HP / Agilent 81632B Power Sensor Module (single channel)

The HP/Agilent 81632B is a single-channel optical power sensor module designed for integration into HP/Agilent lightwave measurement systems. Built around an InGaAs sensor element, it delivers precise optical power measurements across the 800 nm to 1650 nm wavelength range with ±3% accuracy in the 1200 nm to 1630 nm band. The module achieves exceptional linearity of ±0.02 dB ±20 pW across its full dynamic range from +10 dBm to -60 dBm, ensuring reliable characterization of optical components and communication systems. Measurement speed reaches 200 microseconds, enabling rapid power assessment workflows. Low polarization dependent loss and typical polarization-related uncertainty of ±0.015 dB minimize measurement errors across all signal states. Output is provided via BNC analog connector, allowing direct integration with external measurement equipment and data acquisition systems.

Technical Specifications

Sensor Type: InGaAs

Wavelength Range: 800 nm to 1650 nm

Power Range: +10 dBm to -80 dBm

Accuracy: ±3% from 1200 nm to 1630 nm

Power Linearity: ±0.02 dB ±20 pW (+10 dBm to -60 dBm)

Relative Uncertainty due to Polarization: Typ. ±0.015 dB

Polarization Dependent Loss: Low PDL

Measurement Speed: 200 microseconds

Output: BNC Analog Output connector

Key Features

Single-channel configuration for dedicated power measurement

InGaAs sensor optimized for near-infrared wavelengths

High linearity performance across dynamic range ensures minimal distortion

Fast measurement acquisition supports high-throughput testing

Low polarization sensitivity reduces environmental variables

Typical Applications

Optical power characterization in telecom and datacom systems

Component-level testing of optical transceivers and modules

Lightwave system calibration and verification

Fiber-optic signal monitoring

Compatibility & Integration The 81632B integrates with HP/Agilent 8163A, 8164A, 8166A, and 8163B mainframes and multichannel measurement systems. The module is obsolete and no longer manufactured by Keysight.