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Optimal design method of few-mode erbium-doped optical fiber amplifier

An erbium-doped optical fiber, optimized design technology, applied in the field of optical signal processing, can solve the problems of expensive few-mode fiber amplifiers, manufacturing process errors, and high cost, and achieve the effects of high design efficiency, improved design efficiency, and easy implementation

Active Publication Date: 2020-10-09
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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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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  • Optimal design method of few-mode erbium-doped optical fiber amplifier
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  • Optimal design method of few-mode erbium-doped optical fiber amplifier

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Embodiment

[0038] figure 1 It is a flowchart 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, it is required to design the total gain of the signal light to be 5dB, 10dB, and 1...

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Abstract

The invention discloses an optimal design method of a few-mode erbium-doped optical fiber amplifier. The optimal design method comprises the following steps of: firstly, measuring a loss coefficient and a particle number inversion coefficient of each mode in a sample fiber; secondly, determining an inversion particle number and an erbium-doped fiber length required for achieving a designed gain target; and finally, calculating and verifying whether the gain performance of each mode of signal light meets a design requirement or not. Therefore, according to the designed target gain, the erbium-doped fiber amplifier is optimally designed in a mode of reversing the particle number as required, and the erbium-doped fiber amplifier has the advantages of high design efficiency, easiness in implementation and high 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 Applications(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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