Optical fiber mold stripper and method for manufacturing optical fiber mold stripper

Abstract

The invention discloses an optical fiber mode stripper. The optical fiber mode stripper comprises an input end, an output end and an attenuation area. The input end comprises a first fiber core, a first inner cladding layer and a first outer cladding layer. The output end comprises a second fiber core, a second inner cladding layer and a second outer cladding layer. The attenuation area comprises a third fiber core and a third inner cladding layer. The third fiber core is connected between the first fiber core and the second fiber core, and the third inner cladding layer is connected between the first inner cladding layer and the second inner cladding layer and exposed between the first outer cladding layer and the second outer cladding layer. A plurality of grooves are formed in the third inner cladding layer and formed by extending along the circumferential direction of the third inner cladding layer. The invention further discloses a manufacturing method of the optical fiber mode stripper. The optical fiber mode stripper has the advantages that pump light output by an optical fiber laser device can be attenuated effectively, transmitting quality of the laser in an optical fiber is improved, output power of the optical fiber laser device is increased, and output quality of the optical fiber laser device is improved.

Description

technical field

[0001] The invention relates to the field of fiber lasers, in particular to an optical fiber mold stripper and a manufacturing method of the optical fiber mold stripper. Background technique

[0002] Fiber lasers are all made of double-clad fibers. The pump light is mainly transmitted in the inner cladding, and is coupled to the core during transmission to be absorbed and form a new laser in the core. In this pump mode, the attenuation of the pump light in the fiber is an exponential mode. When the pump light attenuates to a certain extent, increasing the fiber length not only cannot effectively improve the output power of the fiber laser, but also increases the cost. Therefore, there is an optimal value for the length selection of the active fiber, but the limited length of the active fiber means that part of the pump light cannot be absorbed and becomes useless light. If this part of useless pump light continues to propagate in the optical fiber, it will d...

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