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Multimode fiber optic cables are a type of optical fiber cable designed to carry multiple modes of light simultaneously. These cables are commonly used in short-distance data communication applications, such as local area networks (LANs) and data centers, due to their relatively low cost and ease of installation. Multimode fibers typically have a larger core diameter compared to single-mode fibers, which allows for the propagation of multiple light paths or modes. This characteristic enables multimode fibers to support higher data transmission rates over shorter distances compared to single-mode fibers.

Multimode fiber optic cables are available in various types, including step-index and graded-index fibers. Step-index fibers have a uniform refractive index across the core, while graded-index fibers have a refractive index that gradually decreases from the center to the outer edge of the core. Graded-index fibers are preferred in long-distance applications due to their ability to minimize modal dispersion, which is the spreading of light pulses as they travel through the fiber.

Multimode fiber optic cables are typically protected by a primary coating, which provides mechanical protection and helps to prevent moisture and contaminants from entering the fiber. The primary coating is usually made of materials such as acrylate or polyurethane. Additionally, multimode fiber optic cables may be further protected by a secondary coating, which provides additional mechanical protection and helps to prevent damage during installation.

Multimode fiber optic cables are connected to other devices using various types of connectors, such as LC, SC, ST, and FC connectors. These connectors are designed to provide a secure and reliable connection between the fiber optic cable and the device, ensuring minimal signal loss and optimal performance.