Estimate the temporal spread of an impulse in a single-mode optical fiber communication system with a fiber length of 40 km. Given that the dispersion parameter of the fiber is 25 ps/km-nm and the linewidth of the source (channel wavelength) is 0.1 nm. 100 ns 10 ns 1 ns 0.1 ns
Question
Estimate the temporal spread of an impulse in a single-mode optical fiber communication system with a fiber length of 40 km. Given that the dispersion parameter of the fiber is 25 ps/km-nm and the linewidth of the source (channel wavelength) is 0.1 nm. 100 ns 10 ns 1 ns 0.1 ns
Solution
The temporal spread of an impulse in a single-mode optical fiber communication system can be estimated using the formula:
Temporal Spread = Dispersion Parameter * Linewidth of Source * Fiber Length
Given:
- Dispersion Parameter = 25 ps/km-nm
- Linewidth of Source = 0.1 nm
- Fiber Length = 40 km
Substituting these values into the formula:
Temporal Spread = 25 ps/km-nm * 0.1 nm * 40 km = 100 ps
Since 1 ns = 1000 ps, the temporal spread is 0.1 ns.
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