The HP/Agilent 81524A is an InGaAs optical head delivering precision near-infrared power measurements from 800 nm to 1650 nm. This 5 mm diameter sensor integrates with Agilent/HP lightwave multimeter mainframes via the 81533B interface module, providing measurement uncertainty of ±2.2% across the 1000 nm to 1600 nm band. The head resolves to 0.001 dBm with exceptional noise performance—sub-50 pW peak-to-peak and under 5 pW averaged over 1 second in the core wavelength region.
## Technical Specifications
• **Wavelength Range:** 800 nm to 1650 nm
• **Power Measurement Range:** +3 dBm to −90 dBm
• **Measurement Accuracy:** ±2.2% (1000 nm to 1600 nm); ±4% ±5 pW under specific conditions
• **Linearity:** 0 dBm to −60 dBm; +3 dBm to −70 dBm
• **Display Resolution:** 0.001 dBm
• **Noise Performance:** <50 pW peak-to-peak; <5 pW (1 second average) at 1000 nm to 1600 nm
• **Sensor Type & Diameter:** InGaAs, 5 mm
• **Operating Temperature:** 0°C to +40°C
• **Warm-up Time:** 20 minutes
• **Applicable Fiber:** Parallel beam; 9/125 µm to 100/140 µm with NA ≤ 0.3
## Key Features
• Low polarization-dependent loss optimized for optical component characterization
• High return loss performance
• Minimal spectral ripple
• Magnetic D-shape adapter for stable mounting
• Supplied with calibration certificate and data
## Typical Applications
• Optical communication system testing
• Optical component characterization and verification
• Near-infrared fiber optic measurements
## Compatibility & Integration
• **Host Mainframes:** Agilent/HP 8153A, 8163, and 8166 series
• **Required Interface:** HP 81533B Optical Head Interface Module
