Efficient HoYLF Laser Pumped by Tunable Tm-Doped Fiber Laser

Fei, 王飞 Wang; Deyuan, 沈德元 Shen; Dianyuan, 范滇元 Fan; Qisheng, 陆启生 Lu

doi:10.3788/cjl20093607.1727

Cited by 2 publications

(1 citation statement)

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“…Among them, the carbon fiber composite material is made of carbon fiber unidirectional strip alternating layer-braided at a certain Angle, and the thermal expansion coefficient in one direction is negative, which can obtain a thermal expansion coefficient of less than 10 -5 order, making up for the shortcomings of high reflective surface expansion coefficient of pure metal materials. The microwave imager antenna of Fengyun 3 weather satellite and the multimode microwave radiometer antenna of Shenzhou 4 spacecraft are all made of such materials [1][2][3][4][5][6] 。 At present, there are many researches on the effect of wide-area laser on carbon fiber composites at home and abroad, including the coupling law of laser and carbon fiber composites, the ablation experiment and theoretical modeling of carbon fiber composites, and the processing of carbon fiber composites by laser. However, there are few studies on the anti-laser irradiation effect of the sandwich structure composed of carbon fiber composite materials [7][8][9][10] .…”

Section: Introductionmentioning

confidence: 99%

Damage characteristics of carbon fiber composite sandwich structure under laser irradiation

DING,

Fu,

et al. 2023

Third International Computing Imaging Conference (CITA 2023)

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In the simulated vacuum environment of low-temperature and low-pressure, a continuous laser irradiation effect experiment of 1070 nm was carried out on a carbon fiber composite sandwich structure with white paint on the surface of the reflector antenna using a fiber laser as the light source and the morphology characteristics of sandwich structures under different laser loading conditions were obtained. The transient temperature field on the surface of the sandwich was measured by a high temperature infrared imager, and the surface temperature rise of the sandwich was obtained by thermocouple. The relationship between temperature and damage morphology of structural materials was obtained by analyzing the changes of surface temperature field and morphology during laser irradiation. The mechanism of laser action on the sandwich structure of carbon fiber composite and the influence of laser parameters on the morphology of structural materials were studied. The results show that under laser irradiation with a laser power density of about 20 W/cm2, the white paint sprayed on the surface of the front skin first ablates and falls off. As the temperature rises, the resin base of the carbon fiber composite is pyrolyzed, the carbon fiber spallation occurs, the front skin loses its mechanical properties, the rubber film is pyrolyzed, the front skin is separated from the aluminum honeycomb, and the back skin expands and deforms under the action of pyrolysis gas.

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