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Dual-wavelength pumped erbium-doped fluoride fiber laser and laser generating method

A fiber laser and pump laser technology, applied in the laser field, can solve the problems of long life, unfavorable inversion particle number, etc., and achieve the effect of increasing slope efficiency and output power

Active Publication Date: 2019-11-08
SHENZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the lower energy level of the mid-infrared laser transition of erbium ions in the 2.8 μm band 4 I 13 / 2 energy level 4 I 11 / 2 The long life is not conducive to maintaining a sufficient number of inversion particles during the laser emission process. When the number of particle inversions does not reach a certain level, the laser energy level transition will self-terminate

Method used

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  • Dual-wavelength pumped erbium-doped fluoride fiber laser and laser generating method
  • Dual-wavelength pumped erbium-doped fluoride fiber laser and laser generating method
  • Dual-wavelength pumped erbium-doped fluoride fiber laser and laser generating method

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Embodiment 1

[0051] A dual-wavelength pumped erbium-doped fluoride fiber laser, the fiber laser comprising:

[0052] Such as figure 2 As shown, 976nm pump laser 21, 1.610μm pump laser 22, beam combiner 23, first fiber Bragg grating 24, double-clad erbium-doped fluoride fiber 25, second fiber Bragg grating 26, cladding mode stripper 27. AlF 3 end cap 28.

[0053] The first Fiber Bragg Grating 24 and AlF 3 The end cap 28 together constitutes the optical resonant cavity of the 2.8 μm band fiber laser, and the laser light with a wavelength of 2.825 μm is produced by AlF 3 End cap 28 output.

[0054] The output wavelength of the pump laser 21 is 976nm, and the output wavelength of the pump laser 22 is 1610nm. After the two laser beams are combined by the beam combiner 23, they are respectively coupled into the inner cladding and core of the double-clad erbium-doped fluoride optical fiber 25. middle.

[0055] The inner cladding diameter of the double-clad erbium-doped fluoride optical fib...

Embodiment 2

[0061] A dual-wavelength pumped erbium-doped fluoride fiber laser, the fiber laser comprising:

[0062] Such as figure 2 As shown, 976nm pump laser 21, 1.613μm pump laser 22, beam combiner 23, first fiber Bragg grating 24, erbium-doped fluoride fiber 25, second fiber Bragg grating 26, cladding mode stripper 27, AlF 3 end cap 28.

[0063] The first Fiber Bragg Grating 24 and AlF 3 The end cap 28 together constitutes the optical resonant cavity of the 2.8 μm band fiber laser, and the laser light with a wavelength of 2.825 μm is produced by AlF 3 End cap 28 output.

[0064] The output wavelength of the pump laser 21 is 976 nm, and the output wavelength of the pump laser 22 is 1613 nm. The two laser beams are combined by the beam combiner 23 and then coupled into the double-clad erbium-doped fluoride fiber 25 .

[0065] The diameter of the inner cladding of the double-clad erbium-doped fluoride optical fiber 25 is 200 μm, and the diameter of the core of the double-clad erbium...

Embodiment 3

[0071] A dual-wavelength pumped erbium-doped fluoride fiber laser, the fiber laser comprising:

[0072] Such as figure 2 As shown, 976nm pump laser 21, 1.617μm pump laser 22, beam combiner 23, first fiber Bragg grating 24, erbium-doped fluoride fiber 25, second fiber Bragg grating 26, cladding mode stripper 27, AlF 3 end cap 28.

[0073] The first Fiber Bragg Grating 24 and AlF 3 The end caps 28 together constitute the optical resonant cavity of the 2.8 μm band fiber laser, and the generated 2.825 μm band laser is produced by AlF 3 End cap 28 output.

[0074] The output wavelength of the pump laser 21 is 976 nm, and the output wavelength of the pump laser 22 is 1617 nm. After the two laser beams are combined by the beam combiner 23, they are respectively coupled into the inner cladding of the double-clad erbium-doped fluoride optical fiber 25 and in the fiber core.

[0075] The inner cladding diameter of the double-clad erbium-doped fluoride optical fiber 25 is 250 μm, a...

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Abstract

The invention provides a dual-wavelength pumped erbium-doped fluoride fiber laser and a laser generating method. The fiber laser comprises a first pump laser, a second pump laser, a beam combiner, a first fiber Bragg grating, and a double-cladding erbium-doped fluoride fiber and an AlF3 end cap. The first pump light is coupled into the inner cladding of the double-cladding erbium-doped fluoride fiber, 2.8 mum laser radiation is formed between an erbium ion energy level <4>I<11 / 2> and an energy level <4>I<13 / 2>, the second pump light is coupled to the fiber core of the double-cladding erbium-doped fluoride fiber, excited erbium ions in the energy level <4>I<13 / 2> are pumped to an energy level <4>I<19 / 2>, heat rise of a laser caused by generation of 1.6 mum between energy levels <4>I<13 / 2> and <4>I<15 / 2> is suppressed while the number of erbium ions in the energy level <4>I<11 / 2> is increased, and the slope efficiency and the output power of the 2.8 mum laser radiation of the fiber laserare remarkably increased.

Description

technical field [0001] The invention belongs to the field of laser technology, and in particular relates to a dual-wavelength pumped erbium-doped fluoride fiber laser and a laser generating method. Background technique [0002] As a new type of laser, fiber laser has a series of significant advantages such as high conversion efficiency, good beam quality, good heat dissipation, and easy integration. In 2012, Nature Photonics magazine focused on the mid-infrared fiber laser technology, which promoted the further development of fiber lasers. Among them, the 3μm mid-infrared fiber laser has great application value and development prospects in the fields of biomedicine, environmental monitoring, communication and defense space photoelectric countermeasures. [0003] Currently, erbium-doped fluoride fiber lasers are one of the most promising high-power laser sources in the 3 μm wavelength range, which can be directly pumped by the most common laser diodes, typical single-wavelen...

Claims

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Application Information

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IPC IPC(8): H01S3/094H01S3/067
CPCH01S3/0675H01S3/094096
Inventor 刘军唐平华陈宇邓志象罗木林吴佳东
Owner SHENZHEN UNIV
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