光纤熔接部位抗拉强度的改善

Improvement of Tensile Strength of Optical Fiber Fusion Position

由于光纤经切割再熔接后,其熔接部位的抗拉强度明显低于完好的光纤,因此常常导致光纤激光器在光纤熔接处发生折断。通过对光纤熔接部位断裂原理的分析,对直径125μm、220μm双包层光纤熔接部位抗拉强度的试验研究,提出了采用扫描加热处理方法,以提高光纤熔接部位的抗拉强度。试验证明:在抗拉强度不足100kpsi(0.69GPa)的光纤熔接部位,使用二氧化碳激光熔接设备,采用扫描加热处理法对光纤熔接部位进行裂纹修复,裸光纤熔接部位的抗拉强度得到了明显的提高,达到160kpsi(1.10GPa)以上。

After cutting and remelting,the tensile strength of the fusion part of the fiber is obviously lower than that of the intact fiber,which often leads to the fracture of the fiber laser at the fusion part of the fiber.Based on the analysis of the fracture principle of the optical fiber fusion position and the experimental study on the tensile strength of the fusion position of the double clad optical fiber with diameter of 125μm and 220μm,the scanning heating method is proposed to improve the tensile strength of the optical fiber fusion position.The test results show that the tensile strength of the fusion part of the optical fiber with the tensile strength less than 100 kpsi(0.69 GPa)is significantly improved,reaching more than 160 kpsi(1.10 GPa)by using the CO2 laser fusion equipment and using the scanning heating method to repair the cracks in the fusion part of the optical fiber.