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All-fiber wavelength interval variable switchable multi-wavelength laser

A technology of multi-wavelength lasers and wavelength intervals, which is applied in the fields of instrumentation and optical fiber communication, and can solve problems such as changes

Pending Publication Date: 2019-04-05
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem mainly solved by the present invention is to solve the problem that many fiber lasers cannot change the wavelength interval while realizing the switchable output wavelength, and proposes a switchable multi-wavelength laser with variable wavelength interval of all-fiber

Method used

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  • All-fiber wavelength interval variable switchable multi-wavelength laser

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Effect test

Embodiment approach 1

[0019] An all-fiber switchable multi-wavelength laser with variable wavelength spacing, such as figure 1 As shown, it includes a pump light source (01), a wavelength division multiplexer (02), an erbium-doped fiber (03), a polarization controller 1 (04), a polarization-dependent isolator (05), and a fiber 50:50 coupler 1 (06), polarization controller 2 (07), polarization-maintaining fiber 1 (08) with a length of 75 cm, polarization controller 3 (09), polarization-maintaining fiber 2 (10) with a length of 75 cm, fiber 50: 50 Coupler 2(11).

[0020] The pump light source 01 is connected to the first port 021 on the right side of the wavelength division multiplexer 02 , and the left port 023 of the wavelength division multiplexer 02 is connected to one end of the erbium-doped optical fiber 03 . The second port 022 on the right side of the wavelength division multiplexer 02 is connected to the first port 111 on the left side of the optical fiber 50:50 coupler 11 . The left end 0...

Embodiment approach 2

[0021] The difference between the second embodiment and the first embodiment is that

[0022] The doped fiber 03 is an ytterbium-doped fiber, and the lengths of the polarization-maintaining fiber 1 and the polarization-maintaining fiber 2 are 35 cm.

Embodiment approach 3

[0023] Embodiment 3 differs from Embodiment 1 and Embodiment 2 in that

[0024] The doped fiber 03 is a thulium-doped fiber, and the lengths of the polarization-maintaining fiber 1 and the polarization-maintaining fiber 2 are 1.2 meters.

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Abstract

The invention relates to an all-fiber wavelength interval variable switchable multi-wavelength laser and belongs to the field of optical fiber communication and instruments. When number of output wavelengths is changed, intervals of the wavelengths also can be changed. The laser is characterized in that a polarization controller (07) and a polarization-maintaining optical fiber (08) are sequentially connected between a left side port 061 of an optical fiber coupler (06) and a right side port 113 of an optical fiber coupler (11); a polarization controller (09) and a polarization-maintaining optical fiber (10) are sequentially connected between a left side port 062 of the coupler (06) and a right side port 114 of the coupler (11), and two Lyot filters are formed, so that interference occursin output spectrums of the two filters; and a polarization controller (04), a polarization-dependent isolator (05), a polarization controller (07) and a polarization controller (09) form nonlinear polarization rotation effect, mode competition is inhibited, and changes of the number and intervals of the wavelengths can be realized by regulating the three polarization controllers. The laser provided by the invention has the advantages of simple structure and variability in the intervals and number of the wavelengths and is applicable to a wavelength division multiplexing system.

Description

technical field [0001] The invention relates to a switchable multi-wavelength laser with variable all-fiber wavelength interval, which belongs to the fields of optical fiber communication and instrumentation. Background technique [0002] With the development of modern society, the rapid rise of the information technology industry, the exponential increase in the number of global Internet users, and the continuous increase in communication capacity, wavelength division multiplexing technology has become a commonly used technology in optical communication networks. The principle of this technology is to multiplex multiple wavelengths into one optical fiber for transmission. However, the multiplexing of multiple wavelengths means that multiple laser light sources are required. If a semiconductor laser array is used as a laser light source, the cost and complexity of the communication system will be greatly increased. [0003] Multi-wavelength fiber lasers have the advantages ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067H01S3/10
CPCH01S3/06712H01S3/06716H01S3/10061
Inventor 裴丽赵琦宁提纲郑晶晶解宇恒
Owner BEIJING JIAOTONG UNIV
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