前言在开展研制高带宽长波长(1.3μm)多模光纤工作的同时,开始进行了扫频法光纤基带测试系统的研究。在研制系统的过程中,由于激光器和1GHz以上的宽带放大器等元件目前国内供应尚有困难,因而进口了1.3μm的E/O和O/E转换器,加快了该项工作的进度。我们于83年底至84年元月初,对频域测试中的多种方案进行了试验比较,从中选择了适用于光纤常规测试的方案,并加 Preface In the development of high-bandwidth long-wavelength (1.3μm) multimode fiber work at the same time, began the swept-frequency fiber baseband test system. In the development of the system, due to the current domestic supply of lasers and broadband amplifiers above 1GHz and other components are still difficult, so imported 1.3μm E / O and O / E converter to speed up the progress of the work. From the end of 83 to early January of 1984, we compared and tested a number of schemes in frequency domain testing. We chose a scheme suitable for routine testing of optical fibers and added