Keysight 81628B Optical Power Head

Overview

The Keysight 81628B is an optical power head designed for accurate high-power measurements of optical signals. It features a built-in integrating sphere with wavelength-dependent calibration that distributes power over a large surface away from the detector, ensuring linearity and temperature stability. The sensor connects to Keysight 816x mainframes via the 81618A single-channel or 81619A dual-channel interface module.

Key Features

• High input power measurement capability up to +40 dBm with integrating sphere
• Wide 8 mm diameter aperture for flexible input configurations
• Wavelength-dependent calibration for accuracy across the measurement range
• Averaging time settings from 100 µs to 10 s
• Automatic power ranging and min/max value monitoring
• Data logging capacity of up to 20,000 samples
• Detachable heatsink for operation with input power above 2W

Applications

• High-power optical signal measurement
• Fiber-coupled optical systems testing
• Open-beam optical power monitoring
• Integrating sphere measurements for distributed power analysis

Included Accessories

• Fiber adapters for common connector types
• Bare fiber clamps