Fiber End Caps and Fiber Lasers

Abstract

An optical fiber end cap and an optical fiber laser relate to the technical field of lasers. The fiber end cap includes an end cap body and an ion-doped region located in the end cap body, the light incident side of the end cap body is used for fusion splicing with the output end of the energy transmission fiber of the fiber laser; the beam emitted from the energy transmission fiber enters the end cap In the body, the transmission path of the light beam can be changed through the ion-doped region. The fiber laser includes the above-mentioned fiber end cap. The optical fiber end cap can change the refractive index of the end cap body, so that the light beam can output a light beam with specific optical characteristics after passing through the end cap body.

Description

technical field

[0001] The invention relates to the technical field of lasers, in particular to an optical fiber end cap and an optical fiber laser. Background technique

[0002] High-power fiber lasers have broad application prospects in industrial processing, medical treatment, national defense and other technical fields due to their high efficiency, high stability, high beam quality, long life, and easy expansion to high power. Because high-power fiber lasers usually use double-clad fiber technology, their cores are generally small, so the power density at the output end of high-power fiber lasers is high, and small end-face contamination or processing defects will cause damage to the end face of the fiber.

[0003] In order to reduce the power density at the output end of the fiber, the most commonly used solution at present is to weld a fiber end cap on the end face of the energy-transmitting fiber of the fiber laser. At present, the design feature of the fiber end cap...

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