Double-MZI multi-level PAM signal all-optical shaping device and design method thereof

A technology of optical shaper and design method, applied in electromagnetic transmitters, optical fiber transmission, electrical components, etc., can solve the problems of difficult shaping technology and difficult optical domain shaping, and achieves improvement of shaping performance, optimization of shaping performance, and ensuring long distance. The effect of efficient transmission

Active Publication Date: 2019-04-05
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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  • Double-MZI multi-level PAM signal all-optical shaping device and design method thereof
  • Double-MZI multi-level PAM signal all-optical shaping device and design method thereof
  • Double-MZI multi-level PAM signal all-optical shaping device and design method thereof

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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 invention relates to a double-MZI multi-level PAM signal all-optical shaping device and a design method thereof, and belongs to the technical field of fiber communication. The all-optical shapingdevice comprises a matching light adjustable amplifier and a double-MZI shaping unit connected front and back, an upper arm of the double-MZI shaping unit includes an embedded MZI module, a lower armof the double-MZI shaping unit is provided with fibers, and upper and lower arms of the embedded MZI module are provided with fibers in the same length; and the double-MZI shaping unit further includes an input coupler C1 and an output coupler C3, and the embedded MZI module further comprises an input coupler C4 and an output coupler C2. The all-optical shaping device of the double MZI structure can solve the problem of deterioration of multi-level PAM signals by parameter design, the multi-level PAM signals can be realized in more ways in the all-optical shaping field, it is ensured that themulti-level PAM signals are transmitted effectively in long distance in a fiber communication system, and the shaping performance can be further improved by increasing the value of a 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 Applications(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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