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System and method for simplifying dispersion compensation in single-fiber bidirectional DWDM (Discrete Wavelength Division Multiplexing) transmission

A dispersion compensation and single-fiber bidirectional technology, which is applied to the system and field of simplified dispersion compensation in single-fiber bidirectional DWDM transmission, can solve problems such as increased proportion, and achieve the effect of reducing system cost

Pending Publication Date: 2022-07-29
成都紫峰光电有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When transmitting 100G DWDM optical signals, an adjustable dispersion compensation module is required, and the cost of dispersion compensation will increase in the proportion of the system

Method used

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  • System and method for simplifying dispersion compensation in single-fiber bidirectional DWDM (Discrete Wavelength Division Multiplexing) transmission
  • System and method for simplifying dispersion compensation in single-fiber bidirectional DWDM (Discrete Wavelength Division Multiplexing) transmission
  • System and method for simplifying dispersion compensation in single-fiber bidirectional DWDM (Discrete Wavelength Division Multiplexing) transmission

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Embodiment 1

[0069] A system for simplifying dispersion compensation in single-fiber bidirectional DWDM transmission in this embodiment, such as Figure 1-Figure 12 As shown, in this embodiment, a combination of "band filters" is used to convert two signals in different directions in a single fiber bidirectional manner into signals in the same direction, so that one fiber dispersion compensator can be used. Simultaneously compensate the bidirectional optical signal. In the single-fiber bidirectional DWDM transmission system, the C21-C36 channels in the C-band (C-band) DWDM channels defined by the International Telecommunication Union (ITU) are usually called Red-band, and the C45-C60 channels are called Red-band. Blue-band. like image 3 , Figure 4 or Figure 9 As shown, 21-36 represent the red band wavelength, 45-60 represent the blue band wavelength, the filter that separates the red band optical signal and the blue band optical signal is called the R / B Band Filter, Hereinafter ref...

Embodiment 2

[0072] This embodiment is further optimized on the basis of Embodiment 1. The second optical selector module is connected with the second optical fiber amplifier, the second optical fiber amplifier is connected with the second waveband filter, and the third waveband filter is connected with the first optical fiber amplifier , the first optical fiber amplifier is connected with the second optical selector module; the optical signal for the red wavelength band and the optical signal for the blue wavelength band are transmitted along different directions in the single fiber.

[0073] The other parts of this embodiment are the same as those of Embodiment 1, and thus are not repeated here.

Embodiment 3

[0075] This embodiment is further optimized on the basis of the above-mentioned embodiment 1 or 2. The dispersion compensator is connected with a third fiber amplifier, and the third amplifier is connected with a third band filter; Optical signals and optical signals in the blue band. like Figure 9 As shown, when the design parameters of the optical fiber link have sufficient margin, and one optical fiber amplifier EDFA can meet the amplification requirements of the optical signal in the red band and the optical signal in the blue band at the same time, the system architecture of the present invention can be extended. to as Figure 9 As shown, using a single fiber amplifier EDFA to simultaneously amplify bidirectional optical signals reduces the requirement for fiber amplifiers from two to one, thereby further reducing the system cost. Figure 9 and Figure 12 The third fiber amplifier is located between the dispersion compensator and the third-band filter, which is a comm...

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Abstract

The invention relates to the technical field of optical fiber communication, and discloses a system for simplifying dispersion compensation in single-fiber bidirectional DWDM (Discrete Wavelength Division Multiplexing) transmission, which realizes bidirectional optical signal dispersion compensation by utilizing a single optical fiber dispersion compensator and comprises a dispersion compensator, a second band filter, a third band filter, a first optical selector module and a second optical selector module, the second wave band filter is connected with the third wave band filter through the dispersion compensator, the dispersion compensator is connected with the first optical selector module through the second wave band filter and the third wave band filter, and the dispersion compensator is connected with the second optical selector module through the second wave band filter and the third wave band filter. The first optical selector module comprises a first band filter and a first DWDM combiner / demultiplexer, and the second optical selector module comprises a fourth band filter and a second DWDM combiner / demultiplexer. The invention also discloses a method for simplifying dispersion compensation in single-fiber bidirectional DWDM transmission, which can realize dispersion compensation for optical signals in two directions by using a single dispersion compensator.

Description

technical field [0001] The invention relates to the technical field of optical fiber communication, in particular to a system and method for simplifying dispersion compensation in single-fiber bidirectional DWDM transmission. A single fiber dispersion compensator is used to realize dispersion compensation of bidirectional optical signals. The optical signals in different directions are converted into optical signals in the same direction, so that a single optical fiber dispersion compensator can be used to compensate the bidirectional optical signals at the same time. Background technique [0002] DWDM: Dense Wavelength Division Multiplexing optical fiber communication technology can combine optical signals of many wavelengths and transmit them with one optical fiber, which greatly improves the utilization rate of optical fiber resources. At present, the zero dispersion point of G.652 fiber used in most optical fiber lines is located near the wavelength of 1310nm. For the 15...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/2513H04B10/25H04B10/297H04J14/02
CPCH04B10/25133H04B10/2589H04B10/2971H04J14/0202
Inventor 丁明丘林霖
Owner 成都紫峰光电有限公司
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