Single-mode dual-core fiber optic patch cord st-st

A single-mode dual-core (duplex) fiber optic patch cord consists of two single-mode fibers, each with a 9µm core, designed for high-speed, long-distance optical transmission with two connectors on each end.

Overview

A single-mode dual-core fiber optic patch cord (also called a duplex patch cord) contains two single-mode fibers within a single cable assembly, allowing simultaneous bidirectional data transmission. Each fiber has a 9µm core and 125µm cladding, which supports a single light path per fiber, minimizing signal loss and enabling long-distance communication, typically up to tens of kilometers depending on the fiber type (OS1/OS2) and network equipment . The outer jacket is usually yellow to indicate single-mode fiber .

Connector Types

These patch cords can be terminated with a variety of connectors, including:

• LC: Small form factor, commonly used in data centers and QSFP transceivers
• SC: Square snap-in connector, widely used in telecom and enterprise networks
• FC: Screw-on thread, suitable for high-vibration environments
• ST: Bayonet mount, often found in legacy LAN applications
• E2000: High-performance connector for low insertion loss and high return loss Each end of the duplex cord has two connectors, one for each fiber, enabling simultaneous send and receive channels.

Applications

Single-mode dual-core patch cords are ideal for:

• Data centers: Connecting switches, servers, and patch panels
• Telecom networks: Long-haul and metro fiber links
• Enterprise backbones: High-speed, low-latency connections
• FTTH (Fiber to the Home): When long-distance single-mode transmission is required

Variants and Considerations

• Fiber type: OS1 (indoor, tight-buffered) or OS2 (outdoor, loose-tube)
• Jacket material: PVC (indoor), LSZH (low smoke, zero halogen), or plenum-rated for fire safety
• Duplex vs. simplex: Duplex has two fibers for bidirectional communication; simplex has one fiber for unidirectional transmission When selecting a patch cord, consider distance, environment, connector type, and network speed to ensure optimal performance and minimal signal loss. In summary, a single-mode dual-core fiber optic patch cord is a high-performance, long-distance solution for modern optical networks, providing reliable bidirectional communication with low attenuation and high bandwidth potential .