Optical Fiber Communications 4th Edition by Gerd Keiser

Exercise 11

Three 5-km-long fibers have been spliced together in series and an OTDR is used to measure the attenuation of the resultant fiber. The reduced data of the OTDR display is shown in Fig. 14.39. What are the attenuations in decibels per kilometer of the three individual fibers What are the splice losses in decibels What are some possible reasons for the large splice loss occurring between the second and third fibers