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All-fiber transverse mode switchable high-order mode Brillouin laser

A laser and all-fiber technology, which is applied in the field of optical communication, can solve problems such as unfavorable development of all-fiber communication systems, and achieve the effects of easy promotion and use, good stability, and high switching accuracy

Active Publication Date: 2018-09-18
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Not conducive to the development of high-capacity and integrated all-fiber communication systems

Method used

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  • All-fiber transverse mode switchable high-order mode Brillouin laser
  • All-fiber transverse mode switchable high-order mode Brillouin laser
  • All-fiber transverse mode switchable high-order mode Brillouin laser

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Embodiment 1

[0036] Such as figure 1 Shown is an all-fiber zero-order and first-order switchable Brillouin laser in this embodiment, including a narrow linewidth pump laser 1, an optical amplifier 2, a 1×N optical switch 3 (N=2), A first fiber mode selective coupler 4 , a second fiber mode selective coupler 5 , a first polarization controller 7 , a fiber circulator 8 , a fiber coupler 9 , a second polarization controller 10 and a few-mode fiber 11 .

[0037] In this embodiment, the narrow-linewidth pump laser 1 is a narrow-linewidth semiconductor laser or a narrow-linewidth fiber laser with tunable C-band power. The laser linewidth is lower than 1 MHz, and the pigtail is a single-mode fiber.

[0038] The optical amplifier 2 is a high-gain erbium-doped optical fiber amplifier or a 1550nm band semiconductor optical amplifier, and the pigtail is a single-mode optical fiber.

[0039] The 1×N optical switch 3 (N=2) selects an optical fiber coupler with an adjustable splitting ratio, including ...

Embodiment 2

[0049] Such as Figure 7 Shown is an all-fiber transverse-mode switchable high-order mode Brillouin laser, which includes a narrow-linewidth pump laser 1, an optical amplifier 2, a 1×N optical switch 3 (N>2), and a fiber mode-selective coupling group, a first polarization controller 7, a fiber circulator 8, a fiber coupler 9, a second polarization controller 10 and a few-mode fiber 11.

[0050] The 1×N optical switch 3 includes an input port and N output ports 301 to 30N;

[0051] The fiber mode selective coupler group includes N fiber mode selective couplers, respectively denoted as the first fiber mode selective coupler 4, the second fiber mode selective coupler 5 to the Nth fiber mode selective coupler 6; N fiber mode selective couplers The mode selective couplers all include a first port, a second port, a third port and a fourth port; the fourth port of the N-1th fiber mode selective coupler is connected to the third port of the Nth fiber mode selective coupler;

[0052]...

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Abstract

The invention discloses an all-fiber transverse mode switchable high-order mode Brillouin laser. The laser comprises a narrow linewidth pump laser, an optical amplifier, a 1xN optical switch (N is greater than or equal to 2), a fiber mode selection coupler group, a first polarization controller, a fiber circulator, a fiber coupler, a second polarization controller and a few-mode fiber. According to the laser, on the basis of Brillouin nonlinear gain of the few-mode fiber in a ring cavity, resonance amplification of a specific-order transverse mode in the cavity is realized, and the transversemode switchable high-order mode laser output is obtained. According to the laser, an all-fiber structure is employed; the laser has the advantages that the structure is simple, the cost is low, a fiber system is integrated easily, the stability of the output laser is high, and the linewidth is narrow; and the practicability and reliability of the high-order mode laser are improved.

Description

technical field [0001] The invention relates to the technical field of optical communication, in particular to an all-fiber transverse-mode switchable high-order mode Brillouin laser. Background technique [0002] Fiber laser, due to its advantages in lower threshold, system compatibility, wavelength tunability, flexibility, stability, and compactness, is a new type of laser technology that has developed rapidly in recent years. Multiplexing system, optical time division multiplexing system, optical wireless communication system, high-performance optical fiber sensor network, optical measurement, laser processing, laser medical treatment, laser radar and other fields have extremely broad application prospects. As an ideal choice for multi-channel light sources in wavelength division multiplexing systems and fiber optic sensor networks, wavelength-tunable fiber lasers and multi-wavelength fiber lasers have attracted much attention. At present, a common way to realize a wavel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/094H01S5/04H01S3/30H01S3/067G02B6/255
CPCH01S3/06754H01S3/094H01S3/094042H01S3/30H01S3/302H01S5/041G02B6/255H01S3/094003H01S3/10061H01S3/1003H01S3/1001H01S3/09415H01S3/094065H01S3/094069H01S3/06791Y02A90/10H01S3/08013H01S3/0804
Inventor 甘久林衡小波杨中民张智深
Owner SOUTH CHINA UNIV OF TECH
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