N7766A Keysight Dual Channel Multimode Optical Attenuator

• Miniature body-shaped optical components for better modal distribution conversion

• Built-in power monitoring function for accurate power setting and stabilization

• Wavelength range: 800 - 1370 nm

• Attenuation range: 0 to 35 dB

• Relative power monitoring uncertainty: ±0.1 dB + 300 pW

• Set-up time: (typical) 200 ms

• Jump rate: selectable from 0.1 to 80 and 1000 dB/s

• Optical path blockage: (typical) >60 dB

The optical attenuator instrument is used to flexibly control the power level of the optical signal in a test system. The primary application is to determine the sensitivity of an optical receiver by measuring the BER versus the input signal power. The N7766A and N7768A provide 2 or 4 attenuator channels, respectively, for multimode fiber systems and are available with 50 µm, 62.5 µm or 80 µm fiber ports. Output power is monitored for accurate and stable power settings independent of input power. Convenient bias parameters allow the power to be set to correspond to the signal after other optical components in the setup path.