衰减测量很可能是对光纤进行的最重要的测量。事实上,在大多数传输系统中,对扩大中继距离的主要限制是由光纤的衰减引起的。仅有的那些具有很高传输容量的系统也存在着带宽限制。然而,我们业已指出,在只增加衰减限制的情形下,能够对带宽限制作出多大的补偿。根据早先的所有考虑可以推断,为了以很高的精度可靠地测量衰减,测量时必须非 Decay measurement is probably the most important measurement of the fiber. In fact, in most transmission systems, the main limitation to increasing the relay distance is caused by the attenuation of the optical fiber. Only those systems with very high transmission capacity also have bandwidth limitations. However, we have already pointed out how much the bandwidth limit can be compensated for with only increasing the attenuation limit. Based on all earlier considerations, it can be concluded that in order to reliably measure the attenuation with high accuracy, the measurement must be non-