Anti-Gaussian energy transmission optical fiber and application thereof

Abstract

The invention discloses an anti-Gaussian energy transmission optical fiber and application thereof. The anti-Gaussian energy transmission optical fiber comprises a plurality of concentrically nested independent transmission waveguide structures; the waveguide structure comprises an inner layer and an outer layer, and the refractive index of the inner layer is larger than that of the outer layer; the radial refractive index distribution of the inner layer is sunken; the optical power is distributed in the inner layer of the waveguide structure to form inverse Gaussian light. The method is used for manufacturing an all-in-one energy transfer type beam combiner or an adjustable mode beam laser. According to the anti-Gaussian type energy transmission optical fiber, the refractive index distribution concave design is adopted in the inner layer of the waveguide structure with optical power distribution, a certain homogenization effect is achieved, and the anti-Gaussian type energy transmission optical fiber is combined with the multiple concentrically-nested independent transmission waveguide structures to form anti-Gaussian light spots, so that the optical fiber has higher accumulated transmission and more uniform power capacity.

Description

technical field [0001] The invention belongs to the field of special optical fibers, and more specifically relates to an energy-transmitting optical fiber used for processing adjustable beams in optical fiber lasers. Background technique [0002] Energy transmission fiber is also called energy transmission fiber. Compared with the low loss, few modes, low power, and long-distance transmission pursued by traditional communication fibers, the energy transmission fiber requires large core diameter, high power, and short-distance energy transmission. Strictly speaking, an optical fiber capable of transmitting higher laser energy can be called an energy-transmitting optical fiber, so it is usually used in laser-related industries. [0003] Laser cutting and welding is an efficient and precise material processing method that uses a high-energy-density laser beam as a heat source. With the further development of laser technology, the quality, efficiency and operating costs of high...

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Problems solved by technology

[0008] In view of the above defects or improvement needs of the prior art, the present invention provides an anti-Gaussian energy-transmitting optical fiber, its application and a fiber laser. The optical waveguide forms a higher-power anti-Gaussian spot, thereby solving the technical problems of energy-concentration and excessive local temperature rise of the energy-transmitting optical fiber that forms a Gaussian spot at high power

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