The Keysight 81570A is a high-performance Variable Optical Attenuator (VOA) module designed for Keysight/Agilent 8163A/B, 8164A/B, and 8166A/B Lightwave Multimeter mainframes. It operates over a broad wavelength range of 1200 nm to 1700 nm and is optimized for standard single-mode fiber applications, offering low insertion loss, high attenuation accuracy, and excellent repeatability.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | None (controlled via mainframe GPIB, LAN, or USB) |
| Display | None (uses mainframe display) |
| Recommended Recalibration Period | 2 years |
Physical
| Parameter | Value |
|---|---|
| Power Supply | Powered by mainframe |
| Operating Temperature | 0 °C to 45 °C |
| Dimensions (W×H×D) | 32 mm × 75 mm × 335 mm |
| Weight | 0.5 kg |
| Form Factor | Single-slot module |
Optical Performance
| Parameter | Value |
|---|---|
| Wavelength Range | 1200 nm to 1700 nm |
| Fiber Type | Single-mode 9/125 µm |
| Attenuation Range | 0 dB to 60 dB |
| Insertion Loss | <= 1.0 dB (typical 0.7 dB, excluding connectors) |
| Return Loss | > 45 dB (typical > 55 dB with angled connectors) |
| Maximum Input Power | +23 dBm |
| Attenuation Resolution | 0.001 dB |
| Polarization Dependent Loss (PDL) | < 0.05 dB peak-to-peak @ 1550 nm (typically < 0.02 dB) |
| Spectral Ripple | < 0.01 dB (typical) |
| Attenuation Repeatability | +/- 0.01 dB (typical) |
| Attenuation Uncertainty (<= 15 dB) | +/- 0.05 dB |
| Attenuation Uncertainty (15 to 30 dB) | +/- 0.08 dB |
| Attenuation Uncertainty (30 to 45 dB) | +/- 0.15 dB |
| Attenuation Uncertainty (45 to 60 dB) | +/- 0.25 dB |
| Polarization Mode Dispersion (PMD) | < 0.01 ps |
| Shutter Isolation | >= 80 dB |
Control & Interface
| Parameter | Value |
|---|---|
| Transition Time | Typically 100 ms |
| Optical Connectors | Requires two Keysight 81000xI connector adapters |
| Mainframe Compatibility | Keysight / Agilent 8163A/B, 8164A/B, 8166A/B |
Environmental
| Parameter | Value |
|---|---|
| Storage Temperature Range | -40 °C to +70 °C |
| Operating Humidity | < 95% R.H. at 0 °C to 40 °C (non-condensing) |
| Storage Humidity | Non-condensing |
Calibration
| Parameter | Value |
|---|---|
| Wavelength Setting Resolution | 0.1 nm |
Performance
| Parameter | Value |
|---|---|
| Warm-up Time | 20 min |
Technology
Fiber Optic
Applications
Optical Signal Attenuation