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Tunable laser based on dual interference of dual-core optical fiber and Sagnac ring

A technology for tuning lasers and dual-core optical fibers. It is applied in the fields of instrumentation and optical fiber communications. It can solve the problems that fiber lasers do not have changes in the number of wavelengths and wavelength intervals, and achieve the effect of increasing the tunable range of output wavelengths and flexibly changing them.

Inactive Publication Date: 2020-09-25
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It should be pointed out that the fiber lasers built by the above methods do not have the performance to simultaneously realize the tuning of the wavelength range, the number of wavelengths and the change of the wavelength interval.

Method used

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  • Tunable laser based on dual interference of dual-core optical fiber and Sagnac ring
  • Tunable laser based on dual interference of dual-core optical fiber and Sagnac ring
  • Tunable laser based on dual interference of dual-core optical fiber and Sagnac ring

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0021] Tunable lasers based on dual-core fiber and Sagnac ring double interference, such as figure 1 As shown, it includes pump light source 01, wavelength division multiplexer 02, gain fiber 03, fiber with high nonlinear coefficient 04, fiber coupler-05, polarization controller-06, polarization-maintaining fiber 07, dual-core fiber 08. Fiber coupler 209. Polarization controller 210.

[0022] The pump light source 01 is connected to the input end of the wavelength division multiplexer 02, the left port one 022 of the wavelength division multiplexer is connected to one end of the gain fiber 03, the left port two 031 of the gain fiber 03 is connected to the The optical fiber 04 is connected, the left port three 041 of the optical fiber 04 with high nonlinear coefficient is connected to the port four 051 of the fiber coupler one 05, and the port five 061 and the six port 071 of the fiber coupler one 05 are connected in sequence A polarization controller 06 and a polarization mai...

Embodiment approach 2

[0024] Tunable lasers based on dual-core fiber and Sagnac ring double interference, such as figure 1As shown, the pump light source 01 is connected to the input end of the wavelength division multiplexer 02, the left port one 022 of the wavelength division multiplexer is connected to one end of the gain fiber 03, and the left port two 031 of the gain fiber 03 is connected to the The optical fiber with nonlinear coefficient 04 is connected, and the left port three 041 of the optical fiber 04 with high nonlinear coefficient is connected with the port four 051 of the fiber coupler one 05, and the port five 061 and the port six 071 of the fiber coupler one 05 are connected by The first polarization controller 06 and the polarization maintaining fiber 07 are connected sequentially. The port seven 081 on the right side of the wavelength division multiplexer 02 is connected to the dual-core fiber 08, the right port of the dual-core fiber 08 is connected to the port eight 091 of the f...

Embodiment approach 3

[0026] Tunable lasers based on dual-core fiber and Sagnac ring double interference, such as figure 1 As shown, the pump light source 01 is connected to the input end of the wavelength division multiplexer 02, the wavelength division multiplexer 02 is connected to one end of the gain fiber 03, and the left port 031 of the gain fiber 03 is connected to the fiber with high nonlinear coefficient 04 connected,

[0027] Port three 041 is connected to port four 051 of fiber coupler one 05, and polarization controller one 06 and polarization-maintaining fiber 07 are connected to ports five 061 and six ports 071 of fiber coupler one 05 in sequence. The port seven 081 on the right side of the wavelength division multiplexer 02 is connected to the dual-core fiber 08, the right port of the dual-core fiber 08 is connected to the port eight 091 of the fiber coupler 09, and the port nine 101 of the fiber coupler 09 and the port Between ten and 102, access polarization controller two and 10....

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Abstract

The invention provides a tunable laser based on dual interference of a dual-core optical fiber and a Sagnac ring. Tuning of a wavelength range, change of the number of wavelengths and change of wavelength intervals can be achieved at the same time. In the optical fiber laser, a polarization controller I and a polarization maintaining optical fiber are connected between two ports of an optical fiber coupler I to form a Sagnac optical fiber filter, so that wavelength tuning in a gain range is realized. The wavelength interval can be changed by adjusting the optical fiber stress frame of the double-core optical fiber Mach-Zehnder filter. By using the optical fiber with a high nonlinear coefficient, a four-wave mixing effect can be formed, wavelength competition is inhibited, and stable wavelength output is facilitated. Meanwhile, the change of the number of wavelengths can be realized by changing the pumping power. The laser is simple in structure, flexible in output wavelength and beneficial to application in optical communication and optical wavelength division multiplexing systems.

Description

technical field [0001] The invention relates to a tunable laser based on dual-core optical fiber and Sagnac ring double interference, and belongs to the fields of optical fiber communication and instrumentation. Background technique [0002] With the advent of the information age, earth-shaking changes have taken place in human society. People's requirements for communication speed and communication capacity have been greatly improved. Optical fiber communication came into being and played an important role. Due to the development of high-capacity optical fiber communication networks, wavelength division multiplexing technology has been widely used, especially dense wavelength division multiplexing (DWDM) has become the most economical and effective way to upgrade and expand optical fiber communication systems. The multi-wavelength fiber laser with the advantages of simple structure, good compatibility, stable output laser, and low price provides an ideal light source for DW...

Claims

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Application Information

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IPC IPC(8): H01S3/067H01S3/10
CPCH01S3/06712H01S3/06737H01S3/1003
Inventor 赵琦裴丽王建帅宁提纲郑晶晶李晶解宇恒
Owner BEIJING JIAOTONG UNIV
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