The HP/Agilent 81634B is a low polarization dependence optical power sensor module engineered for precise measurements across the 800 nm to 1700 nm wavelength range. Built around an InGaAs detector element, this high-sensitivity module minimizes polarization-induced measurement errors to <±0.005 dB, making it ideal for polarization-critical device characterization and optical system analysis. The sensor delivers ±3% accuracy (1260 nm to 1630 nm) with total uncertainty of ±5% ±20 pW, supported by exceptional linearity of <±0.02 dB at controlled temperature and <±0.06 dB across the operating range.
Technical Specifications
• Wavelength range: 800 nm to 1700 nm
• Power measurement range: -110 dBm to +10 dBm
• Sensor element: InGaAs (Indium Gallium Arsenide)
• Measurement uncertainty: ±3% (1260 nm to 1630 nm); ±5% ±20 pW total
• Polarization dependence: <±0.005 dB relative uncertainty
• Spectral ripple (interference-induced): <±0.005 dB typical; ±0.015 dB nominal
• Power linearity: <±0.02 dB (23°C ±5°C); 40 dB to >55 dB
• Noise floor: <20 pW (1260 nm–1630 nm); 55 dB (+10 dBm and 0 dBm ranges); >52 dB (-10 dBm); >45 dB (-20 dBm)
• Fiber compatibility: Single-mode and multimode up to 62.5 µm core, NA ≤0.24
• Analog output: Included
– Key Features
• Thermally stabilized, hermetically sealed detector behind protective glass window
• Data logging: up to 100,000 samples; 20,000 samples at minimum averaging times
• Triggered synchronization with tunable laser modules for spectral measurements
• Measurement of minimum/maximum values and stability analysis over time
– Physical Specifications
• Dimensions: 57 mm × 66 mm × 156 mm
• Weight: 0.5 kg
– Compatibility & Integration
Mounts in HP/Agilent optical power meter mainframes: 8163A, 8163B, 8164A, 8164B, 8166A, and 816x series. Requires separately purchased Agilent 81000xI Series optical interface connector.
