Agilent/Keysight 81534A High-Power Optical Head

The Agilent/Keysight 81534A is an optical return loss module for precise measurement of reflections in fiber optic networks. Designed for integration into Agilent/Keysight mainframe units, this module delivers accurate single and aggregate return loss characterization across the C and L bands. It employs an InGaAs sensor element with an integrated directional coupler for sensitive detection of reflected optical power.

– Technical Specifications

• Wavelength Range: 1250 nm to 1600 nm
• Dynamic Range: Up to 60 dB at 0 dBm input power
• Sensor Element: InGaAs
• Applicable Fiber Type: 9/125 µm single-mode fiber
• Total Uncertainty:
– < ± 0.40 dB for 0 dB to 50 dB return loss
– < ± 0.65 dB for 50 dB to 60 dB return loss

– Key Features

• Integrated directional coupler for high-sensitivity reflected power measurement
• Measurement of single reflections from connectors, splices, and attenuators
• Capability to assess aggregate return loss from devices with multiple reflections
• Modular architecture for direct installation into compatible mainframes
• Storage and shipment temperature range: −40°C to +70°C

– Typical Applications

• Component-level return loss characterization
• Connector and splice quality assessment
• Attenuator performance validation
• Multi-reflection aggregate return loss measurement
• Single-mode fiber network diagnostics

– Compatibility & Integration

The 81534A integrates into the following Agilent/Keysight mainframe units: 8153A, 8163A, 8163B, 8164A, and 8166A series. Module operation depends on the mainframe's environmental specifications.