Indoor fiber optic dual-core single-mode

A single-mode dual-core indoor fiber optic cable is a duplex cable designed for long-distance, high-speed data transmission within buildings, featuring two parallel single-mode fibers in a single jacket. OverviewSingle-mode dual-core (duplex) fiber optic cables consist of two single-mode fibers, typically with a 9 µm core diameter and 125 µm cladding, enclosed in a single jacket for indoor use. Each fiber carries a single light mode, minimizing signal dispersion and allowing high-bandwidth transmission over long distances.

These cables are ideal for enterprise networks, data centers, and telecom backbones where reliability and low attenuation are critical.

Key Features

Fiber Type: Single-mode (OS1 for indoor short-range, OS2 for longer distances) supporting 1310 nm and 1550 nm wavelengths. Construction: Duplex or zipcord design with two fibers side-by-side, often with a mid-span separable web for easy termination. Jacket and Rating: Indoor plenum-rated (OFNP) or riser-rated (OFNR) jackets, often LSZH for low smoke and flame resistance.

Strength Members: Aramid yarn or Kevlar reinforcement for tensile strength and durability during installation.

Bend-

Insensitive: Many modern cables use G. 657. A1 fibers, allowing tight bends (minimum radius ~10 mm) without signal loss.

Performance

Attenuation: Typically ≤0. 4 dB/km at 1310 nm and ≤0. 3 dB/km at 1550 nm.

Bandwidth: Supports 1G to 400G applications depending on network equipment. Distance: OS1 cables can reach up to 10 km indoors, while OS2 can extend up to 40 km or more with proper equipment. Connectors: Compatible with LC, SC, ST, or FC connectors; pre-terminated options are available for plug-and-play deployment.

Applications

Data Centers: Horizontal and backbone cabling for high-speed Ethernet (10G/25G/40G/100G). Enterprise Networks: Multi-floor or intra-building connections. Telecom & FTTH: Indoor distribution from main termination points to network endpoints.

Smart Buildings: High-density cabling in plenum spaces with fire safety compliance.

Installation Considerations

Ensure plenum or riser rating matches building code requirements. Maintain minimum bend radius to prevent signal loss. Use duplex connectors for proper transmit/receive alignment.

Pre-terminated or bulk cable options allow flexibility for patch panels and structured cabling. In summary, single-mode dual-core indoor fiber optic cables provide a reliable, high-performance solution for indoor networking, combining long-distance capability, low attenuation, and flexible installation options suitable for modern enterprise and data center environments.