Four-core household optical fiber cable

A four-core optical fiber cable contains four individual fibers within a single jacket, supporting duplex communication and redundancy for home or small-scale networks.

Structure and Components

A typical 4-core optical fiber cable consists of: Optical Fibers: Four strands of glass or plastic that carry light signals independently, allowing two duplex links or one duplex link with two backup fibers for redundancy. Buffer Tubes: Loose or tight buffers protect the delicate fibers; some cables use gel-filled tubes for additional protection. Strength Members: Aramid yarn (Kevlar) for indoor cables or steel wire for outdoor cables prevents stretching and mechanical damage.

Outer Jacket: Materials like LSZH (Low Smoke Zero Halogen) for indoor safety or PE (Polyethylene) for outdoor waterproofing.

Single-

Mode vs. MultimodeSingle-Mode (OS2): Supports long-distance transmission up to 100 km, ideal for FTTH connections. Multimode (OM3/OM4): Suitable for shorter distances within homes or buildings, typically used for LAN or campus networks.

ApplicationsFour-core cables are commonly used for: Fiber-to-the-Home (FTTH) connections, linking the final user to the GPON line. Home or small office networks, providing high-speed internet and data transmission. Redundant links, ensuring network reliability with backup fibers.

Color Coding

Following the TIA-598-C standard, the first four fibers are typically colored Blue, Orange, Green, and Brown, which is important for splicing and termination. Testing and QualityHigh-quality 4-core cables undergo testing with Optical Time Domain Reflectometers (OTDR) to verify splice loss, measure length, and detect faults. Testing wavelengths often include 1310, 1550, and 1625 nm.

Pricing

Prices vary based on type, length, and jacket material: Basic indoor LSZH cables: around $0. 40 per meter. Ruggedized outdoor or armored cables: up to $1.

80 per meter. A 100-meter reel of single-mode OS2 cable typically costs $60–$90, with bulk discounts available for larger orders.

Summary

A four-core optical fiber cable is a versatile, reliable solution for household or small-scale networking, offering high-speed data transmission, redundancy, and compatibility with both single-mode and multimode systems. Proper selection of cable type, jacket material, and testing ensures long-term performance and safety.