Single Mode Fiber

Advantages of Single Mode Fiber. Single mode fiber doesn’t have modal dispersion, modal noise, and other effects that come with multimode transmission; single mode fiber can carry signals at much higher speeds than multimode fibers. They are standard choice for high data rates or long distance span (longer than a couple of kilometers) telecommunications which use laser diode based fiber optic transmission equipment.

Disadvantages of Single Mode Fibe. Since single mode fiber’s core is so much smaller than a multimode fiber’s core, coupling light into single mode fiber requires much tighter tolerances than coupling light into the larger cores of multimode fiber. However, those tighter tolerances have proved achievable.

Single mode fiber components and equipment are also more expensive than their multimode counterparts, so multimode fibers are widely used in systems where connections must be made inexpensively and transmission distances and speeds are modest.

September 6, 2011

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