Sc Two-core fiber optic patch cord

An ST/SC two-core fiber optic patch cord is a duplex fiber cable with two optical fibers, terminated with an ST connector on one end and an SC connector on the other, suitable for high-speed data transmission in telecom and networking applications.

Overview

A two-core fiber optic patch cord consists of two tightly buffered optical fibers enclosed within a single outer jacket. These fibers can be single-mode (OS1, OS2) for long-distance, low-loss transmission or multi-mode (OM1, OM2, OM3, OM4) for shorter distances and higher bandwidth applications . The ST/SC designation indicates that one end of the cable uses an ST connector (bayonet-style) and the other end uses an SC connector (push-pull style), allowing compatibility with different network devices .

Construction

• Core and Cladding: The optical fibers have a glass core (typically 9 µm for single-mode or 50/62.5 µm for multi-mode) surrounded by a low-refractive-index cladding (125 µm diameter), .
• Buffer and Jacket: Each fiber is coated with a protective buffer, and the two fibers are enclosed in a durable outer jacket for mechanical protection .
• Connectors: The ST connector features a bayonet locking mechanism, while the SC connector uses a snap-in push-pull design, ensuring secure and low-loss connections .

Applications

ST/SC two-core patch cords are commonly used in:

• Telecommunication networks for connecting switches, routers, and optical transceivers .
• Data centers and LANs for high-speed data transmission over short to medium distances .
• Fiber-to-the-home (FTTH) and campus networks where mixed connector types are required .
• Optical test equipment setups for signal routing and measurement .

Standards and Compliance

These patch cords typically comply with Telcordia GR-326-CORE for single-mode connectors and IEC 874-1 for fiber optic connectors and cables, ensuring reliable performance and low insertion loss . They are generally designed for indoor use, though some variants are available for plenum or outdoor environments .

Summary

The ST/SC two-core fiber optic patch cord is a versatile duplex cable that combines the ST and SC connector types, supporting both single-mode and multi-mode fibers. It is ideal for connecting devices in telecom, data centers, and LAN environments, providing reliable, high-speed optical signal transmission .