CHARACTERISTICS OF OPTICAL HIBERS 97 11. Find the material dispersion and the waveguide dispersion over 6 km of the 17. If the input of Problem 15 Is 8 dBm, what single-mode fiber at 1550 nm. The source Is the output power in dum? Ninewidth is 30 nm. 18. At the end of a 10-km single-mode fiber, 12. Find the total dispersion for Problem 11. the sensitivity of the receiver Is -12 dem. What is the minimum fiber Input (in 13. The polarization mode dispersion milliwatts) allowable for this system? coefficient for a single-mode fiber is 0.4 19. What length of 50-um multimode fiber ps/ vkm. Find the polarization mode could be used for the same power levels dispersion over 10 km of this fiber. of Problem 187 14. Find the attenuator or loss after 6 km of a 20. A 10-km 62.5-um multimode fiber has single-mode fiber and 6 km of a 50-um an input of 4 mW at 850 nm. Change the multimode fiber at 1310 nm. fiber attenuateon in dB to fractional 15. What length of 62.5-um multimode fiber transmittance and find the output power can be used before the attenuateon drops in milliwatts. Repeat the problem using to 20 dB? decibels. 16. Find the percent transmission over the fibers of Problem 14