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High-safety reflecting coherent light communication system transmitting en and system

A technology of coherent optical communication and high security, which is applied to the transmitting end and system field of reflective coherent optical communication system, can solve the problems affecting signal transmission quality, difficult security requirements, and interfere with signal light, etc., so as to improve transmission quality, Reasonable structure and the effect of solving phase noise

Active Publication Date: 2019-10-15
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is: the traditional communication system has the risk of optical fiber stealing information, especially in the application of confidential communication or special fields, it is more difficult to meet the security requirements, noise will interfere with the signal light, and affect the transmission quality of the signal , the present invention provides a highly secure reflective coherent optical communication system transmitter and system that solves the above problems. The reflective coherent optical communication system implemented by such a non-reflective modulator can avoid signal interference and realize High Security Transmission

Method used

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  • High-safety reflecting coherent light communication system transmitting en and system
  • High-safety reflecting coherent light communication system transmitting en and system
  • High-safety reflecting coherent light communication system transmitting en and system

Examples

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Embodiment 1

[0038] Such as figure 1 As shown, a high-security reflective coherent optical communication system transmitter includes a polarization controller 1, a first polarization beam splitter 2, a modulator 3, a Faraday rotator, a polarization maintaining coupler 5a, and a photoelectric converter 6 And the electrical comparator 7, the optical carrier transmitted from the receiving end enters the polarization controller 1 through optical fiber transmission, outputs an optical carrier with a polarization state, and then passes through the first polarization beam splitter 2 to output two orthogonal beams of light; wherein, The first optical carrier is connected to the external feedback interface of the polarization controller 1 through the polarization-maintaining coupler 5a, the photoelectric converter 6 and the electrical comparator 7 in turn; the second optical carrier enters the modulator 3 for phase modulation of the optical carrier. After the modulator 3 changes the phase of the op...

Embodiment 2

[0048] Such as figure 2 As shown, a high-security reflective coherent optical communication system transmitter includes a polarization controller 1, a first polarization beam splitter 2, a modulator 3, a Faraday rotator, a polarization maintaining circulator 5b, and a photoelectric converter 6 And the electrical comparator 7, the optical carrier transmitted from the receiving end enters the polarization controller 1 through optical fiber transmission, outputs an optical carrier with a polarization state, and then passes through the first polarization beam splitter 2 to output two orthogonal beams of light; wherein, The first optical carrier is connected to the external feedback interface of the polarization controller 1 through the polarization maintaining circulator 5b, the photoelectric converter 6 and the electrical comparator 7 in turn; the second optical carrier enters the modulator 3 to perform phase modulation of the optical carrier, using After the modulator 3 changes...

Embodiment 3

[0056] Such as image 3 As shown, the difference between this embodiment and Embodiment 1 and Embodiment 2 is that a high-security reflective coherent optical communication system includes a laser 8, an isolator 9, a four-port coupler 10, a second polarization beam splitter A high-security reflective coherent optical communication system transmitting end 12 in the device 11 and embodiment 1; in this embodiment, the four-port coupler 10 is a 3dB coupler;

[0057] Such as image 3 Shown is the structure diagram of the reflective coherent optical communication system of the present invention. The solid line of the solid arrow is the forward light wave transmission path, the dotted line of the solid arrow is the reverse light wave transmission path, and the solid line of the hollow arrow is the feedback circuit part.

[0058] The laser 8 is arranged at the receiving end, and the laser 8 emits an optical carrier, which is connected to the first port 101 of the four-port coupler 1...

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Abstract

The invention discloses a high-safety reflecting coherent light communication system transmitting end and system. The high-safety reflecting coherent light communication system transmitting end comprises a polarization controller, a first polarization beam splitter, a modulator, a Faraday rotator, a polarization-maintaining coupler or a polarization-maintaining circulator, a photoelectric converter and an electric comparator. The high-safety reflective coherent light communication system comprises a laser, an isolator, a four-port coupler, a second polarization beam splitter and the transmitting end of the high-safety reflective coherent light communication system. Based on the electro-optical modulation technology of the reflective structure, the requirements of signal transmission, sensing, testing and the like of the reflective structure can be met.

Description

technical field [0001] The invention relates to the technical field of optical communication systems, in particular to a high-security reflective coherent optical communication system transmitter and system. Background technique [0002] Optical communication systems are divided into direct detection systems and coherent optical communication systems according to the differences in modulation methods and detection methods. The direct detection system generally adopts direct modulation and direct detection demodulation, the structure is relatively simple, and the cost is low; the coherent optical communication system generally adopts the external modulation method. , or phase information, coherent detection methods are often used in demodulation. The difference between the two detection methods is that direct detection responds to the average optical power and reflects the light field envelope; while coherent detection responds to the frequency or phase of light. Therefore,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/25H04B10/50H04B10/556H04B10/61
CPCH04B10/505H04B10/5561H04B10/614H04B10/6151H04B10/616H04B10/25891
Inventor 陈树强蒋元元金诗文闫淼
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA