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12-core multimode optical cable splicing method

Fiber and communications infrastructure knowledge brief Published 25 Mar 2022

Use this reference to prepare product questions for CJC FIBRE. Check interfaces, capacity, protection and installation requirements against the current product documentation.

Fusion splicing is the preferred method for 12-core multimode optical cables, providing low loss, high reliability, and long-term stability.

Overview

Splicing a 12-core multimode optical cable involves joining each fiber individually or as a ribbon to ensure continuous light transmission with minimal loss. Two main methods exist: fusion splicing and mechanical splicing, with fusion splicing being the most widely used due to its low attenuation (typically 30 mm to prevent microbends. Cleaning: Wipe the exposed fibers with an IPA-soaked swab to remove oils and debris.

Avoid touching the glass surface to prevent contamination. Cleaving: Use a precision fiber cleaver to create a flat, mirror-like end face. A poor cleave can cause high splice loss or failure.

Fusion Splicing Procedure

Machine Setup: Use a fusion splicer with parameters preset for multimode fibers. Ensure the V-groove clamps are clean and aligned. Fiber Alignment: Place each fiber in the splicer's V-groove.

Multimode fibers require careful alignment due to their larger core and graded-index profile. Some splicers allow active core alignment to optimize coupling. Splicing: Initiate the fusion process.

The splicer uses an electric arc to weld the fiber ends together, forming a continuous optical path. Protection: Slide a splice sleeve over the joint and heat-shrink it to protect the splice from mechanical stress and environmental factors. Mechanical Splicing (Alternative)Mechanical splicing is faster but less permanent, with typical losses around 0.

2–0. 3 dB. It uses an alignment device and index-matching gel to hold fibers in place.

This method is suitable for temporary connections or field repairs.

Ribbon or Multi-

Fiber Considerations

For a 12-core cable, fibers may be spliced individually or as a ribbon. Ribbon splicing allows simultaneous fusion of multiple fibers, improving efficiency and consistency. Ensure that the ribbon orientation is correct to maintain fiber mapping.

Quality and Testing

Inspect each splice under a microscope to confirm a clean, flat end face and proper alignment. Measure splice loss using an optical power meter or OTDR. Multimode fusion splices typically achieve

12-core multimode optical cable splicing method - CJC FIBRE CONSULTANTS [PDF]

12-core multimode optical cable splicing method

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Technical note

This reference is intended for preliminary fiber and communications infrastructure research. Optical interface, fiber type, port or core capacity, electrical input and output, enclosure protection, cooling, installation limits and applicable standards must be verified for the specific project.

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