The HP/Agilent 81536A Power Sensor Module is a plug-in optical power measurement instrument for HP/Agilent lightwave multimeter mainframes. It delivers precise power readings across the near-infrared spectrum using an InGaAs sensor element, making it essential for telecommunications and photonics characterization work. The module inserts into compatible 8153A, 8163A, and 8166A mainframes and provides calibrated measurements with ±2.5% uncertainty across the 1000–1650 nm window.
## Technical Specifications
• **Sensor Element:** InGaAs (Indium Gallium Arsenide)
• **Wavelength Range:** 800 nm to 1700 nm
• **Power Measurement Range:** +3 dBm to −70 dBm
• **Uncertainty (Reference Conditions):** ±2.5% over 1000–1650 nm; ±5% ±50 pW total
• **Linearity:** ±0.015 dB ±30 pW (19–38 °C, 0 to −50 dBm); ±0.05 dB ±50 pW (0–55 °C)
• **Noise (1200–1600 nm, 1 sec average):** <50 pW peak-to-peak
• **Display Resolution:** 0.001 dBm or 0.0001 dBm (printout); 100 pW watt resolution
• **Applicable Fiber:** 9/125 µm to 100/140 µm, NA ≤ 0.3
• **Analog Output:** DC to 700 Hz or DC to 4000 Hz depending on range; 0–2 V into open circuit; 600 Ω typical impedance
• **Warm-up Time:** 20 minutes
• **Recalibration Interval:** 1 year
## Key Features
• InGaAs photodetector optimized for telecom and datacom wavelengths
• Wide dynamic range measurement: +3 dBm to −70 dBm
• Analog output for real-time signal monitoring and external logging
• HP-IB interface support (SH1, AH1, T6, L4, SR1, RL1, PP0, DC1, DT1, C0, E2)
• Operating temperature range 0–55 °C; storage to −40–+70 °C
• Compact module footprint: 89 mm (H) × 212.3 mm (W) × 355 mm (D)
## Typical Applications
• Fiber-optic power monitoring in production test
• Optical component and subsystem characterization
• Wavelength-dependent power measurements across 800–1700 nm
• Return loss and insertion loss validation
## Compatibility & Integration
Inserts directly into HP/Agilent 8153A, 8163A, and 8166A lightwave multimeter mainframes. Operates with standard Agilent optical connectors (FC/PC, SC/PC). Optional 12–30 V DC input available (Option 050).
