CAJ | 학술논문

基于动态热传导方程,对高功率双包层光纤激光器的热效应进行了数值模拟,研究了高功率双包层光纤激光器内部温度场的空间及时间特性.计算表明,对于芯径为15 μm的光纤,开启泵浦光后约20 s光纤温度达到稳定值,关闭泵浦光后约20 s光纤冷却到室温,如采用脉冲泵浦,温度分布将随时间变化,波动频率与泵浦频率相同,泵浦频率越高波动越小,越接近相同平均功率的连续泵浦.
기우동태열전도방정,대고공솔쌍포층광섬격광기적열효응진행료수치모의,연구료고공솔쌍포층광섬격광기내부온도장적공간급시간특성.계산표명,대우심경위15 μm적광섬,개계빙포광후약20 s광섬온도체도은정치,관폐빙포광후약20 s광섬냉각도실온,여채용맥충빙포,온도분포장수시간변화,파동빈솔여빙포빈솔상동,빙포빈솔월고파동월소,월접근상동평균공솔적련속빙포.
According to the heat conduction equation,the temperature distribution in high power double-clad fiber laser (DCFL) was analyzed. The dynamic characteristics of the temperature in the core was discussed. For the fiber with core radius of 15 μm, the computation indicates that the temperature reaches the maximum after opening the pump light for about 20 seconds. Shut down the pump light for about 20 seconds, the fiber will be cooled down to the room temperature. If pumping with pulse light, the temperature will fluctuate at the same frequency with the pulse. The higher the frequency is, the smaller the fluctuate is,the more similar with the continuous pump.