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Integrated high power beam combiner

A beam combiner and high-power technology, which is applied in the field of fiber laser and high-power beam combiner devices, can solve the problems of increasing the volume and loss of fiber lasers, and achieve the effects of commercial production, high reliability and high integration

Inactive Publication Date: 2019-01-18
CHINA WEAPON EQUIP RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the actual combination application process of beam combining devices, the devices need to be welded to each other. The melting point not only increases the loss, but also needs to be protected when each melting point passes through the light, which will increase the volume of the fiber laser in practical applications.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0026] Integrated high power beam combiner for pump coupling of high power fiber lasers. Such as figure 1 shown.

[0027] Beam combiner A selects 4×1 beam combiner, a total of 7, the input fiber is 105 / 125μm single-clad fiber, the numerical aperture NA. is 0.15, and the output fiber diameter is 200 / 220μm single-clad Optical fiber, the numerical aperture NA. is 0.22, the withstand power of a single arm is not lower than 100W, and the transmittance is not lower than 97%.

[0028] The beam combiner B is a 7×1 beam combiner, the input fiber is the same as the output fiber of the beam combiner A, the fiber diameter is 200 / 220 μm, the numerical aperture NA. is 0.22, and the single-arm transmittance is not less than 95%.

[0029] The output pigtail is a double-clad fiber with a diameter of 20 / 400μm and a numerical aperture NA. of 0.06 / 0.46.

[0030] It is used for the coupling of 915nm or 975nm wavelength semiconductor lasers. The output power of each semiconductor laser is calcul...

Embodiment 2

[0032] Integrated High Power Combiner for Pump Coupling of High Power Fiber Amplifiers

[0033] Beam combiner A selects 7×1 beam combiner, a total of 6, the input fiber is 105 / 125μm single-clad fiber, the numerical aperture NA. is 0.15, and the output fiber diameter is 220 / 242μm single-clad Layer fiber, the numerical aperture NA. is 0.22, the withstand power of a single arm is not less than 100W, and the transmittance is not less than 92%.

[0034] Beam combiner B is a (6+1)×1 type beam combiner, the input fiber is the same as the output fiber of beam combiner A, the fiber diameter is 220 / 242μm, the numerical aperture NA. is 0.22, and the single-arm transmittance is not less than 95%.

[0035] The output pigtail is a double-clad fiber with a diameter of 20 / 400μm and a numerical aperture NA. of 0.06 / 0.46.

[0036] It is used for the coupling of 915nm or 975nm wavelength semiconductor lasers. The output power of each semiconductor laser is calculated as 100W, and the pump powe...

Embodiment 3

[0038] Integrated high power beam combiner for cascaded pumped high power fiber lasers

[0039] The beam combiner A is a 7×1 beam combiner, a total of 6, the input fiber is a 10 / 130μm double-clad fiber, the numerical aperture NA. is 0.06 / 0.46, and the output fiber diameter is 105 / 125μm , the numerical aperture NA. is 0.15, the single-arm withstand power is not lower than 200W, and the transmittance is not lower than 97%.

[0040] Beam combiner 2 is a (6+1)×1 type beam combiner, the input fiber is the same as the output fiber of beam combiner A, the fiber diameter is 105 / 125 μm, the numerical aperture NA. is 0.15, and the single-arm transmittance is not less than 95%.

[0041] The output pigtail is a double-clad fiber with a diameter of 30 / 250μm and a numerical aperture NA. of 0.06 / 0.46.

[0042] It is used for the injection of 1018nm fiber laser as a cascaded pump source. The output power of each 1018nm fiber laser is calculated as 200W, and the pump power of about 1358W can...

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Abstract

A high-power beam combiner is one of the necessary devices for high-power fiber lasers, and its performance affects the injection level of high-power fiber lasers. The invention discloses an integrated high-power beam combiner, which can be used for beam combining of high-power light sources under different conditions by preparing a plurality of beam combiners into a single device. The integratedhigh-power beam combiner of the invention reduces the number of melting points, reduces the length of the energy-transmitting optical fiber, and has the effect of alleviating the nonlinear effect to acertain extent. As the beam combiner of the invention is a single device, the fully enclosed waveguide transmits laser light, thus ensuring the consistency of a plurality of beam combiners as a whole, and improving the stability of a high-power fiber laser.

Description

technical field [0001] The invention belongs to the field of fiber lasers, in particular to the technical field of high-power beam combining devices. Background technique [0002] The high-power beam combiner is one of the necessary components for high-power fiber lasers, and its performance affects the pump injection level of high-power fiber lasers. The current commercial production of high-power beam combiners is a single device, and a device includes only one type of beam combiner. For example, a pump beam combiner can only realize pump light beam combining, such as 4×1, 7×1, etc. Model pump combiner, pump / signal combiner can only realize the combination of signal light and pump light, such as (6+1)×1, (18+1)×1 and other models of pump / signal combiner harness. However, in the development and production of actual fiber lasers, multiple beam combining devices need to be used in combination. Due to the limitation of the power of the pump source, the beam combining can be ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/10
CPCH01S3/10
Inventor 董超韩新丽刘杰王琦刘嘉巍谷亮张红郭胜刚李建婷杨宁朱超
Owner CHINA WEAPON EQUIP RES INST
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