Keysight N7768C Variable Optical Attenuator (4 Channel) - Multimode
Highlights
- Miniature bulk optics for best transfer of modal distribution
- Built-in power monitoring for accurate power setting and stabilizing
- Wavelength range: 800 – 1370 nm
- Relative power monitor uncertainty: ±0.1 dB ± 300 pW
- Settling time: typ. 200 ms
- Transition speed: selectable from 0.1 to 80 and 1000 dB/s
- Optical path blocking: typ. >60 dB
Optical attenuator instruments are used to flexibly control optical signal power levels in test setups. A primary application is determining optical receiver sensitivity by measuring the BER vs. input signal power. The N7768C provides 4 attenuator channels for 50 µm/ OM3 multimode fiber setups.
For dependable multimode transceiver testing, the instrument used to set the power level should not change this modal distribution. The bulk-optic filter and collimated beam path of the N7768C multimode attenuator is designed to assure homogeneous attenuation of all input modes. It maintains the beam profile of signals that comply with the encircled flux conditions of IEC 61280-4-1.
The output power is monitored, especially to allow accurate and stable power setting independent of the input power. Convenient offset parameters allow the set power to correspond to the signal after other optical components in the setup path.
Optical Power Equalization with Ease
The Keysight N7752C and N776-C family of variable optical attenuators enables highly efficient optical transceiver and network integration testing. The new attenuator generation sports an on-board graphical user interface for easy control without software installation, accessible via GbE LAN and USB 2.0 connections.
N7752C is a two-channel model for single-mode fiber equipped with two additional, independent optical power meters.
N7764C is a four-channel model for single mode fiber, and based, like N7752C, on electrically controlled variable optical attenuator (VOA) modules.
N7765C, available with one and two channels and based on a bulk-optical design, addresses single-mode fiber applications that require high dynamic range, high power and low wavelength dependence.
N7768C is a four-channel model for 50/125 μm multimode fiber, based on a miniature rotating filter design optimized to provide an insertion loss of typically only 1.6 dB including connectors. The attenuating filter is positioned in a collimated beam to maintain the same modal distribution across the entire attenuation range.
Optical Power Equalization with Ease
The Keysight N7752C and N776-C family of variable optical attenuators enables highly efficient optical transceiver and network integration testing. The new attenuator generation sports an on-board graphical user interface for easy control without software installation, accessible via GbE LAN and USB 2.0 connections.
N7752C is a two-channel model for single-mode fiber equipped with two additional, independent optical power meters.
N7764C is a four-channel model for single mode fiber, and based, like N7752C, on electrically controlled variable optical attenuator (VOA) modules.
N7765C, available with one and two channels and based on a bulk-optical design, addresses single-mode fiber applications that require high dynamic range, high power and low wavelength dependence.
N7768C is a four-channel model for 50/125 μm multimode fiber, based on a miniature rotating filter design optimized to provide an insertion loss of typically only 1.6 dB including connectors. The attenuating filter is positioned in a collimated beam to maintain the same modal distribution across the entire attenuation range.