Example • Consider a light source emitting at a wavelength of 1550 nm and driven by an information signal at the bit rat

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Example Consider A Light Source Emitting At A Wavelength Of 1550 Nm And Driven By An Information Signal At The Bit Rat 1 (45.89 KiB) Viewed 28 times

Example • Consider a light source emitting at a wavelength of 1550 nm and driven by an information signal at the bit rate of 2.5 Gbps, which launches a Gaussian pulse, S,(t), with pulse width T = 100 ps. The fiber group-velocity dispersion coefficient is D = 16 ps/(nm.km). Recall the relation between D and. • Find dispersion length, Lp. (Answer: 500 km) • Find Normalized propagation distance, LN (Answer LN = 2) and propagation distance, L (answer L = 1000 km) • Deduce the pulse spreading condition of the transmit pulse with regard to the system performance (Answer: We deduce that after propagating 100 km, each pulse is spread significantly over more than three symbols period, and thus interferes with two adjacent pulses and therefore degrading the system performance.)