Keysight 81635A Dual InGaAs Power Sensor
The Keysight 81635A is a dual optical sensor plug-in module that fits the 8163, 8164 and 8166 multichannel mainframe series. The Keysight 81635A includes two InGaAs sensor elements with a wavelength range of 800 to 1650 nm and a dynamic range of +10 to -80 dBm. Many different connectors are available for the 81635A power meter interface.
Click the PDF Specification for further information.