The Keysight 81578A is designed for 50um and 62.5um multimode fiber applications. It features excellent wavelength flatness and can handle input power levels up to +27dBm
- High Input Power Level: 2W
- Wide Wavelength Range: 700nm to 1400nm (MM)
The Keysight 81578A variable optical attenuator is designed for multimode fiber applications and features lowest insertion loss and excellent wavelength flatness over a complete attenuation range of 60 dB, for characterizing optical network components for telecomunication and data communication in systems.
Features:
- Built-in Shutter for Power Meter Zeroing
- Built-in Calibration Capability
Benefits:
- The integrated shutter protects test equipment and simplifies referencing and power meter zeroing without changes in the setup.
- Enhanced internal calibration feature reduces uncertainties and speeds up calibration in multi wavelength applications.
Variable Optical Attenuator Modules (Multimode Fibers)
The specifications below are valid for constant operating and signal launch conditions.
| 81578A #050 | 81578A #062 | ||
| Connectivity | Straight connector versatile interface | ||
| Fiber type | 50/125 μm MMF | 62.5/125 μm MMF | |
| Wavelength range | 700 nm to 1400 nm | ||
| Attenuation range | 0 to 60 dB | ||
| Resolution | 0.001 dB | ||
| Repeatability 1, 2, 5 | ± 0.015 dB | ||
| Accuracy (uncertainty) 1, 2, 3, 4, 5 |
Typ. ± 0.15 dB (800 nm to 1350 nm) ± 0.2 dB (at 850 nm ± 15 nm, 1310nm ± 15 nm) |
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| Settling time 6 | Typ. 100 ms | ||
| Transition speed | Typ. 0.1 – 12 dB/s | ||
| Insertion loss 1, 2, 4, 5 |
Typ. 1.0 dB (NA = 0.1) Typ. 1.3 dB (NA = 0.2) 2.0 dB (NA = 0.2) |
Typ. 1.0 dB (NA = 0.1) Typ. 3.0 dB (NA = 0.27 2.0 dB (NA = 0.2) Typ. 3.0 dB (NA = 0.27 |
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| Return loss 2, 5, 7 | Typ. 27 dB | ||
| Maximum input power 8 | +27 dBm | ||
| Shutter isolation | Typ. 100 dB | ||
| Dimensions (H x W x D) | 75 mm x 32 mm x 335 mm (2.8” x 1.3” x 13.2”) | ||
| Weight | 0.9 kg | ||
| Recommended recalibration period | 2 years | ||
| Operating temperature | 10 °C to 45 °C | ||
| Humidity | Non-condensing | ||
| Warm-up time | 30 minutes | ||
1. At constant operating conditions
2. Effective spectral bandwidth of source > 5 nm
3. For mode launch conditions with NA = 0.2; for every ΔNA = 0.01 add typ. ± 0.01 dB
4. Temperature within 23 °C ± 5 °C and unpolarized light
5. At 850 nm ± 15 nm, 1310 nm ± 15 nm
6. Step size < 1 dB, for full range: typ. 6 seconds
7. The return loss is mainly limited by the return loss of the front panel connectors
8. Keysight Technologies Deutschland GmbH assumes no responsibility for damages caused by scratched or poorly cleaned connectors