Cleaning Pens or Sticks: Fiber cleaning pens are designed to clean the end-face of fiber connectors. It provides an expert-curated supplier directory, buyer-focused technical background information, and structured selection criteria to support professional procurement decisions. Why is it important to clean fiber. The most common contaminants found on fiber end faces are fingerprints and just plain old dust. Both can and will block light transmission. Now, you might be thinking “how is that possible?” Consider that the core of the fiber optic cable in single mode fiber is 9 microns (you need a microscope to. Thorlabs offers a complete line of fiber cleaning products specifically designed for terminated fiber, unterminated fiber, or fiber bulkheads such as those found on the front panel of our fiber-coupled laser sources. The FCS3 TravelSAFE a Precision Fiber Cleaning Solvent can be used with the MCC25. Inspection and cleaning of fiber optic end faces have been best practices for some time, yet contaminated connections remain the number one cause of fiber-related problems and test failures for data centers, campuses, and other enterprise or telecom networking environments. Cleaning fiber optic connectors is fast, easy and reliable with our highly engineered solvents, lint-free swabs, precision wipes, and cleaning platforms.