Optical Fiber Communications 4th Edition by Gerd Keiser

Exercise 2

Make a graphical comparison, as in Fig. 8.4, and a spreadsheet calculation of the maximum attenuation-limited transmission distance of the following two systems operating at 100 Mb/s:
System 1 operating at 850 nm
( a ) GaAlAs laser diode: 0-dBm (1-mW) fiber-coupled power.
( b ) Silicon avalanche photodiode: -50-dBm sensitivity.
( c ) Graded-index fiber: 3.5-dB/km attenuation at 850 nm.
( d ) Connector loss: 1 dB/connector.
System 2 operating at 1300 nm
( a ) InGaAsP LED: -13-dBm fiber-coupled power.
( b ) InGaAs pin photodiode: -38-dBm sensitivity.
( c ) Graded-index fiber: 1.5-dB/km attenuation at 1300 nm.
( d ) Connector loss: 1 dB/connector.
Allow a 6-dB system operating margin in each case.