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Dual-wavelength tunable thulium-doped fiber laser

A fiber laser, dual-wavelength technology, used in lasers, laser parts, phonon exciters, etc., can solve problems such as single wavelength, and achieve the effects of low insertion loss, high efficiency and simple design

Active Publication Date: 2010-10-13
XUZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the lasers using VBG reported so far only achieve a single wavelength output.

Method used

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  • Dual-wavelength tunable thulium-doped fiber laser
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  • Dual-wavelength tunable thulium-doped fiber laser

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Embodiment Construction

[0011] like figure 1 As shown, the dual-wavelength tunable thulium-doped fiber laser consists of a first pump source 1, a second pump source 2, a first pump light focusing lens 3, a second pump light focusing lens 4, and a first dichroic mirror 5 , second dichroic mirror 6, thulium-doped optical fiber 7, laser collimating lens 8 at output end, laser collimating lens 9 at feedback end, first reflective volume Bragg grating (VBG1) 10, second reflective volume Bragg grating (VBG2 ) 11 and a broadband dielectric film high reflection mirror 12. The first pumping light focusing lens 3, the first dichroic mirror 5, the thulium-doped optical fiber 7, the second dichroic mirror 6, the second pumping light focusing lens 4 and the first pumping light focusing lens 4 are sequentially placed on the horizontal optical path of the first pumping source 1. Two pumping sources 2; an output end laser collimator lens 8 is placed on the vertical optical path facing the first dichroic mirror 5; a ...

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Abstract

The invention discloses a dual-wavelength tunable thulium-doped fiber laser, belonging to the laser technical field. The fiber laser is composed of a pumping source, a thulium-doped fiber, a pump light focusing lens, a dichroic mirror, a laser collimation lens, two reflection volume Bragg gratings (VBG) and a broadband dielectric film high-reflective mirror. In the invention, two VBGs are taken as reflecting elements with tuning cavity end surfaces so that the reflection wavelengths corresponding to the two VBGs can oscillate simultaneously; and by adopting the characteristic of the two VBGs that the reflection wavelengths can be tuned with angles, the two vibrating wavelengths can be individually and respectively tuned within the range of dozens of nanometers, and the size of the tuning range is related to design parameters of the VBGs. The dual-wavelength tunable thulium-doped fiber laser has the beneficial effects of being applicable to high-power operation, and being capable of updating into a laser system with simultaneous multi-wavelength output.

Description

technical field [0001] The invention relates to a dual-wavelength tunable fiber laser, in particular to a dual-wavelength tunable thulium-doped fiber laser. Its thulium-doped fiber laser starts to oscillate at the same time with two wavelengths, and the distance between the two wavelengths can be tuned. The invention is applicable to the dual-wavelength tunable operation of optical fiber, solid state and other types of lasers. Background technique [0002] Due to their wide applications in interferometric rainbow holography, precision laser spectroscopy, lidar, nonlinear frequency conversion, terahertz difference frequency generation, and laser medicine, research on dual-wavelength lasers has attracted increasing attention. [0003] There are many ways to generate dual-wavelength output, such as using a combination of prisms or diffraction gratings and high-reflection mirrors in an optical resonant cavity to form multiple feedback channels with different wavelengths. Such ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067H01S3/1055H01S3/0941H01S3/00H01S3/081
Inventor 沈德元王飞陈浩赵婷杨晓芳
Owner XUZHOU NORMAL UNIVERSITY