论文部分内容阅读
光耦合器的结构主要有对接型和光纤传输型两类。两者不同点是:利用石英光纤来传输GaAs发光管发出光能,石英光纤在0.85μm附近传输损耗极小(2dB/km),在短距离传输中可认为信号衰减为零,且可使输入与输出部分保持足够大距离,避免对接型光耦合器抗干扰能力及耐压差的缺点。发光管发射角较大,而通用光纤芯径60μm左右,耦合效率就低,
The main structure of the optical coupler docking type and optical transmission type two. The difference between the two is: the use of quartz optical fiber to send light GaAs LED, quartz fiber transmission loss in the vicinity of 0.85μm minimum (2dB / km), in short-term transmission can be considered signal attenuation is zero, and can make the input And the output part to maintain a sufficient distance to avoid docking optical coupler anti-interference ability and pressure tolerance shortcomings. LED emission angle larger, and general-purpose fiber core diameter of about 60μm, the coupling efficiency is low,