The 81560A attenuates and controls the optical power of light in single-mode optical fibers. It includes power control functionality to allow the user to set the output power level of the attenuator.

It has the following specifications:

Connectivity: Straight connector
Fiber Type: 9/125 µm SMF28
Wavelength Range: 1200 - 1700 nm
Attenuation Range: 0 - 60 dB
Resolution: 0.001 dB
Repeatability: ± 0.01 dB
Accuracy (uncertainty): ± 0.1 dB
Settling Time typ.: < 100 ms
Insertion Loss typ.: 1.7 dB
Polariztion Dependent Loss: < 0.05 dB
Return Loss typ.: > 45 dB
Maximum Input Power: + 23 dBm
Shutter Isolation typ.: > 100 dB