Agilent 81521B High Powered Optical Head Interface / Tested and calibrated

The Agilent 81521B is a high-powered optical head interface for precision optical power measurement across telecommunications wavelengths. This germanium detector module integrates with Agilent lightwave mainframes to deliver accurate signal analysis and power monitoring in amplifier testing, system characterization, and light source verification. The unit arrives tested and calibrated to OEM specifications.

– Technical Specifications

• Wavelength Range: 900 to 1700 nm
• Detector Type: Germanium (Ge)
• Detector Diameter: 5 mm
• Power Measurement Range: +3 dBm to −80 dBm
• Wavelength Accuracy: ±2.2% (typically 1000–1650 nm)
• Noise Floor: <600 pW peak-to-peak (1200–1600 nm, 1 s averaging)
• Linearity: ±0.04 dB (−60 to 0 dBm range)
• Repeatability: <0.02 dB with bare-fiber adapter
• Maximum Power Density: 10 mW/mm²
• Fiber Compatibility: Parallel beam; 9/125 µm to 100/140 µm; NA <0.3
• Dimensions: 170 mm diameter
• Weight: 0.6 kg

– Key Features

• Non-volatile memory stores custom wavelength data
• 5 mm germanium detector optimized for near-infrared telecommunications band
• Tight linearity specification ensures accurate power readings across dynamic range
• Sub-0.02 dB repeatability with standard bare-fiber adapters
• Connector interfaces available upon request; ring adapter compatible with 81000BA, 81533B, 81633A

– Typical Applications

• Optical amplifier characterization and gain measurement
• Lightwave system performance verification
• Broadband light source output validation
• Power monitoring in laboratory and enterprise network environments

– Compatibility & Integration

Direct compatibility with HP/Agilent mainframes: 8153A Lightwave Multimeter, 8152A Optical Average Power Meter, 8163A/8164A/8166 series, E5574A Optical Loss Analyzer, and HP 8169A Polarization Controller.