Singlemode fiber has a smaller core than multimode fiber.

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Prepare for the Airstream Gate 5 Fiber Optic Test with comprehensive study materials including flashcards and multiple-choice questions, all equipped with hints and explanations. Ace your exam!

Multiple Choice

Singlemode fiber has a smaller core than multimode fiber.

Explanation:
Light travels through a fiber by modes, and the core size determines how many modes can propagate. Singlemode fiber uses a very small core, about 8–10 micrometers in diameter, which confines light to a single propagation path. This single-path design minimizes modal dispersion and supports high bandwidth over long distances. Multimode fiber, on the other hand, has a much larger core—roughly 50 micrometers to 62.5 micrometers—allowing many light paths to travel simultaneously, which increases modal dispersion and limits distance and bandwidth but simplifies coupling and optics. So, the statement that singlemode fiber has a smaller core than multimode fiber is true.

Light travels through a fiber by modes, and the core size determines how many modes can propagate. Singlemode fiber uses a very small core, about 8–10 micrometers in diameter, which confines light to a single propagation path. This single-path design minimizes modal dispersion and supports high bandwidth over long distances. Multimode fiber, on the other hand, has a much larger core—roughly 50 micrometers to 62.5 micrometers—allowing many light paths to travel simultaneously, which increases modal dispersion and limits distance and bandwidth but simplifies coupling and optics. So, the statement that singlemode fiber has a smaller core than multimode fiber is true.

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