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Far-end pumping erbium-doped optical fiber amplifier

An erbium-doped optical fiber and amplifier technology, which is applied in the field of remote pumping erbium-doped optical fiber amplifiers, can solve the problems of low laser power conversion efficiency, large Raman frequency shift spectral bandwidth, and low efficiency of pump sources, etc., to overcome Raman The effect of low frequency shift efficiency, large signal gain, and long pump transmission distance

Inactive Publication Date: 2015-09-30
NO 34 RES INST OF CHINA ELECTRONICS TECH GRP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the stimulated Raman scattering is bidirectional transmission, so the laser power conversion efficiency of the Raman frequency shift generated by the stimulated Raman scattering is low, and the Raman frequency shift spectral bandwidth is large, and the laser power available to the erbium-doped fiber amplifier is not large. Not large, so the efficiency of the 1390nm laser as the pump source of the remote pump optical amplifier is not high, and it cannot meet the pump power requirements of the erbium-doped fiber amplifier

Method used

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Embodiment 1

[0016] The structure of embodiment 1 of this remote pumped erbium-doped fiber amplifier is as follows figure 1 As shown, in this example, the pump light source is a high-power laser output from a 1390nm single-mode fiber, the pump transmission fiber is an ordinary single-mode fiber, and the fiber length is 100km. A fiber Bragg grating with a center wavelength of 1480nm and a reflectivity of 99% is added to the end of the pump transmission fiber close to the pump light source to connect to the pump light source. The other end of the pump transmission fiber close to the erbium-doped fiber amplifier is connected to the erbium-doped fiber amplifier through a Bragg fiber grating with a center wavelength of 1480 nm and a reflectivity of 10%. The erbium-doped fiber amplifier in this example is a 1480nm laser-pumped single-stage erbium-doped fiber amplifier.

[0017] In this example, the optical transmitter is connected to the erbium-doped optical fiber amplifier through a 100km sign...

Embodiment 2

[0019] The structure of Embodiment 2 of this remote pumped erbium-doped fiber amplifier is as follows figure 2 As shown, the structure of the pumping light source, the pumping transmission fiber, the 1480nm fiber grating with high reflectivity and the 1480nm fiber grating with low reflectivity is the same as that of embodiment 1, the difference is that the pump transmission fiber of this example is an ultra-low loss optical fiber. The pumping light source 1390nm high-power laser is connected to one end of a 70km pump transmission fiber through a high reflectivity 1480nm fiber grating, and the other end of the pump transmission fiber is connected to a low reflectivity 1480nm fiber grating, and then another 70km pump transmission The optical fiber is connected to the erbium-doped fiber amplifier; the optical signal s output by the optical transmitter of this example is directly input to the erbium-doped fiber amplifier, and the output of the erbium-doped fiber amplifier is conn...

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Abstract

The invention provides a far-end pumping erbium-doped optical fiber amplifier. The amplifier comprises a pump light source and an erbium-doped optical fiber amplifier body which are connected through a pump transmission optical fiber, wherein the pump light source is a high-power laser with a wavelength being 1390nm, one end of the pump transmission optical fiber is connected with the pump light source through a high-reflectivity fiber bragg grating with a wavelength being 1480nm, and the other end of the pump transmission optical fiber is connected with the erbium-doped optical fiber amplifier body through a low-reflectivity fiber bragg grating with a wavelength being 1480nm. A laser resonance cavity is formed by the fiber bragg grating pair, and high-efficiency frequency shift from laser with the wavelength being 1390nm to laser with the wavelength being 1480nm is realized. The far-end pumping erbium-doped optical fiber amplifier overcomes the defect of low Raman frequency shifting efficiency in 1390nm laser transmission, sufficient 1480nm pump laser can be obtained after longer optical fiber transmission, the power of 1480nm pump laser obtained through the optical fiber amplifier is increased by more than 3dB than that of the 1480nm pump laser obtained in a traditional manner; with the adoption of the far-end pumping erbium-doped optical fiber amplifier, a larger signal gain can be obtained under the condition of the same distance, or a further pump transmission distance can be realized under the condition of the same signal gain.

Description

technical field [0001] The invention relates to an optical fiber amplifier, in particular to a remote pumping erbium-doped optical fiber amplifier used in an optical fiber communication system. Background technique [0002] The remote pumped erbium-doped fiber amplifier (referred to as the remote pumped optical amplifier) ​​is the main relay optical amplifier of the optical fiber communication system. The erbium fiber amplifier is used for pumping, and the relay point does not need power supply. A conventional far-pumped optical amplifier is pumped by a 1480nm high-power laser or a 1390nm high-power laser. The transmission process of the 1480nm high-power laser in the optical fiber is not only due to the loss of optical fiber transmission, which reduces its optical power, but also is affected by stimulated Raman scattering when the transmission distance is long, so that most of the power of the pump laser is transferred to the Near the wavelength of 1570nm, the transmissio...

Claims

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Application Information

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IPC IPC(8): H01S3/067H01S3/094H01S3/08G02F1/39
Inventor 刘志强岳耀笠
Owner NO 34 RES INST OF CHINA ELECTRONICS TECH GRP
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