What is a fiber optic certifier?

A fiber optic certifier (optical certification tester) verifies that installed passive fiber optic cabling meets the requirements of national and international standards, such as ISO/IEC 11801 and DIN EN 50173.

It is essential when the standards-compliant performance and structure of fiber optic links must be verified and documented for new installations or upgrades.

Certification is often required for manufacturer warranties and formal network acceptance.

With WireXpert, WireXpert MP and FiberXpert solutions, Softing IT Networks provides precise and practical tools for all fiber optic applications—from insertion loss and return loss measurements to advanced OTDR analysis for long-distance links.

How does a fiber optic certifier work?

A fiber optic certification tester measures key optical parameters and automatically evaluates results against defined standards.

The typical procedure includes:

  1. Selection of standard and connector type – for multimode or single-mode fiber cabling.
  2. Insertion loss (IL) and return loss (RL/ORL) measurement – ensures signal quality meets required limits.
  3. Length measurement and attenuation analysis – detects faulty sections or excessive distances.
  4. OTDR measurement – identifies the exact location of faults such as splices, connectors, reflections, or fiber breaks.
  5. Automated pass/fail evaluation and reporting – generates standard-compliant reports for acceptance and documentation. 

This allows fiber optic links to be not only measured but also reliably certified—providing critical proof of network quality, compliance, and future readiness.