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Optical fiber laser and optical fiber end cap generating indication light

A fiber laser and fiber end technology, applied in the field of lasers, can solve the problems of not being able to see the visible light indicator, indicating that the light source cannot work with the fiber laser at the same time, and burning out the indicator light source, etc.

Pending Publication Date: 2020-08-11
SHENZHEN SUNSHINE LASER & ELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Conventional fiber lasers have an indicator light source at the back end of the laser; however, when the fiber laser is working, the indicator light source usually needs to be turned off to avoid the reverse leakage of the fiber laser from burning the indicator light source, so the indicator light source cannot work with the fiber laser at the same time
Therefore, when the fiber laser is working, the visible light indicator cannot be seen by the naked eye

Method used

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  • Optical fiber laser and optical fiber end cap generating indication light
  • Optical fiber laser and optical fiber end cap generating indication light
  • Optical fiber laser and optical fiber end cap generating indication light

Examples

Experimental program
Comparison scheme
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no. 1 example

[0030] refer to figure 1 , this embodiment provides a fiber laser, which includes a laser light source 1 , an optical fiber 2 and a fiber end cap 3 .

[0031] The fiber end cap 3 is a fiber end cap for self-generated indicating light, specifically a fiber end cap for self-generated indicating light of a fiber laser.

[0032] refer to figure 2 , the fiber end cap 3 includes a first crystal 31 . The first crystal 31 is a frequency conversion crystal 31A; wherein, the frequency conversion crystal 31A is also called a frequency doubling crystal. Specific forms of the frequency conversion crystal 31A include potassium titanyl phosphate (KTiOPO4, KTP for short) frequency conversion crystal and periodically poled lithium niobate (Periodically Poled Lithium Niobate, PPLN for short) frequency conversion crystal.

[0033] refer to figure 1 and figure 2 . The fiber end cap 3 is connected to the fiber 2 to transmit the light emitted by the laser light source 1 . Specifically, one...

no. 2 example

[0037] refer to image 3 The difference between this embodiment and the first embodiment is that: the fiber laser of this embodiment further includes a fiber cladding light stripper 4 .

[0038] Fiber 2 has a fiber coating; specifically, see Figure 5 , the optical fiber 2 includes an optical fiber cladding 201 and a fiber core 202 . The fiber cladding 201 wraps the fiber core 202 .

[0039] refer to image 3 , the optical fiber cladding light stripper 4 is arranged between the laser light source 1 and the fiber end cap 3, to guide the light in the fiber cladding 201 of the optical fiber 2 from the fiber cladding 201, so that only the light transmitted through the fiber core 202 The light is incident on the frequency conversion crystal 31A.

[0040] Specifically, for the energy-transmitting optical fiber, that is, the optical fiber 2 near the laser output end (that is, the optical fiber output end 21), a section of treatment is performed on the optical fiber 2 to remove th...

no. 3 example

[0042] refer to Figure 4 The difference between this embodiment and the first embodiment is that: the fiber end cap 3 of the self-generated indicating light of this embodiment further includes a connecting portion 32 .

[0043]One end of the connection part 32 is connected to the frequency conversion crystal 31A. The other end of the connection part 32 is connected to the fiber output end 21 of the optical fiber 2 ; that is, the connection part 32 connects the frequency conversion crystal 31A to the fiber output end 21 of the optical fiber 2 . Wherein, the connecting part 32 may be a coreless optical fiber.

[0044] When the fiber laser in the embodiment of the present invention is working, it can simultaneously provide working light (the light emitted by the laser light source 1 for processing) and visible indicator light visible to the naked eye, and can reduce the influence on the laser power density.

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PUM

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Abstract

The embodiment of the invention discloses an optical fiber laser and an optical fiber end cap capable of generating indication light. The optical fiber end cap is used for being connected to an optical fiber so as to transmit light emitted by the laser light source. The optical fiber end cap comprises a first crystal which is a frequency conversion crystal. A part of light emitted by the laser light source is subjected to frequency doubling through the frequency conversion crystal to become visible indication light; and the visible indication light is coaxial with the light emitted by the laser light source. The optical fiber laser comprises a laser light source, an optical fiber and the optical fiber end cap. According to the embodiment of the invention, the fiber laser can carry the indication light for processing, and the influence on the laser power density can be reduced.

Description

technical field [0001] The invention relates to the technical field of lasers, in particular to a fiber laser and a fiber end cap for self-generated indicating light. Background technique [0002] Fiber lasers generate laser light in the core of an optical fiber, with a core diameter typically between 10μm and 30μm and an output power between 100W and 5000W. Due to the high power density of the fiber core, in actual use of fiber lasers, a quartz column is usually fused at the output end of the fiber as an output end cap. The conventional output end cap is made of quartz material. After the laser emerges from the fiber core, it diverges and propagates in the end cap, and exits from the output surface of the end cap. The laser cross section has been enlarged, which reduces the laser power density. [0003] Conventional fiber lasers have an indicator light source at the back end of the laser; however, when the fiber laser is working, the indicator light source usually needs to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067H01S3/109G02F1/355G02F1/37
CPCH01S3/06708H01S3/109G02F1/3551G02F1/37
Inventor 马建立王东
Owner SHENZHEN SUNSHINE LASER & ELECTRONICS TECH CO LTD