode optical fiber is generally used to connect to the corridor or the wiring box on each floor, and in the horizontal direction of the floor, copper cables are generally used for the "last hundred meters" intervention . However, copper cables are gradually being replaced by optical fibers due to their shortcomings such as inability to support high-speed transmission, high cost, and poor anti-electromagnetic interference. [0003] Plastic optical fiber, also known as p...

AI Technical Summary

Problems solved by technology

However, the efficiency of the optical coupling method using ordinary lenses is limited. The visible light signal emitted by the RCLED is lost during the optical coupling process, resulting in a reduction in the optical power at the sending end of the transmission system and reducing the transmittable distance of the optical signal.

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