自构建光纤链路的OTDR测试实验及教学实践

Test and measurement of self-built optical fiber links based on OTDR and its teaching practice

为了加深学生对光纤基础知识、光纤连接及测试基本理论的理解,提高学生的工程应用能力,浙江大学信息工程(光电)专业在"光通信及集成光电子技术模块实习"中设置了光纤链路测试实验,要求学生基于光纤、跳纤、尾纤、光纤端面处理工具、连接器、衰减器和熔接机等实验器材,通过机械对接、法兰及熔接方式自行构建光纤链路,并使用光时域反射计(optical time domain reflectometer,OTDR)进行测试,并对光纤端面质量、接续效果以及链路构建的合理性进行评估。2a来的教学实践表明,通过这种"基于任务,边做边学"的自主式、探究式实验,学生不仅能掌握OTDR的使用要点、光纤的端面处理及接续方法,而且学生发现问题和解答问题的能力也有所提高。

In order to enhance students＇ comprehension of the basics, connection and testing of optical fibers and improve their engineering application ability, an experiment of testing optical fiber links is included in ＂practical training and exercise of optical communication and integrated optoelectronic technology＂ set by Zhe-jiang University for the optical information engineering major. The students were required to build optical fiber links themselves by means of flange connection, mechanical splicing and fusion based on experimental equipment, such as fiber, jump fiber, tail fiber, fiber end preparation tools, fiber connector, attenuator, fiber fusion machine, etc. , then to measure with the optical time domain reflectometer （OTDR） and evaluate qualities of the fiber end and splicing as weIl as the rationality of fiber [inks. Tb.e teaching practice for two years shows that, through this kind of ＂task-oriented, learning by doing,＂ autonomous, exploratory experiments, the students can not only master the operation of OTDR, the end preparation and splicing of optical fibers, but also improve their abilities of finding problems from experimental phenomena, thinking, analyzing and then giving explanations.