Agilent/Keysight 81636B Optical Power Sensor Module

The Keysight 81636B is an InGaAs optical power sensor module that delivers accurate measurements across the 1250–1640 nm wavelength band. Designed for integration into Keysight 816x Lightwave mainframes, this module measures optical power from +10 dBm to –80 dBm with ±3% accuracy (1260–1630 nm) and total uncertainty of ±5% ±20 pW. The sensor provides >55 dB dynamic range in manual mode and features low polarization dependence of 55 dB (manual range mode)
• Linearity: CW +10 to –60 dBm (1260–1630 nm)
• Analog bandwidth: 17 kHz
• Data acquisition time: 25 µs (minimum averaging time)
• Data logging capacity: 100,000 samples
• Polarization dependence: <±0.015 dB; ±0.01 dB typ. (angled connector)
• Applicable fiber: Standard SM and MM up to 62.5 μm core, NA ≤0.24
• Analog output: Voltage proportional to optical signal strength

– Key Features

• Low polarization dependence for stable readings across fiber types
• High-speed data logging captures transient behavior and long-term stability trends
• Triggered synchronization with tunable laser modules enables automated spectral sweeps
• Parallel measurement capability—use multiple modules simultaneously for multichannel characterization
• NIST and PTB traceability for calibrated confidence

– Typical Applications

• Data logging and minimum/maximum value recording over extended periods
• Spectral characterization via triggered synchronization with tunable sources
• Optical component alignment and power optimization
• Multichannel device power verification

– Compatibility & Integration

• Fits all Keysight 816x Lightwave mainframes
• Supports single or multiple-module configurations
• Requires Agilent 81000xI Series optical interface connectors (sold separately)
• Connector adapter sold separately