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How does a fiber optic cleaner work?

Published in Fiber Optics 3 mins read

A fiber optic cleaner works by physically removing dirt, dust, and other contaminants from the end-face of fiber optic connectors to ensure optimal signal transmission. The cleaning mechanism varies depending on the type of cleaner used, but the core principle remains consistent: to gently and effectively scrub the connector end-face without causing damage.

Here's a breakdown of how different types of fiber optic cleaners work:

Click Cleaners (One-Click Cleaners)

Click cleaners are perhaps the most common type of fiber optic cleaner. They're designed for ease of use and portability. Here's how they function:

  • Cleaning Mechanism: A click cleaner typically contains a spool of lint-free cleaning fabric. When the user presses the tool against the fiber connector and "clicks" it, the tool advances the fabric, wipes the connector end-face, and then retracts the used portion of the fabric into a separate chamber.
  • Motion: The cleaning action involves a linear or rotational wiping motion as the fabric passes over the connector.
  • Contaminant Removal: The fabric traps and lifts away contaminants through physical adhesion.
  • Example: Imagine a miniature, controlled window cleaner specifically shaped for fiber optic connectors.

Pen Cleaners

Pen cleaners are similar to click cleaners in their portability and ease of use.

  • Cleaning Mechanism: Pen cleaners typically feature a replaceable cleaning tip made of a special cleaning material, often a microfibre or a coated material.
  • Motion: The user manually presses and rotates the cleaning tip against the fiber connector end-face.
  • Contaminant Removal: The cleaning material physically lifts and absorbs contaminants.
  • Usage: Suitable for cleaning connectors in hard-to-reach places.

Cassette Cleaners

Cassette cleaners offer a larger cleaning capacity and are often used in field applications.

  • Cleaning Mechanism: They use a cassette containing a long roll of cleaning fabric.
  • Motion: The user presses the connector against the fabric, and a mechanism advances the unused portion of the fabric to clean the connector end-face.
  • Contaminant Removal: Similar to click cleaners, the fabric physically removes and traps contaminants.
  • Advantages: Able to clean a larger number of connectors before needing replacement.

Wet/Dry Cleaning

Wet/Dry cleaning employs a two-step process.

  1. Wet Cleaning: A specialized solvent is applied to the connector end-face using a swab or a lint-free wipe. The solvent helps dissolve and loosen contaminants.
  2. Dry Cleaning: A dry swab or wipe is then used to remove the solvent and the dissolved contaminants.

This method is more effective for removing stubborn residues but requires more careful execution to avoid leaving behind new contamination.

General Principles

Regardless of the specific type of cleaner, all fiber optic cleaners share these core principles:

  • Gentle Cleaning: They use soft, non-abrasive materials to avoid scratching or damaging the delicate glass end-face of the fiber optic connector.
  • Lint-Free Materials: They utilize lint-free fabrics or swabs to prevent leaving behind fibers that could further contaminate the connector.
  • Effective Contaminant Removal: The cleaning materials are designed to effectively trap and lift away dirt, dust, oils, and other common contaminants.
  • Proper Technique: Using the correct cleaning technique, as recommended by the cleaner manufacturer, is critical to prevent damage and ensure effective cleaning.

By effectively removing contaminants, fiber optic cleaners ensure optimal light transmission through the connector, reducing signal loss and maintaining network performance.