一种制作大芯径光纤的新工艺

New technique to make optical fiber with large core

与传统的大芯径光纤不同,纯石英芯掺氟玻璃包层光纤是一种新结构的大芯径光纤,主要用于光能传输和传感。在国外这种光纤是采用POD(等离子体外相沉积)技术生产的,由于目前国内没有这种设备,本文采用管棒套装技术,即PCVD(等离子体化学气相沉积)工艺制作掺氟石英管,MCVD(改进的化学气相沉积)工艺在高温条件下把石英芯棒和掺氟石英管熔融烧结在一起,制成了与国外采用POD工艺生产的相同类型的光纤,经测试和使用表明,与国外的产品性能相差不大。

Different from the optical fiber with large core made with traditional technique,optical fiber with large pure quartz core and Fluorine-doped glass cladding is a new structure of large core fiber,it is used mainly in the fields of light energy transfer and light sensing.It is made by POD（plasma outside deposition）technique abroad.As we don′t have the equipments in domestic,we creatively used the rod in tube method to do that,i.e use PCVD（plasma chemical vapor deposition）technique to make F-doped quartz tube,and jacketed a pure quartz rod as the fiber core inside the F-doped quartz tube to form the fiber with the same structure as that from POD technique in high temperature condition by MCVD（modified chemical vapor deposition）technique.Measurements and results show that our products have the same performance with those made abroad.