Preparation device and method of surface gradient scattering cladding optical power stripper

Abstract

The disclosure provides a surface gradient scattering type clad optical power stripper manufacturing device and method. The manufacturing device comprises a reaction tube, a holder, an injection holeand a flow meter; the bottom of the reaction tube is provided with a connecting hole, and a fiber to be corroded passes through the connecting hole and is hermetically connected with the bottom of thereaction tube; the fiber to be corroded is connected to the holder; the injection hole is formed in the reaction tube; a container containing a corrosive liquid is connected to the injection hole through a pipeline, the corrosive liquid is injected into the reaction tube, and the flow meter is further arranged on the pipeline. According to the gradient corrosion device, the corrosion time for a clad surface continuously increases in the axial direction of the fiber to be corroded and in the laser transmission direction, and the density of crystal particles corresponding to the clad surface gradually increases, thereby achieving the effect of gradually increasing the clad light scattering rate.

Description

technical field [0001] The present disclosure relates to the field of fiber laser technology, in particular to a preparation device and method for a surface gradient scattering cladding optical power stripper. Background technique [0002] Cladding pumping technology achieves kilowatt-level fiber laser output. But the residual pump light at the end of the output stage of the laser amplifier degrades the output beam quality of the fiber laser. What's more serious is that when the residual pump light is transmitted between adjacent power stages, it will generate additional heat load on the passive devices between adjacent power stages in the laser system, which will endanger the stable operation of passive devices. In addition, high-power fiber lasers are widely used in the field of laser processing. When the fiber laser acts on the surface of the material to be processed, a large amount of scattered light on the surface of the material will be coupled into the inner claddin...

AI Technical Summary

Problems solved by technology

The uniform corrosion structure design is often used in the peeling area, and its defect is that it cannot take into account the temperature rise uniformity and power attenuation performance of the device

When the corrosion time is too long and the density of scattering crystal particles on the surface of the optical fiber is high, although high power attenuation performance can be achieved, the cladding light will leak a large amount in a very short distance, which is prone to local thermal effects and the temperature rise of the device surface severe

When the corrosion time is too short and the density of scattering crystal particles on the surface of the fiber is small, the cladding light is slowly filtered out along the axial direction of the stripping zone. Although the temperature rise of the device is reduced, the filtered power is greatly reduced at the same length

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