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A fm-edfa automatic gain control device

A FM-EDFA and automatic gain control technology, applied in the field of optical communication, can solve the problems of unbalanced mode gain and large differential mode gain, etc., and achieve the effect of fast and accurate calculation and cost reduction

Active Publication Date: 2022-07-26
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies in the prior art, provide a kind of FM-EDFA automatic gain control device, by the modal comprehensive detection to FM-EDFA few-mode amplified signal, and adjust the FM-EDFA pump light according to the detection result Mode and power, to automatically control the mode gain of FM-EDFA, so as to solve the problem of unbalanced mode gain or large differential mode gain of the amplified signal in FM-EDFA

Method used

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  • A fm-edfa automatic gain control device
  • A fm-edfa automatic gain control device
  • A fm-edfa automatic gain control device

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Experimental program
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Embodiment

[0026] figure 1 It is a schematic diagram of an FM-EDFA automatic gain control device of the present invention.

[0027] In this embodiment, as figure 1 As shown, an FM-EDFA automatic gain control device of the present invention includes: a pump-adjustable FM-EDFA, a modal comprehensive detection module and a modal feedback control circuit;

[0028] like figure 2 As shown, the pump-tunable FM-EDFA includes a multiplexer, a few-mode erbium-doped fiber FM-EDF, a tunable pump unit and a pump stripper; wherein, the tunable pump unit further includes a pump light source, a modal Modulator and drive circuit;

[0029] In this embodiment, the tunable pump unit can be specifically implemented by "tunable pump laser array + mode selection photonic lantern" or "single pump laser + spatial light modulator";

[0030] Under the control of the pump control signal, the drive circuit adjusts the output power of the pump light source and the mode of the modal modulator respectively to gene...

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Abstract

The invention discloses an FM-EDFA automatic gain control device. By injecting a few-mode input signal into the FM-EDF together with multi-mode pump light in a pump-tunable FM-EDFA, the mode amplification is performed, and the amplified less The modal signal is sent to the modal comprehensive detection module to complete the modal comprehensive measurement of the few-mode amplified signal; the modal feedback control circuit generates the pump control signal and controls the adjustable pump unit to adjust the pump mode according to the modal comprehensive measurement results. components and their power levels, thereby realizing the automatic gain control function of the entire FM‑EDFA.

Description

technical field [0001] The invention belongs to the technical field of optical communication, and more particularly, relates to an FM-EDFA automatic gain control device. Background technique [0002] With the explosive growth of network traffic, the transmission capacity of single-mode optical fiber communication systems is gradually approaching the nonlinear Shannon limit. To meet the ever-increasing capacity demands of optical networks, space-division multiplexing technology has received more and more attention. Space-division multiplexing long-distance transmission systems are inseparable from space-division multiplexing optical amplifiers. Among them, few-mode or multi-core erbium-doped fiber amplifiers have the most extensive application scenarios, especially the few-mode erbium-doped fiber amplifier (FM-EDFA) not only It can be used to compensate mode attenuation in mode transmission and switching systems, and can also be used in few-mode nonlinear systems to increase...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/294H01S3/067
CPCH04B10/2942H01S3/06754
Inventor 武保剑江歆睿文峰邱昆
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA