论文部分内容阅读
一、剖析氢气造成光缆损耗的根源 为了严格保证—九光缆工程所用光缆的质量,对该工程的48芯GYTA,GYTY53,GYTA33型光缆进行了质量监测,发现部分光缆有衰减增大的迹象,在1.3μm的波长段不明显,而在l.55μm的波长段衰减变化较为明显。这引起了学者专家们的密切关注。根据综合测试分析,并做了浸入缆膏的热老化试验及减小应力,折氢量等项试验测试。确定为氢分子振动扩散到光纤的二氧化硅网状中的间隙引起了衰减的增加。由于光纤芯区产生氢分子吸收峰,在l.24μm和1.59μm两个氢峰使得光纤在1.3μm和1.5μm波长损耗增加,在1.55μm段损耗增加尤为明显。从而可知,真正引起光损耗增加的杀手是氢气。
First, the analysis of the root cause of cable loss caused by hydrogen In order to strictly ensure the quality of optical cable used in nine optical cable project, the quality monitoring of the 48-core GYTA, GYTY53 and GYTA33 optical fiber cables of the project was carried out and found that some optical cables showed signs of attenuation increasing. 1.3μm wavelength band is not obvious, but in the l.55μm wavelength attenuation changes more obvious. This aroused the close attention of scholars and experts. According to the comprehensive test analysis, and made a dip immersion cable heat aging test and reduce the stress, the amount of hydrogen test and other tests. The gap identified as the hydrogen molecule vibrating diffused into the silica network of the optical fiber caused an increase in attenuation. Because of the absorption peak of hydrogen molecule in the core region of the fiber, the two hydrogen peaks at l.24μm and 1.59μm increase the loss of the fiber at the wavelength of 1.3μm and 1.5μm, especially at 1.55μm. Thus, the killer that actually causes the increase of light loss is hydrogen.