Round to Round Fiber Optic Patch Cord

A round-to-round fiber optic patch cord is a single-jacket cable containing two fibers, typically with duplex connectors at each end, designed for indoor and data center applications.

Overview

A round-to-round fiber optic patch cord (also called a round duplex patch lead) consists of two individual fibers enclosed in a single round jacket, allowing for Tx/Rx transmission. This design is ideal for direct patching in data centers, telecom racks, and indoor networking environments. The round jacket provides durability and easier handling compared to flat or ribbon-style cords.

Fiber Types

Round patch cords are available in both single-mode and multimode fibers: Single-mode fibers: G. 652. D, G.

657. A1, G. 657.

A2, suitable for long-distance and high-speed transmission. Multimode fibers: OM3 and OM4, optimized for high-bandwidth applications like 10G, 40G, and 100G networks. Bend-insensitive fibers are often used to reduce signal loss in tight spaces.

Connector OptionsRound-to-round patch cords can be terminated with a variety of connectors depending on the application: Duplex connectors: LC, SC, FC, ST, MU, SMA, E2000, often in Uniboot configuration for space-saving in racks.

VSF

F connectors: MDC, SN, CS, APC versions for specialized high-density setups. Simplex connectors are also possible but may require a mini breakout or split.

Jacket and Material

The outer jacket can be customized based on installation requirements: Material: LSZH (Low Smoke Zero Halogen) or PVC, with CPR ratings from Eca to B2ca. Color coding: Helps identify fiber type and network function. Kevlar/aramid yarn: Provides tensile strength and protection against handling stress.

ApplicationsRound-to-round patch cords are commonly used for: Data center interconnectsServer-to-switch connectionsTelecom patch panelsFTTH (Fiber to the Home) indoor installations They are designed for high reliability, low insertion loss, and easy installation, with factory-tested end-face quality, IL (insertion loss), and RL (return loss) performance.

Summary

A round-to-round fiber optic patch cord is a versatile, durable solution for indoor fiber connections, offering duplex transmission, multiple fiber types, and a wide range of connector options. It is particularly suited for data centers and high-density networking environments, ensuring efficient and reliable optical signal transmission.