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Four-line polarization mode signal light online erbium-doped optical fiber amplifier and running method thereof

A technology of erbium-doped fiber and four-line polarization, which is applied in the field of optical communication, can solve problems such as unstable transmission of high-order pump modes, difficulty in preparing erbium-doped fiber, and limited adjustable range, so as to overcome the influence of mode gain control, The effect of process simplification and large adjustable range

Active Publication Date: 2015-03-25
GUILIN UNIV OF ELECTRONIC TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The problems of these schemes are: based on the improved chemical vapor deposition method, it is difficult to prepare such a complex design of erbium-doped fiber; the transmission of high-order pump modes is unstable; Due to the impact of competition, the dynamic adjustable range of each mode gain is limited, which is not conducive to overcoming the mode-related loss in the MDM transmission process, etc.

Method used

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  • Four-line polarization mode signal light online erbium-doped optical fiber amplifier and running method thereof
  • Four-line polarization mode signal light online erbium-doped optical fiber amplifier and running method thereof
  • Four-line polarization mode signal light online erbium-doped optical fiber amplifier and running method thereof

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Embodiment 1

[0035] This four-line polarization mode signal light on-line erbium-doped fiber amplifier embodiment 1 structure block diagram is as follows figure 1 shown. The first mode multiplexing module 1, the first erbium-doped optical fiber 2, the second erbium-doped optical fiber 3 and the second mode multiplexing module 4 are sequentially connected, and the first pumping module 5 is connected to the first mode multiplexing module 4, The first erbium-doped optical fiber 2 and the second erbium-doped optical fiber 3 are spliced ​​by a fiber fusion splicer, and the splicing loss is negligible.

[0036] The four-linear polarization mode signal light P in this example is the fundamental mode LP of the C-band 01 , higher order mode LP 11 、LP 21 and LP 02 For the signal light, the power of the signal light of each mode injected into the first erbium-doped optical fiber 2 through the first mode multiplexing module is -10dBm.

[0037] In this example, the first pumping module 5 is a forw...

Embodiment 2

[0054] This four-line polarization mode signal light on-line erbium-doped fiber amplifier embodiment 2 structure block diagram is as follows Figure 8 As shown, the difference from Example 1 is:

[0055] (1) There are two pumping modules, the first pumping module 5 and the second pumping module 6 . The first pump module 5 is a forward pump module, which produces 980nm LP 11 mode pumping light; the second pumping module 6 is a backward pumping module, which produces 980nm LP 11 Mode pump light;

[0056] (2) The structure of the second mode multiplexing module 4 is as Figure 9 As shown, the angle between the dichroic beam splitter B42 and the axes of the first lens B41 and the second lens B43 is 135 degrees.

[0057] Other structures are the same as in Embodiment 1.

[0058] The operation method of this example is similar to that of Embodiment 1, the difference is: in the step III, the LP inputted through the second mode multiplexing module 4 11 The mode pumping light is ...

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Abstract

The invention discloses a four-line polarization mode signal light online erbium-doped optical fiber amplifier and a running method thereof. The amplifier comprises a first mode multiplexing module, a first erbium-doped optical fiber, a second erbium-doped optical fiber and a second mode multiplexing module, fiber core erbium particles of the first erbium-doped optical fiber are doped annularly, a fiber core of the second erbium-doped optical fiber is doped centrally, and four-line polarization mode signal light and LP11 mode pumping light generated by a first pumping module are injected into the first erbium-doped optical fiber through the first mode multiplexing module. The running method includes that the pumping light and the signal light are subjected to beam combination and enter the first erbium-doped optical fiber, and centrifugal mode signal light acquires high optical gain; the pumping light and the signal light enter the second erbium-doped optical fiber, and central mode signal light acquires high optical gain; remaining pumping light is filtered, and amplified four-line polarization mode signal light is output. By the amplifier and the running method, the process for preparing erbium-doped optical fibers through a chemical vapor disposition method is simplified, only the LP11 mode pumping light is needed while the four-line polarization mode signal light is amplified, and centrifugal mode signal light gain and central mode signal light gain can be controlled respectively.

Description

technical field [0001] The invention relates to optical communication technology, in particular to an online erbium-doped optical fiber amplifier and an operation method for a four-line polarization mode signal light. Background technique [0002] In recent years, single-mode optical fiber communication is limited by the inherent nonlinearity of optical fiber and the spontaneous emission of amplifiers, and its capacity approaches the Shannon limit. In order to meet the future high-capacity communication needs, the unused optical fiber space degree of freedom has become a new focus of attention. At present, mode division multiplexing (MDM) is widely concerned, and it is one of the important research directions that may break through the Shannon limit of optical fiber. According to information theory, each mode in few-mode fiber can be used as an independent transmission channel; if the transmission characteristics such as nonlinearity and noise of the mode are comparable to ...

Claims

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Application Information

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IPC IPC(8): G02F1/39
CPCG02F1/395
Inventor 秦祖军袁明杨凯张文涛叶松王新强蒋曲博熊显名
Owner GUILIN UNIV OF ELECTRONIC TECH
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