Which parameter describes how a signal spreads in time as it travels through fiber?

Study for the BICSI OSP Design Test. Prepare using multiple choice questions, with hints and explanations to enhance understanding. Succeed in your exam journey!

Dispersion describes how a signal spreads in time as it travels through fiber. Different spectral components of a pulse propagate at different speeds in the fiber, due to material and waveguide properties. As the pulse travels, these components accumulate different delays, causing the pulse to broaden in time. This temporal spreading can cause adjacent pulses to overlap, reducing the ability to distinguish bits at high data rates. Bandwidth is about the range of frequencies that can be transmitted and affects data rate, but it doesn’t describe time spreading of a pulse. Attenuation is the loss of signal power with distance, not pulse widening. Return loss relates to reflections from discontinuities, not how the pulse broadens over time. So dispersion is the parameter that captures how a signal spreads in time through fiber.