The HP/Agilent 81635A is a dual-channel optical power sensor engineered for precision measurements across a wide dynamic range in fiber optic systems. This modular sensor integrates directly into Agilent 816x series lightwave mainframes and employs dual InGaAs detectors to deliver low-noise performance with minimal wavelength dependency. It supports both single and parallel multi-sensor configurations, making it suitable for concurrent measurements in complex test setups.
Technical Specifications
• Wavelength Range: 800 nm to 1650 nm
• Power Range: +10 dBm to −80 dBm
• Detector Technology: Dual InGaAs
• Accuracy at Reference Conditions (10 µW, 50 µm fiber, 23°C ±5°C):
• ±3.5% (800 nm to 1200 nm)
• ±3% (1200 nm to 1630 nm)
• Total Measurement Uncertainty:
• ±5.5% ± 200 pW (800 nm to 1200 nm)
• ±5% ± 20 pW (1200 nm to 1630 nm)
• ±4.5% ± 0.5 pW (1000 nm to 1630 nm)
• Linearity (CW, −60 dBm to +10 dBm): <±0.02 dB across full wavelength range
• Spectral Ripple: <±0.005 dB typical
• Polarization Dependence: <±0.015 dB
• Noise (Peak-to-Peak):
• <200 pW (800 nm to 1200 nm)
• <20 pW (1200 nm to 1630 nm)
• Minimum Averaging Time: 100 µs
• Warm-up Time: 20 min
• Calibration Interval: 2 years
– Key Features
• Fiber compatibility: standard SM and MM up to 62.5 µm core, NA ≤ 0.24
• Operating temperature range: +10°C to +40°C, non-condensing humidity
• Compact form factor: 75 mm H × 32 mm W × 335 mm D; 0.5 kg
• NIST-traceable calibration standard
• Storage/shipment rated to −40°C to +70°C
– Compatibility & Integration
The 81635A fits all Agilent/Keysight 816x Lightwave mainframes including 8163A/B, 8164A/B, and 8166A/B models. Flexible connector adapters and bare-fiber options are supported.
