Single-mode dual-core indoor drop fiber optic cable

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.

Overview

Single-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 .