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Optical communication system and method

An optical communication system and optical signal technology, applied in the field of optical communication, can solve the problems of weakening optical signals, difficulty in long-distance transmission of optical signals, and the inability of optical receiving devices to receive weak optical signals, and achieve the effect of expanding the receiving range

Inactive Publication Date: 2016-10-12
THE PLA INFORMATION ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the optical signal will weaken with the increase of the transmission distance, and the optical receiving device in the optical communication system cannot receive the weak optical signal, which makes the long-distance transmission of the optical signal in air or water more difficult

Method used

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  • Optical communication system and method
  • Optical communication system and method
  • Optical communication system and method

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0034] See figure 1 , which shows a schematic diagram of a logical structure of the optical communication system provided by the present application, the optical communication system includes: a modulation device 11, an optical signal source 12, a single-photon type PMT (photomultiplier tube, photomultiplier tube) 13 and a demodulation device 14.

[0035] The modulation device 11 is configured to convert the original digital signal into an analog electrical signal, and send the analog electrical signal to the optical signal source 12 .

[0036] The optical signal source 12 is configured to convert the analog electrical signal into an optical signal and emit the optical signal.

[0037] In this embodiment, when the data information represented by the original digital signal is 1, the analog electrical signal is converted into an optical signal containing a first preset number of photons; when the data information represented by the original digital signal is 0, the The analog...

Embodiment 2

[0059] Corresponding to Embodiment 1, this embodiment provides an optical communication method, please refer to image 3 , can include the following steps:

[0060] Step S31: the modulation device converts the original digital signal into an analog electrical signal, and sends the analog electrical signal to an optical signal source.

[0061] Step S32: the optical signal source converts the analog electrical signal into an optical signal, and emits the optical signal.

[0062] Step S33: The single-photon PMT receives the optical signal, converts each photon in the received optical signal into an electrical pulse signal, counts the converted electrical pulse signal, obtains the number of electrical pulses, and calculates the number of electrical pulses sent to the demodulator.

[0063] Step S34: The demodulation device compares the number of electrical pulses with a preset decision threshold.

[0064] When the comparison result is that the number of electrical pulses is grea...

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Abstract

The invention provides an optical communication system and method. The optical communication system comprises a modulation device, an optical signal source, a single-photon PMT, and a demodulation device, wherein the modulation device is used for converting an original digital signal into an analog electrical signal, and sending the analog electrical signal to the optical signal source; the optical signal source is used for converting the analog electrical signal into an optical signal, and transmitting the optical signal; the single-photon PMT is used for receiving the optical signal, respectively converting photons in the received optical signal into electrical pulse signals, counting the electrical pulse signals which are obtained through conversion, obtaining the number of electrical pulses, and sending the number of the electrical pulses to the demodulation device; the demodulation device is used for outputting a first digital signal when a comparison result is that the number of the electrical pulses is larger than a preset judgment threshold, and outputting a second digital signal when the comparison result is that the number of the electrical pulses is smaller than the preset judgment threshold. The system and method provided by the invention have the advantage that the optical signal can travel for a longer distance in air, water, or transmission media of wireless channels other than air and water.

Description

technical field [0001] The present application relates to the field of optical communication, in particular to an optical communication system and method. Background technique [0002] At present, optical communication (such as visible light communication and laser communication) that directly transmits optical signals in air or water has attracted extensive attention and research because it is free from electromagnetic wave interference and has good communication quality. [0003] However, the optical signal will weaken with the increase of the transmission distance, and the optical receiving device in the optical communication system cannot receive the weak optical signal, which makes it difficult to transmit the optical signal over a long distance in air or water. Contents of the invention [0004] In order to solve the above technical problems, the embodiment of the present application provides an optical communication system and method to achieve the purpose of transm...

Claims

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Application Information

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IPC IPC(8): H04B10/69H04B10/54
CPCH04B10/695H04B10/541
Inventor 朱义君王超于宏毅邬江兴张剑仵国锋汪涛田忠骏李崇任嘉伟
Owner THE PLA INFORMATION ENG UNIV