The fiber optic cable used for home delivery is multimode fiber

Home internet fiber delivery typically uses single-mode fiber, not multimode fiber.

Fiber optic cables come in two main types: single-mode and multimode. Single-mode fiber has a small core (around 9 µm) that allows only one light path, enabling long-distance transmission with minimal signal loss, making it ideal for connecting homes to the broader internet infrastructure . In contrast, multimode fiber has a larger core (50–62.5 µm) that supports multiple light modes, which is suitable for short-distance, high-capacity links within buildings or data centers .

Why Single-Mode Fiber is Used for Home Delivery

• Distance: Home fiber connections often span several kilometers from the central office or fiber node. Single-mode fiber can maintain signal integrity over these distances, whereas multimode fiber is limited to a few hundred meters at high speeds .
• Cost Efficiency: While multimode fiber and its transceivers are cheaper for short runs, single-mode fiber reduces the need for signal repeaters and supports future upgrades to higher speeds without replacing the cable .
• Performance: Single-mode fiber supports higher bandwidth and faster speeds over long distances, which is essential for modern home internet services like gigabit or multi-gigabit connections .

Multimode Fiber Applications

Multimode fiber is primarily used for short-range connections, such as within a building, data center, or campus network. It supports high data rates (up to 100 Gbps) but over limited distances (typically 300–550 meters for OM3/OM4 fiber), . Its larger core allows multiple light modes, which increases modal dispersion and limits long-distance performance.

Conclusion

Although multimode fiber is widely used in enterprise and data center environments for short-range, high-capacity links, residential fiber-to-the-home (FTTH) deployments almost exclusively use single-mode fiber due to its superior distance capability, bandwidth, and future-proofing advantages . Multimode fiber is generally not used for home delivery.