Low-cost infrared band underwater wireless optical communication device

Abstract

The invention provides a low-cost infrared band underwater wireless optical communication device which is formed by a watertight casing, a light emitting and receiving lens and a photoelectric conversion module. The light emitting and receiving lens has a focusing lens and a fiber collimator inside, the optical fiber collimator is used to perform beam expansion when light is emitted, and the focusing lens is used to perform focusing when the light is received. The mutual conversion of an electrical signal and an optical signal can be achieved by the photoelectric conversion module which is formed by a standard infrared SFP optical module and a Gigabit photoelectric switch. The photoelectric conversion module is installed in the watertight casing, the standard infrared SFP optical module isflexibly connected to the optical transmitting and receiving lens through an optical fiber, and the Gigabit optical switch is connected to an external system through a Gigabit Ethernet interface. According to the low-cost infrared band underwater wireless optical communication device, the underwater close distance point-to-point high-speed wireless communication is achieved by using an infrared band spatial light signal, and the device has the advantages of small volume, low cost and high speed.

Description

technical field [0001] The invention relates to the technical field of underwater wireless communication, in particular to a low-cost infrared band underwater wireless optical communication device, which uses infrared band spatial light signals to realize underwater short-distance point-to-point high-speed wireless communication, and has the advantages of small size, low cost, and high speed. Outstanding advantages. Background technique [0002] At present, underwater wireless communication mainly includes: low-frequency electromagnetic wave communication, underwater acoustic communication and wireless optical communication. Low-frequency electromagnetic wave communication uses extremely low-frequency radio waves for underwater transmission of information. Its communication rate is extremely low, the communication distance is short, and the transceiver equipment is huge. Underwater acoustic communication is currently a relatively mature underwater wireless communication met...

AI Technical Summary

Problems solved by technology

[0003] In order to increase the transmission distance of underwater optical signals, the blue-green light band with lower seawater loss is generally selected for underwater wireless optical communication. The technical level of optical passive devices is low, and their performance, cost and reliability cannot be compared with infrared band devices maturely used in optical fiber communication.

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