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High-stability multi-wavelength fiber laser with adjustable wavelength interval

A fiber laser, high stability technology, applied in the field of optical fiber communication, instrumentation, can solve the problem of not being able to maintain long-term stability

Pending Publication Date: 2020-06-05
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem mainly solved by the present invention is to solve the problem that many fiber lasers cannot maintain long-term stability while realizing multi-wavelength laser output, and proposes a high-stability multi-wavelength fiber laser with adjustable wavelength interval

Method used

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  • High-stability multi-wavelength fiber laser with adjustable wavelength interval
  • High-stability multi-wavelength fiber laser with adjustable wavelength interval
  • High-stability multi-wavelength fiber laser with adjustable wavelength interval

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0016] A highly stable multi-wavelength fiber laser with adjustable wavelength interval, such as figure 1 As shown, it includes a pump light source (01), a wavelength division multiplexer (02), an erbium-doped fiber (03), a fiber coupler (04), a highly nonlinear fiber (05), a polarization controller (06 ), fiber coupler two (07), fiber coupler three (08), polarization controller two (09), polarization maintaining fiber one (10), polarization controller three (11), polarization maintaining fiber two (12).

[0017] The pump light source 01 is connected to the input end of the wavelength division multiplexer 02 , and the port one 021 of the wavelength division multiplexer 02 is connected to one end of the erbium-doped optical fiber 03 . The other port of the input end of the wavelength division multiplexer 02 is connected to the left port 071 of the fiber coupler 2 07 . The right port 031 of the erbium-doped fiber 03 is connected to the first fiber coupler 04, and the port 041 o...

Embodiment approach 2

[0018] The difference between the second embodiment and the first embodiment is that

[0019] The doped fiber 03 is an ytterbium-doped fiber, the length of the highly nonlinear fiber 05 is greater than 100 meters, and the length difference between the first polarization-maintaining fiber (10) and the second polarization-maintaining fiber (12) is greater than or equal to 0.5 meters.

Embodiment approach 3

[0020] Embodiment 3 differs from Embodiment 1 and Embodiment 2 in that

[0021] The doped fiber 03 is a thulium-doped fiber, the length of the highly nonlinear fiber 05 is greater than 120 meters, and the length difference between the first polarization-maintaining fiber (10) and the second polarization-maintaining fiber (12) is greater than or equal to 0.8 meters.

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Abstract

The invention discloses a high-stability multi-wavelength optical fiber laser with adjustable wavelength intervals, and belongs to the field of optical fiber communication and instruments and meters.According to the laser, a polarization controller II (09), a polarization maintaining optical fiber I (10), a polarization controller III (11) and a polarization maintaining optical fiber II (12) aresequentially connected between an interface 081 and an interface 082 of an optical fiber coupler I (08) to form a double-order Sagnac filter. A pump (01),a wavelength division multiplexer (02), an erbium-doped optical fiber (03), a first optical fiber coupler (04), a high-nonlinearity optical fiber (05), a first polarization controller (06) and a second optical fiber coupler (07) jointly form an NALM-NOLM structure, mode competition is inhibited, and the laser output stability is greatly improved. The wavelength interval can be changed by adjusting two polarization controllers in the filter. The laser has the advantages of simple structure, flexible output wavelength and the like, and is suitable for a wavelength division multiplexing system.

Description

technical field [0001] The invention relates to a high-stability multi-wavelength optical fiber laser with adjustable wavelength interval, which belongs to the fields of optical fiber communication and instrumentation. Background technique [0002] With the rapid rise of the information technology industry in modern society, the number of global Internet users is increasing exponentially, and the communication capacity is constantly increasing. DWDM systems can effectively increase the communication capacity by increasing the number of channels in the system. The working principle of the system is to multiplex multiple wavelength optical signals into the optical fiber for transmission. Usually, the laser light source signal used in the system is a DFB semiconductor laser array, and each laser in the array outputs a light source signal. Although the idea and idea Simple, but will greatly increase the cost and complexity of the communication system. Due to its simple structur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067H01S3/094H01S3/10H01S3/137
CPCH01S3/067H01S3/10061H01S3/137H01S3/094053
Inventor 赵琦裴丽宁提纲郑晶晶解宇恒李晶
Owner BEIJING JIAOTONG UNIV
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