Fiber optic length of the cold splice
A typical fiber optic cold splice, using a mechanical connector, is usually around 6 to 10 centimeters in total length, including the ferrule and protective body.
Overview of Cold Splice Components
A fiber optic cold splice, also known as a mechanical splice, joins two fibers without heat. The main components include:
- Ferrule: A small cylindrical piece that holds the fiber in precise alignment with the other fiber.
- Connector body: Encases the ferrule and provides a secure connection to the fiber-optic cable.
- Protective sleeve: Often added to cover the bare fiber ends and ferrule, preventing damage and maintaining alignment . The overall length of the splice assembly, including the ferrule and body, typically ranges from 6 cm to 10 cm, depending on the manufacturer and type of mechanical splice used. The bare fiber portion inserted into the ferrule is usually 1–2 cm, while the protective body adds additional length .
Advantages and Considerations
- Quick installation: Cold splices can be completed in seconds to minutes, much faster than fusion splicing .
- No power required: Ideal for field installations where electricity may not be available .
- Insertion loss: Slightly higher than fusion splices, typically around 0.1–0.3 dB per splice .
- Environmental sensitivity: More susceptible to temperature and humidity changes, so proper protective housing is important .
Comparison to Fusion Splice
Fusion splices, which melt fibers together, are generally shorter in length (around 2–3 cm including the protective sleeve) and provide lower insertion loss and higher durability. Cold splices are preferred for temporary, quick, or cost-sensitive installations, while fusion splices are used for high-performance or permanent networks . In summary, when planning a fiber optic installation using cold splices, you should account for 6–10 cm per splice to accommodate the ferrule, connector body, and protective sleeve, ensuring proper alignment and protection of the fibers.
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