Fiber Optic Cable Connection Method 86-type Junction

The 86-type fiber optic junction typically uses SC-family connectors, requiring precise termination, alignment, and adherence to IEC standards for reliable optical performance.Overview of 86-Type Junctions

The 86-type junction refers to a standardized SC 86B fiber optic interconnecting device, which is part of the SC connector family. These junctions are designed to ensure mechanical, optical, and environmental compatibility across fiber optic networks, supporting both single-mode and multi-mode fibers . They are commonly used in patch panels, distribution frames, and network interconnects where high reliability and low insertion loss are critical.

Connection Methods1. Connector Termination

SC 86-type junctions use plug or male connectors with ceramic ferrules to align fibers accurately. The connection process involves:

• Cable Preparation: Strip the outer jacket, Kevlar, and buffer layers to expose the fiber core without damaging it .
• Cleaving: Use a precision cleaver to create a flat fiber end for optimal light transmission .
• Connector Attachment: Install the SC 86 connector using adhesive or mechanical crimping, ensuring the fiber is centered in the ferrule .
• Polishing: For single-mode fibers, polish the ferrule tip to reduce reflectance and insertion loss. Multi-mode fibers may use pre-polished connectors for field termination .
• Mating: Insert the connector into the SC 86B receptacle or adapter, which may use a push-pull or snap-in mechanism for secure alignment .

2. Splicing (Optional)

For permanent connections, fusion splicing can be used:

• Align the fiber cores using a fusion splicer.
• Apply heat to fuse the fibers, creating a low-loss, permanent joint.
• Protect the splice with a heat-shrink sleeve or splice tray .

Standards Compliance

The SC 86B junction adheres to IEC 61754-4:2021 and related IEC 61753 series standards, which define:

• Interface dimensions for SC connectors.
• Mechanical and environmental requirements for plug-pigtail and plug-receptacle configurations.
• Testing procedures for insertion loss, return loss, and durability under controlled and outdoor conditions .

Best Practices

• Always clean fibers and connectors before mating to prevent signal loss.
• Maintain the minimum bend radius and avoid excessive pulling forces on the cable.
• Use OTDR testing to verify the integrity of the connection after installation.
• For outdoor or harsh environments, select connectors rated for OP, OPHD, or OP+HD categories to ensure protection against moisture, dust, and mechanical stress .

Summary

Connecting a fiber optic cable to an 86-type junction involves careful preparation, termination, and alignment using SC-family connectors, optionally supplemented by splicing for permanent joints. Adhering to IEC standards ensures low optical loss, high mechanical strength, and environmental reliability, making SC 86B junctions suitable for both indoor and outdoor fiber optic networks.