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Optical Fiber Communications 4th Edition by Gerd Keiser
Edition 4ISBN: 978-0073380711Optical Fiber Communications 4th Edition by Gerd Keiser
Edition 4ISBN: 978-0073380711 Exercise 4
To see the relative contributions of the various noise mechanisms in an optical amplifier, calculate the values of the five noise terms in Eq. (11.30) for operational gains of G = 20 dB and 30 dB. Assume the optical bandwidth is equal to the spontaneous emission bandwidth (30-nm spectral width) and use the following parameter values: 
( b ) To see the effect of using a narrowband optical filter at the receiver, let B o = 1.25 × 10 11 Hz (125 GHz at 1550 nm) and find the same five noise terms for G = 20 dB and 30 dB.
( b ) To see the effect of using a narrowband optical filter at the receiver, let B o = 1.25 × 10 11 Hz (125 GHz at 1550 nm) and find the same five noise terms for G = 20 dB and 30 dB.Explanation
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(a) Noise terms:
From Eq. (6.17), the th...
Optical Fiber Communications 4th Edition by Gerd Keiser
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