石英光纤在1.3μm波长处的损耗低达0.5dB/km,色散几乎为零。因此,工程实用系统广泛采用1.3μm波长的光纤传输系统。在可用的光源器件中,1.3μm面发光管是一种高可靠性、低成本的实用器件,能满足中、短距离光纤通信的要求。使用这种器件已建成了工作速率为274Mb/s、无中继传输距离8公里和400Mb/s、5公里的梯度多模光纤通信系统。近年来,具有1～2Gb/s超高速调制能力的面发光1.3 Quartz fiber loss in the 1.3μm wavelength as low as 0.5dB / km, dispersion is almost zero. Therefore, engineering and practical systems widely used 1.3μm wavelength optical fiber transmission system. Among the available light source devices, the 1.3-μm surface-emitting tube is a high-reliability, low-cost, practical device that meets the requirements of medium- and short-distance optical fiber communication. With this device, a multimode optical fiber communication system with a working speed of 274Mb / s, repeater transmission distance of 8km and 400Mb / s, 5km has been built. In recent years, with 1 ~ 2Gb / s ultra-high speed modulation surface emitting 1.3