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A double-mzi multi-level pam signal all-optical shaper and its design method

A technology of optical shaper and design method, which is applied in the direction of electromagnetic transmitter, optical fiber transmission, electrical components, etc., can solve the problems of difficult shaping technology and optical domain shaping, so as to improve shaping performance, optimize shaping performance, and ensure long-distance The effect of effective transmission

Active Publication Date: 2021-08-31
GUANGXUN SCI & TECH WUHAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with OOK signals, the shaping technology of PAM signals is more difficult. Although there are relatively mature solutions in the electrical domain, it is much more difficult to shape in the optical domain. This requires an all-optical shaper for multi-level PAM signals. guide
At present, an all-optical shaper for multi-level PAM signals is used to reshape and regenerate degraded signals. For example, in the patent document CN201610163853.6, a multi-level optical shaper with a Mach-Zehnder Interferometer (MZI) structure is provided. Level PAM signal all-optical shaper, including linear matching optical amplifier and MZI shaping module, but the shaping performance still needs to be further optimized, and a multi-level PAM signal all-optical shaper with better performance is urgently needed for guidance

Method used

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  • A double-mzi multi-level pam signal all-optical shaper and its design method
  • A double-mzi multi-level pam signal all-optical shaper and its design method
  • A double-mzi multi-level pam signal all-optical shaper and its design method

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Embodiment 1

[0048] An embodiment of the present invention provides a dual-MZI multi-level PAM signal all-optical shaper, such as figure 1 As shown, it includes two parts: a matching dimmable amplifier connected front and rear and a double MZI shaping unit; wherein, the double MZI shaping unit is an MZI structure, and the upper arm of the double MZI shaping unit is provided with an embedded MZI module, and the lower arm An optical fiber is provided; the embedded MZI module is also an MZI structure, and the upper and lower arms of the embedded MZI module are respectively provided with optical fibers of the same length; the double MZI shaping unit also includes an input coupler C1 and an output coupler C3, the embedded MZI module also includes an input coupler C4 and an output coupler C2; wherein, the shaping process of the optical signal is as follows:

[0049] The degraded multi-level PAM signal in the optical communication transmission link is input from port A, and after being amplified ...

Embodiment 2

[0055] On the basis of the above-mentioned embodiment 1, the embodiment of the present invention provides a design method of a dual-MZI multi-level PAM signal all-optical shaper, and optimizes the design based on the all-optical shaper described in embodiment 1. Before introducing the specific design method, at first in conjunction with Embodiment 1, the relationship between the parameters in the double MZI shaping unit is described; wherein, for the convenience of calculation, the direct efficiency ρ of the input coupler C4 4 It is a pre-determined fixed value, that is, the ρ is carried out in the range of (0,1) before the design 4 Value, in this embodiment to select ρ 4 =0.5 as an example, so as to facilitate the design and optimization of the other three couplers according to the direct efficiency of the input coupler C4. Each formula used in the embodiment of the present invention is also in ρ 4 = 0.5 based on the following details:

[0056] In the double MZI shaping un...

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Abstract

The present invention relates to the technical field of optical fiber communication, in particular to a dual-MZI multi-level PAM signal all-optical shaper and a design method thereof, wherein the all-optical shaper includes matching adjustable optical amplifiers and double-MZI shaping units connected front and rear , the upper arm of the double MZI shaping unit is an embedded MZI module, the lower arm is provided with an optical fiber, and the upper and lower arms of the embedded MZI module are respectively provided with optical fibers of the same length; the double MZI shaping unit also includes an input coupler C1 and an output coupler C3, the embedded MZI module further includes an input coupler C4 and an output coupler C2. The present invention provides an all-optical shaper with a double MZI structure, which effectively solves the degradation problem of multi-level PAM signals through parameter design, enriches the implementation methods of multi-level PAM signals in the field of all-optical shaping, and ensures The long-distance effective transmission of multi-level PAM optical signals in optical fiber communication systems is achieved, and the shaping performance can be further improved by increasing the value of the reference power point.

Description

【Technical field】 [0001] The invention relates to the technical field of optical fiber communication, in particular to a dual-MZI multi-level PAM signal all-optical shaper and a design method thereof. 【Background technique】 [0002] In optical fiber communication systems, with the rapid growth of global communication services, people have higher and higher requirements for transmission capacity, and in recent years, with the development of big data, Internet of Things and 5G related technologies, especially data With the development of the center, people's demand for transmission capacity is growing faster and faster. Generally, there are two ways to increase the communication capacity: increasing the bit rate and increasing the number of channels of wavelength division multiplexing. Wavelength division multiplexing technology has already been widely used in the industry. At present, the wavelength division multiplexing technology with 50G channel spacing and 96 channels ha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/293H04B10/25H04B10/54
CPCH04B10/293H04B10/541H04B10/25891
Inventor 孔祥健凌九红胡家艳吴凡胡毅马卫东
Owner GUANGXUN SCI & TECH WUHAN
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