The EXFO FOA-32 ST Fiber Optic Adapter is a precision screw-on adapter cap that connects ST-terminated fiber optic cables to EXFO test instruments for insertion loss and return loss measurements. The adapter delivers stable, repeatable connections through strict manufacturing tolerances that ensure consistent ferrule positioning in front of the detector. A 200µm aperture blocks back-reflection from the detector lens, eliminating measurement interference and enabling reliable test results across handheld power meters, benchtop detectors, and OTDR systems.
Technical Specifications
• Connector Type: ST (AT&T type ST, ST/PC, ST Super PC, ST Ultra PC)
• Reflection Characteristic: Standard Reflection
• Aperture Design: 200µm aperture to suppress back-reflection
• Form Factor: Screw-on adapter cap
• Construction: Manufactured to strict tolerances for repeatable ferrule positioning
– Key Features
• Low-reflection design minimizes detector lens back-reflection interference
• Durable construction rated for field environments
• Screw-on installation enables quick attachment and removal
• Tight ferrule positioning tolerances support measurement repeatability
• FOA series models achieve typical repeatability of 0.001 dB using LED sources
– Typical Applications
• Insertion loss testing on ST-terminated fiber optic cables
• Return loss characterization in field and lab environments
• Power meter measurements on EXFO handheld and benchtop instruments
• OTDR testing with integrated power meter detection
– Compatibility & Integration
The FOA-32 connects to all EXFO handheld power meters, stand-alone power meters, OTDRs with built-in power meters, and benchtop modular detectors. It is specifically designed for ST connector terminations and integrates into EXFO test system architectures for fiber optic cable qualification and troubleshooting workflows.


















