The Agilent 81624A is a high-performance optical power head designed for precise measurements of fiber optic power. Featuring a large-area 5 mm Indium Gallium Arsenide (InGaAs) detector, it covers a broad wavelength range of 800 nm to 1700 nm and provides exceptional linearity and low noise floor performance.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | Proprietary connection cable to interface module |
| Recommended Calibration Interval | 2 years |
Physical
| Parameter | Value |
|---|---|
| Power Supply | Powered via the 81618A or 81619A interface module from the mainframe |
| Operating Temperature | 0 °C to 40 °C |
| Dimensions (W×H×D) | 58 mm × 55 mm × 80 mm |
| Weight | 0.25 kg |
Optical & Sensor Specifications
| Parameter | Value |
|---|---|
| Detector Element Material | InGaAs (Indium Gallium Arsenide) |
| Sensor Active Area Diameter | 5 mm |
| Wavelength Range | 800 nm to 1700 nm |
| Optical Power Measurement Range | -90 dBm to +10 dBm |
| Maximum Safe Input Power | +16 dBm |
| Return Loss | > 40 dB |
| Polarization Dependence | < ±0.01 dB (typically) |
Measurement Accuracy & Calibration
| Parameter | Value |
|---|---|
| Reference Calibration Uncertainty | ±2.2% (1000 nm to 1630 nm) |
| Reference Calibration Uncertainty (Extended Range) | ±4.0% (800 nm to 999 nm, 1631 nm to 1700 nm) |
| Total Operating Power Uncertainty | ±3.0% (1000 nm to 1630 nm) |
| Total Operating Power Uncertainty (Extended Range) | ±5.0% (800 nm to 999 nm, 1631 nm to 1700 nm) |
| Linearity (Power Range +10 to -70 dBm) | ±0.015 dB (at 23 °C ± 5 °C) |
| Linearity (Power Range -70 to -80 dBm) | ±0.05 dB (at 23 °C ± 5 °C) |
| Noise (Peak-to-Peak) | < 20 fW (1200 nm to 1630 nm, 1 s average, constant temperature) |
| Zeroing Drift | < 20 fW (over 30 minutes, constant temperature) |
Connectivity & Interfaces
| Parameter | Value |
|---|---|
| Mainframe Connection Cable Length | 2 m |
Physical & Mechanical Properties
| Parameter | Value |
|---|---|
| Aperture Diameter | 5 mm |
Environmental & Compliance
| Parameter | Value |
|---|---|
| Storage Temperature Range | -40 °C to +70 °C |
| Maximum Operating Humidity | 95% R.H. (0 °C to 40 °C, non-condensing) |
Compatibility & System Accessories
| Parameter | Value |
|---|---|
| Compatible Mainframe Models | Agilent / Keysight 8163A, 8163B, 8164A, 8164B, 8166A, 8166B |
| Compatible Interface Modules | Agilent / Keysight 81618A (single channel), 81619A (dual channel) |
Operating Conditions
| Parameter | Value |
|---|---|
| Warm-up Time | 40 min |
Technology
Indium Gallium Arsenide (InGaAs) Photodiode
Applications
Fiber Optic Power Measurement
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