The Rifocs 558B is a high-intensity optical power meter engineered for accurate measurement across fiber optic networks with elevated power levels. Built for field and laboratory deployment, it delivers precise signal strength analysis, insertion loss testing, and link loss characterization through a 2 mm InGaAs photodetector with NIST-traceable calibration at 980 nm, 1310 nm, and 1550 nm.
Technical Specifications
Optical Performance
• Detector: 2 mm indium-gallium-arsenide (InGaAs) photodetector
• Measurement range: +25 dBm to -30 dBm (1310 nm and 1550 nm); +25 dBm to -27 dBm (980 nm)
• Absolute accuracy: ±0.25 dB at calibration conditions
• Resolution: ±0.01 dB
• Linearity: ±1.0 dB (+25 to +22 dBm); ±0.5 dB (+22 to +18 dBm); ±0.2 dB (+18 to +10 dBm); ±0.05 dB (+10 dBm to -30 dBm) at 1310 nm and 1550 nm
• Wavelength dependence: 0.025 dB/nm (975–985 nm); 0.0033 dB/nm (1270–1330 nm); 0.0016 dB/nm (1500–1625 nm)
• Polarization dependence: 100 hours continuous operation); optional AC adapter available
– Key Features
• Three-button user interface controlling all functions
• Dual display modes: relative logarithmic (dB) and absolute logarithmic (dBm)
• Multi-wavelength reference storage for rapid testing workflows
• User-selectable auto-shutoff
• Splashproof design for field durability
• Snap-On Connector (SOC) interface compatible with standard fiber optic connectors
– Typical Applications
• Insertion loss and link loss testing on multimode and single-mode fiber, connectors, and installed cable plants
• Output power measurement from optical amplifiers and transmitters
• CATV system analysis and high-power optical device characterization
– Compatibility & Integration
The SOC interface adapts to industry-standard fiber optic connectors. Operation with external light sources enables comprehensive loss-budget analysis across installed networks.


















