Airborne integrated air-cooled optical fiber cladding power stripper

Abstract

The invention discloses an airborne integrated air-cooled optical fiber cladding power stripper, which comprises a total reflection parabolic mirror and a laser full-absorption surface layer. The total reflection parabolic mirror is arranged in a fuselage; and the laser full-absorption surface layer and the fuselage skin are integrally formed. According to the invention, the cladding power stripper and the fuselage skin are integrally designed, and the design principle of a parabolic mirror is combined, and stray light is directly scattered to the inner wall of the cavity through a quartz glass tube, so that the surface heat flux density of stray light radiated to the inner wall absorption surface is greatly reduced; the generated waste heat is completely concentrated on the inner surfaceof the skin, then, is transferred to the outer surface and is subjected to real-time heat dissipation by utilizing an airborne environment natural cold source-high-altitude low-temperature high-speedairflow, so that a large amount of waste heat generated by stray light stripped from an optical fiber cladding can be efficiently dissipated in real time to meet the temperature control requirement ofthe cladding power stripper; and the cladding power stripper is simple in structure, the overall weight is greatly reduced, and the lightweight design requirement can be met.

Description

technical field [0001] The invention belongs to the technical field of fiber lasers, and in particular relates to an air-mounted integrated air-cooled fiber cladding power stripper. Background technique [0002] Due to its obvious advantages such as high beam quality, good stability, compact structure, and high conversion efficiency, fiber lasers have been widely used in advanced manufacturing, medical treatment, industrial processing, and military applications. more and more urgent. The double-clad fiber laser is beneficial to improve the laser output power and pump coupling efficiency, but its output light contains certain stray light, which will seriously affect the spectral characteristics and beam quality of the laser, and directly or indirectly affect the high power laser The reliability needs to be filtered out in time. Cladding power stripper (Cladding Power Stripper, referred to as CPS) is one of the important components in high-power double-clad fiber lasers. It ...

AI Technical Summary

Problems solved by technology

[0013] Disadvantage of the existing technical solution 1: using natural convection in the air to dissipate heat, the heat dissipation efficiency / effect is poor, and it is not suitable for situations where the air is thin and the laser power is high

[0014] Disadvantages of the existing technical solution 2: the heat dissipation effect of the indirect liquid-cooled CPS is poor, and the general stripping power is <300W, and is limited by the performance of the cold plate; although the heat dissipation efficiency of the direct liquid-cooled CPS is greatly enhanced compared with the indirect liquid-cooled type, the Both adopt the form of active thermal control. The entire cooling system contains many pump valve components, pipelines, etc. The system is more complicated, and the volume and weight required are greatly increased.

[0015] The third disadvantage of the existing technical solution: the phase change thermal storage type CPS only uses the phase change material to absorb and temporarily store the waste heat when it is working, and it still needs an additional cooling system to dissipate the waste heat (for example, it is still possible to use pump valve components, etc. Cooling), in addition, phase change heat storage CPS generally needs to store cold and keep warm the phase change material before and after use, the cold storage time is generally long, and the use scenarios are limited

[0018] Existing technical solution 2: Both the indirect liquid-cooled and direct liquid-cooled CPS adopt the form of active thermal control. The cooling system usually includes many pump valve components, pipelines, etc., and the system is relatively complicated, resulting in a large increase in overall volume and weight. , not conducive to lightweight design

[0019] Existing technical solution 3: The phase change heat storage type CPS uses the phase change latent heat of the phase change material to temporarily store the waste heat generated during the operation of the CPS, and the heat release process (such as when applied in an airborne environment) still requires additional The cooling system dissipates waste heat, resulting in an increase in additional volume and weight; in addition, in order to make full use of the phase change latent heat of phase change materials, it is necessary to fully consider the phase change temperature point to select phase change materials, resulting in the need for phase change before and after use. The variable material is fully stored and kept warm, and the working interval of CPS may be longer

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