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An Optimal Design Method for Few-Mode Erbium-Doped Fiber Amplifier

An erbium-doped optical fiber, optimized design technology, applied in the field of optical signal processing, can solve the problems of manufacturing process error, cost, access, etc., and achieve the effects of strong adaptability, easy implementation, and improved design efficiency

Active Publication Date: 2021-06-04
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Obviously, this traditional design method not only relies on expensive hardware resources and software simulation tools, but even if the design parameters are determined, the manufacturing process will bring errors, resulting in a large difference from the actual gain performance
Because of this, the current few-mode fiber amplifier is still very expensive, about 30-50 times that of the wavelength division multiplexing fiber amplifier

Method used

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  • An Optimal Design Method for Few-Mode Erbium-Doped Fiber Amplifier
  • An Optimal Design Method for Few-Mode Erbium-Doped Fiber Amplifier
  • An Optimal Design Method for Few-Mode Erbium-Doped Fiber Amplifier

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Embodiment

[0038] figure 1 It is a flow chart of an optimal design method for a few-mode erbium-doped fiber amplifier of the present invention.

[0039] In this example, if figure 1 Shown, the optimal design method of a kind of few-mode erbium-doped fiber amplifier of the present invention comprises the following steps:

[0040] S1, intercept a section of length L sample =1m erbium-doped fiber is used as a sample fiber, and its doping distribution and refractive index distribution are unknown;

[0041] S2. Sequentially inject different modes of signal light and pump light into the sample fiber as probe light, and respectively measure the loss coefficients of different modes of signal light and pump light in the sample fiber;

[0042] S2.1. First, according to the design requirements, we pre-set the initial wavelength, mode and preset power value of the signal light and the pump light; in this embodiment, the total gain of the designed signal light is required to be 5dB, 10dB, and 15dB...

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Abstract

The invention discloses an optimal design method for a few-mode erbium-doped optical fiber amplifier. Firstly, the loss coefficient and the particle number inversion coefficient of each mode in the sample fiber are measured, and then the inversion particle number and the doped particle number required to achieve the design gain target are determined. The length of the erbium fiber, and finally calculate and verify whether the gain performance of each mode of the signal light meets the design requirements; in this way, according to the design target gain, the erbium-doped fiber amplifier is optimally designed by inverting the number of particles, which has high design efficiency, The advantages of easy implementation and strong adaptability.

Description

technical field [0001] The invention belongs to the technical field of optical signal processing, and more specifically relates to an optimal design method of a few-mode erbium-doped optical fiber amplifier. Background technique [0002] With the rapid development of Internet, mobile Internet, cloud computing and other services, the demand for transmission capacity of communication systems is increasing exponentially every year. However, the communication capacity of the WDM system using single-mode fiber as the transmission medium is limited by the nonlinear Shannon limit. In order to solve this contradiction, the mode division multiplexing technology, as a method to further effectively improve the optical fiber transmission capacity, has been valued by various countries. [0003] The mode-division multiplexing system is inseparable from the few-mode erbium-doped fiber amplifier, which is a key device for compensating mode attenuation and realizing long-distance signal tra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/067H01S3/00
CPCH01S3/0014H01S3/06716H01S3/06754
Inventor 武保剑江歆睿文峰邱昆
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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