Dual-mode underwater wireless optical communication method

A wireless optical communication and two-party technology, applied in the field of dual-mode underwater wireless optical communication, can solve the problems of low modulation rate and difficult alignment

Inactive Publication Date: 2019-02-19
中国船舶重工集团公司第七0五研究所
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Problems solved by technology

[0003] Underwater blue-green light communication light sources are mainly divided into LED and LD. LED has high emission power, wide beam angle, and is easy to align, but the modulation rate is low; LD beam collimation is good, modulation speed is high, but it is difficult to align

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  • Dual-mode underwater wireless optical communication method

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Embodiment Construction

[0013] Embodiments of the present invention are described in detail below, and the embodiments are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0014] Such as figure 1 As shown, Party A and Party B use blue-green light for underwater wireless communication. Party A installs an LD high-speed receiver in the center of the lens of the wireless optical communication device, and arranges LED arrays evenly around the periphery; Party B installs a four-quadrant photodetector in the center of the lens of the wireless optical communication device. An LD light source is installed near the detector. Party A’s communication light source uses LED (light emitting diode), and Party B’s communication light source uses LD (laser diode). After the communication starts, Party A uses the modulated LED to irradiate Party B. Since the beam divergence angle of the LED is very large, it is easy to irradiate the lens of Part...

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Abstract

The invention provides a dual-mode underwater wireless optical communication method. An LD high-speed receiver is arranged at the center of a lens of a first party wireless optical communication device, and an LED array is uniformly arranged at the periphery of the lens; a four-quadrant photoelectric detector is arranged at the center of the lens of a second party wireless optical communication device, and an LD light source is arranged adjacent to the four-quadrant photoelectric detector. When the first party wireless optical communication device and the second party wireless optical communication device are in communication, the first party irradiates the second party by using an LED light source modulated with a low-speed communication signal, after receiving the first party LED light source signal, the four-quadrant photoelectric detector on the second party lens demodulates a low-speed communication signal therein to realize the low-speed communication to the second party from thefirst party, and the LED light source location of the first party is detected at the same time, and a servo device is controlled to turn the second party lens to the first party lens to perform the alignment; after the second party lens is aligned with the first party lens, the second party LD light source is irradiated to the center of the first party lens to realize the high-speed communicationto the first party from the second party. By sufficiently utilizing the advantages of the LED and the LD light sources, the alignment is easy, the use is convenient, and the high-speed communicationcan be realized.

Description

technical field [0001] The invention relates to the technical field of underwater wireless communication, in particular to a dual-mode underwater wireless optical communication method, which uses LED (light emitting diode) for alignment and low-speed communication, and then uses LD (laser diode) for high-speed communication to form an infinite Symmetrical dual-mode communication. 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 method. It has a long transmission dista...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B13/02
CPCH04B13/02
Inventor 高卓朱云周孙铁绳李碧丽姬雪峰胡鹏胡旭娟
Owner 中国船舶重工集团公司第七0五研究所
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