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Lithium niobate-doped silica fiber Raman light amplification device

A technology of quartz optical fiber and amplification device, which is applied in cladding optical fiber, optical waveguide, optical waveguide, etc., and can solve the problem of small gain coefficient

Inactive Publication Date: 2018-11-06
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional FRA mainly uses ordinary single-mode fiber as the gain medium, and its gain coefficient is small, requiring long-distance and high-pumping conditions to obtain significant gain.

Method used

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  • Lithium niobate-doped silica fiber Raman light amplification device

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] see figure 1 , the lithium niobate doped silica fiber Raman optical amplification device, including signal source 1, optical isolator A 2, fiber Bragg grating 3, lithium niobate doped silica fiber 4, wavelength division multiplexing coupler 5, high power A pump laser 6, an optical isolator B 7, and an optical power meter 8 are characterized in that: the signal source 1 is connected to the optical isolator A 2 through a quartz optical fiber, and the optical isolator A 2 is connected through a lithium niobate-doped quartz optical fiber 4 A wavelength division multiplexing coupler, the fiber Bragg grating 3 is written on a lithium niobate-doped silica fiber 4 by phase masking, and the wavelength division multiplexing coupler 5 is connected to a high-power pump through a quartz fiber The laser 6 and the optical isolator B 7 are connected to the optical power meter 8 through a quartz optical fiber.

Embodiment 2

[0024] This embodiment is basically the same as Embodiment 1, and the special features are as follows:

[0025] The lithium niobate-doped silica fiber Raman optical amplifying device adopts a lithium niobate-doped silica fiber with low loss and high Raman gain coefficient as the gain medium of the amplifying device. The fiber Bragg grating 3 used to reflect the pump light is written on the lithium niobate-doped silica fiber 4 as the amplification medium, which reduces the connection loss between devices. Its amplification range is 1200~1650nm.

Embodiment 3

[0027] Such as figure 1 As shown, the lithium niobate-doped silica fiber Raman optical amplification device includes a signal source 1, an optical isolator A 2, a fiber Bragg grating 3, a lithium niobate-doped silica fiber 4, a wavelength division multiplexing coupler 5, High-power pump laser 6, optical isolator B 7, optical power meter 8; all parts are connected by quartz optical fiber, in which fiber Bragg grating 3 is written on lithium niobate-doped quartz optical fiber 4, optical isolator A 2. The central wavelength of the optical isolator B 7 and the fiber Bragg grating 3 matches the wavelength of the high-power pump laser 6 .

[0028] The principle of operation of the device is as follows:

[0029] The signal source 1 will be turned on, and then the power of the pump laser 6 will be adjusted. The input signal light and pump light will have a stimulated Raman scattering effect in the lithium niobate-doped silica fiber, thereby amplifying the signal light. The optical po...

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Abstract

The invention relates to a lithium niobate-doped silica fiber Raman light amplification device. The lithium niobate-doped silica fiber Raman light amplification device comprises a signal source, a first optical isolator, a fiber bragg grating, a lithium niobate-doped silica fiber, a wavelength division multiplexing coupling, a high-power pump laser, a second optical isolator, an optical power meter and the like. The various parts of the device are connected through the silica fiber, the lithium niobate-doped silica fiber is prepared through an improved chemical vapor deposition method, the preparation process is simple, and the finished fiber is low in loss and high in Raman gain coefficient; the fiber bragg grating is formed by writing on the lithium niobate-doped silica fiber, and therefore the connection loss generated by externally connecting a grating is avoided; and the high-power pump laser provides pump light needed by the amplification device, and the pump light and signal light generate a stimulated Raman scattering effect in the fiber to amplify the signal light. The lithium niobate-doped silica fiber Raman light amplification device is simple in structure, secure, stable, good in amplification effect and capable of achieving batch production.

Description

technical field [0001] The invention relates to a lithium niobate-doped quartz fiber Raman amplification device, which belongs to the field of optical fiber communication and optical fiber sensing. Background technique [0002] With the advent of the era of high-speed, large-bandwidth, and low-loss all-fiber communication, research on fiber amplifiers used in all-optical relays has become a top priority. The traditional erbium-doped fiber amplifier (EDFA) has the advantages of high gain, high output power, low noise, and polarization-independent, and has good amplification characteristics in the current communication band. [0003] However, with the development of wavelength division multiplexing system research towards larger capacity and longer transmission distance, EDFA has gradually become the "bottleneck" for further improvement of system capacity distance product. First of all, EDFA is limited by erbium ions, providing a gain bandwidth of about 70nm, which only accou...

Claims

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Application Information

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IPC IPC(8): H01S3/067H01S3/30G02B6/02
CPCG02B6/02138H01S3/06716H01S3/0675H01S3/302
Inventor 陈振宜郝平王廷云陈娜庞拂飞刘书朋
Owner SHANGHAI UNIV