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Amplifier based on distributed filter

A filter amplification module and filter technology, which is applied in the direction of lasers, phonon exciters, laser components, etc., can solve the problems of noise generation and noise amplification, and achieve the effects of reducing loss, ensuring strength, and suppressing noise

Active Publication Date: 2020-08-04
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the above-mentioned deficiencies in the prior art, an amplifier based on a distributed filter provided by the present invention solves the problem of noise amplification or generation of new noise when erbium-doped fiber amplifiers and Raman fiber amplifiers amplify signal light in the prior art The problem

Method used

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Examples

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Embodiment 1

[0034] In this embodiment, the central wavelength of the signal light emitted by the signal light source is 1550 nm, the filter is a long-period fiber grating filter, and the filtering and amplifying module further includes a first wavelength division multiplexer, N=4.

[0035] Such as figure 2 As shown, when the optical fiber with amplification function is an erbium-doped optical fiber, the wavelength of the light emitted by the pump light source is 980nm, and N long-period fiber grating filters are written on the erbium-doped optical fiber; the first wavelength division multiplexer The input end is the input end of the filtering and amplifying module, and the output end thereof is connected with the second optical isolator through an erbium-doped optical fiber.

[0036] Such as image 3 As shown, when the optical fiber with amplification function is a single-mode optical fiber, the wavelength of the light emitted by the pump light source is 1450nm, and N long-period fiber ...

Embodiment 2

[0038] In this embodiment, the central wavelength of the signal light emitted by the signal light source is 1550 nm, the filter is a thin-film filter, and the filtering and amplifying module further includes a first wavelength division multiplexer, N=10.

[0039] Such as Figure 4 As shown, when the optical fiber with amplification function is an erbium-doped optical fiber, the wavelength of the light emitted by the pump light source is 980nm, the input end of the first wavelength division multiplexer is the input end of the filter amplification module, and its output end, N thin film The filter and the second optical isolator are sequentially connected through an erbium-doped optical fiber.

[0040] Such as Figure 5 As shown, when the optical fiber with amplification function is a single-mode optical fiber, the wavelength of the light emitted by the pump light source is 1450nm, the input end of the first wavelength division multiplexer is the input end of the filter amplifi...

Embodiment 3

[0042] In this embodiment, the central wavelength of the signal light emitted by the signal light source is 1550 nm, the filter is a filter structure, and N=2.

[0043] Such as Figure 6 As shown, when the optical fiber with the amplification function is an erbium-doped optical fiber, the wavelength of the light emitted by the pump light source is 980nm, and the filtering and amplifying module includes N filtering structures connected in sequence through the erbium-doped optical fiber, and the filtering and amplifying module passes through doped The erbium fiber is connected to the second optical isolator.

[0044] Such as Figure 7 As shown, when the optical fiber with the amplification function is a single-mode optical fiber, the wavelength of the light emitted by the pump light source is 1450nm, and the filtering and amplifying module includes N filtering structures connected sequentially through the single-mode optical fiber, and the filtering and amplifying module passes...

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Abstract

The invention discloses an amplifier based on a distributed filter. The amplifier comprises a pump light source, a first optical isolator, a filtering and amplifying module and a second optical isolator, an output end of the pump light source is connected with an input end of the filtering and amplifying module through an optical fiber, an output end of the filtering and amplifying module is connected with an input end of the second optical isolator, and an output end of the second optical isolator is an output end of the amplifier based on the distributed filter. An input end of the first optical isolator is connected with a signal light source, and an output end of the first optical isolator is connected with an input end of a first wavelength division multiplexer. The optical fiber distance for realizing the amplification function is long, N filters are placed on an optical fiber for realizing the amplification function, the multistage noise reduction is realized, and the signal-to-noise ratio is further improved.

Description

technical field [0001] The invention belongs to the field of optical fiber sensing, and in particular relates to an amplifier based on a distributed filter. Background technique [0002] Erbium-doped fiber amplifiers and Raman fiber amplifiers are widely used in the fields of optical fiber communication, fiber lasers and fiber optic sensing, and have become an indispensable optical amplifier. Wavelength division multiplexing technology has continuously improved the capacity of optical fiber communication, allowing more channels of optical carriers to be transmitted simultaneously in one optical fiber. The successful application of erbium-doped fiber amplifiers and Raman fiber amplifiers has enabled wavelength division multiplexing technology to truly Play a role, realize long-distance, large-capacity all-optical transmission, and lay the foundation for long-distance optical fiber communication and long-distance optical fiber sensing. When the basic erbium-doped fiber amplif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067H01S3/10
CPCH01S3/06758H01S3/06716H01S3/10023
Inventor 冉曾令肖彦波饶云江吴茜陈静徐涛
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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