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Intensity modulation direct detection system and method based on carrier support

An intensity modulation and detection system technology, applied in electromagnetic wave transmission systems, transmission systems, electromagnetic receivers, etc., can solve problems such as increasing implementation costs, and achieve the effect of reducing implementation costs and ensuring transmission performance.

Active Publication Date: 2020-08-25
WUHAN POST & TELECOMM RES INST CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the traditional direct detection technology based on the carrier support method usually modulates the signal as a complex signal, and because there is a frequency difference and a phase difference between the carrier and the signal light source, a narrow linewidth laser needs to be used for signal recovery, which increases its implementation cost

Method used

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  • Intensity modulation direct detection system and method based on carrier support
  • Intensity modulation direct detection system and method based on carrier support

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Embodiment Construction

[0057] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of them.

[0058] In this application, when it is described that a specific component is located between a first component and a second component, there may or may not be an intermediate component between the specific component and the first component or the second component; When a specific component is connected to other components, the specific component may be directly connected to other components without an intervening component, or may not be directly connected to other components but has an intervening component.

[0059] see figure 1 as shown, figure 1 It is a structural block diagram of an intensity modulation direct detection system supported by a carrier, which inc...

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Abstract

The invention discloses an intensity modulation direct detection system and method based on carrier support and relates to the field of direct detection optical communication. The system comprises anoptical signal sending device which is used for sending an intensity modulation optical signal based on the carrier support; and an optical signal receiving device which is used for converting the intensity modulation optical signal into a digital signal r(n), converting the digital signal r(n) into a signal r_pnc(n) without a phase noise, and then demodulating the signal without the phase noise into an original intensity signal. According to the intensity modulation direct detection system based on the carrier support, realization cost can be reduced.

Description

technical field [0001] The invention relates to the field of direct detection optical communication, in particular to an intensity modulation direct detection system and method based on carrier support. Background technique [0002] With the sharp increase in the mutual demand for information, the communication capacity and distance requirements between the metropolitan area network and the data center are further increased, and the traditional low-cost optical transmission of direct regulation and detection cannot meet the communication requirements. Although the traditional coherent detection technology can meet its capacity and distance requirements, however, the large number of users in the metropolitan area network cannot bear the high cost of coherent optical transmission. Therefore, the direct detection technology based on the carrier support method has been extensively studied in recent years. However, the traditional direct detection technology based on the carrier...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/079H04B10/50H04B10/54H04B10/60
CPCH04B10/0799H04B10/503H04B10/54H04B10/60
Inventor 黎偲杨超李响余少华
Owner WUHAN POST & TELECOMM RES INST CO LTD
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