The Keysight (Agilent) 81633A is a high-performance optical power sensor module designed for use with the Keysight 816x series Lightwave Multimeters. Featuring a 5 mm InGaAs sensor element, it covers a broad wavelength range of 800 nm to 1700 nm with a power measurement range from -90 dBm to +10 dBm. It offers exceptional linearity, extremely low polarization dependence, and a front-panel analog output, making it highly suitable for precise optical component characterization.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | Mainframe proprietary slot interface; Front-panel BNC analog output |
| Display | None (uses mainframe display) |
Physical
| Parameter | Value |
|---|---|
| Power Supply | Powered directly via mainframe slot |
| Operating Temperature | 0 °C to 40 °C |
| Dimensions (W×H×D) | 75 mm × 32 mm × 282 mm |
| Weight | 0.5 |
Sensor Technology & Architecture
| Parameter | Value |
|---|---|
| Sensor Element | InGaAs (Indium Gallium Arsenide) |
| Sensor Diameter | 5 mm |
| Number of Channels | 1 |
Measurement Ranges & Power Specifications
| Parameter | Value |
|---|---|
| Wavelength Range | 800 nm to 1700 nm |
| Power Measurement Range | -90 dBm to +10 dBm |
| Maximum Safe Input Power | +16 dBm |
Accuracy, Calibration & Noise
| Parameter | Value |
|---|---|
| Uncertainty at Reference Conditions | ±2.5% (at 1310 nm and 1550 nm) |
| Reference Conditions | 1310 nm & 1550 nm, -20 dBm, 23 °C ± 5 °C, SM 9/125 µm fiber, non-condensing |
| Linearity (-70 to +10 dBm) | < ±0.015 dB (1200 nm to 1630 nm, 23 °C ± 5 °C) |
| Linearity (-80 to -70 dBm) | < ±0.03 dB (1200 nm to 1630 nm, 23 °C ± 5 °C) |
| Linearity (-90 to -80 dBm) | < ±0.15 dB (1200 nm to 1630 nm, 23 °C ± 5 °C) |
| Total Uncertainty (1000 to 1630 nm) | ±4.0% (±3.0% typical) |
| Total Uncertainty (800 to 1000 nm) | ±6.5% (±5.0% typical) |
| Total Uncertainty (1630 to 1700 nm) | ±6.5% (±5.0% typical) |
| Polarization Dependence | < ±0.01 dB (typical, 1200 nm to 1630 nm) |
| Spectral Ripple | < ±0.01 dB (typical, 1200 nm to 1630 nm, with patchcord) |
Triggering & Sampling
| Parameter | Value |
|---|---|
| Minimum Averaging Time | 100 µs |
| Maximum Averaging Time | 10 s |
Connectivity & Host Interfaces
| Parameter | Value |
|---|---|
| Analog Output Voltage Range | 0 to 2 V into open circuit |
| Analog Output Impedance | 10 kΩ (typical) |
| Analog Output Bandwidth | DC to 5 kHz (typical) |
RF Port Characteristics
| Parameter | Value |
|---|---|
| Optical Connector Interface | Requires Keysight 81000xx series connector adapter |
| Return Loss (Straight SM 9/125 µm) | > 40 dB (typical) |
| Return Loss (Angled SM 9/125 µm) | > 55 dB (typical) |
Meter Compatibility & System Integration
| Parameter | Value |
|---|---|
| Compatible Mainframes | Keysight 8163A, 8163B, 8164A, 8164B, 8166A, 8166B |
| Module Slot Occupancy | 1 slot |
| Recommended Calibration Cycle | 2 years |
Environmental Parameters
| Parameter | Value |
|---|---|
| Storage Temperature Range | -40 °C to +70 °C |
Operating Conditions
| Parameter | Value |
|---|---|
| Warm-up Time | 20 min |
| Operating Humidity | 15% to 95% R.H. (non-condensing, up to 40 °C) |
Measurement Capabilities
| Parameter | Value |
|---|---|
| Logging Capacity | 20000 points |
Performance
| Parameter | Value |
|---|---|
| Noise (Peak-to-Peak) | < 15 fW (1250 nm to 1600 nm, 1 s averaging time, constant temperature) |
| Dynamic Range | 100 dB |
Optical Input
| Parameter | Value |
|---|---|
| Compatible Connector Adapters | Keysight 81000xI series (FC, SC, ST, LC, MU, Bare Fiber, etc.) |
Technology
InGaAs Optical Power Sensor
Applications
Fiber Optic Power Measurement, Component Characterization, Insertion Loss Measurement