HP / Agilent 81623A Ge Optical Head, 5mm Diameter

The HP/Agilent 81623A Ge Optical Head is a germanium photodiode sensor designed for optical power measurement across telecommunications, fiber optic, and laser monitoring applications. The 5mm diameter aperture receives incident optical radiation and converts it to a proportional electrical signal for transmission to a compatible optical power meter mainframe. This optical head delivers the sensitivity and spectral response characteristics required for precision power sensing in laboratory and field environments.

– Technical Specifications

• Sensor Type: Germanium (Ge) photodiode
• Aperture Diameter: 5 mm
• Responsivity: Measured in Amperes per Watt (A/W) or Volts per Watt (V/W) depending on power meter input configuration
• Noise Equivalent Power (NEP): Lower values indicate superior sensitivity and minimum detectable optical power
• Response Time: Speed of optical head reaction to changes in incident optical power
• Calibration Wavelengths: Standard wavelengths at which sensor performance is characterized and calibrated

– Key Features

• 5mm diameter optical aperture optimized for Ge photodiode spectral response
• Electrical output signal proportional to incident optical power
• Photodiode and associated output circuitry integrated within compact optical head assembly
• Designed for direct interface with HP/Agilent optical power meter mainframes
• Ge detector technology provides wavelength coverage suitable for infrared and near-infrared measurements

– Typical Applications

• Telecommunications optical power measurements
• Fiber optic system testing and characterization
• Laser power monitoring and stability assessment
• Optical research and development requiring Ge detector spectral response

– Compatibility & Integration

The 81623A Ge Optical Head interfaces exclusively with HP or Agilent (Keysight) optical power meter mainframes. Proper signal interpretation requires compatible electrical connectors and meter-specific calibration factors for the photodiode head. Consult your power meter documentation for detailed compatibility requirements and connector specifications.