VOA – Variable Optical Attenuator PXIe Module

The VOA is a reliable, fast and high-density variable optical attenuation solution that integrates seamlessly with the PXI Platform.

This innovative module enables new mixed-signal testing capabilities for PXI users. With an integrated power meter, it provides precise output power control, even with fluctuating input.


fast attenuationFast attenuation speed

Fast attenuation speed minimizes the down time during changes in attenuation settings to shorten your overall test time.

low insertion lossLow insertion loss

Maximise your power budget with low insertion loss.

power monitoringBuilt in power monitoring capability

Eliminate the need for an extra power meter with the built-in power monitoring capability. Know the actual power coming out of the attenuator all from the same VOA module.

 0.01pm tuning resolutionConstant power output mode

With the built-in closed-loop power monitoring, the VOA can operate in the constant power output mode to stabilize fluctuating input power.

narrow linewidthWide coverage of operational wavelengths

One versatile tool to cover a wide variety of applications.

seamless PXI integrationSeamless PXI integration

Take advantage of PXI’s integrated triggering and synchronization capabilities across electrical and optical instruments.

3arranty_60x60Product warranty

This product comes with a 3 year warranty.


With its wide coverage of operational wavelengths, the VOA can be used for a wide variety of applications, including:

  • Optical power budget analysis
  • Instrument power calibration
  • BER testing
  • EDFA gain linearity test
  • Transceiver stress testing
  • Receiver sensitivity testing
  • Loss simulation


The VOA in PXIe is designed to be used in continuous production environments. It is built to the highest standards using components with high Mean-Time-Between-Failure (MTBF) specifications to minimize downtime.

Stable power output

The built-in power meter and power stabilization function lets you set and maintain the output power stability even when the input power fluctuates. You will get reliable and repeatable test results each and every time.

Select the best fit for your application

You can choose the broad wavelength range model for versatility or the narrow wavelength models for the best accuracy and performance.

Power stability – power mode

This graph illustrates the power output stability of < 0.005 dB RMS at various power setpoints.






Don’t require PXI?

matrIQ-VOA_600x300_croppedWe offer the same functionality in a compact USB/Ethernet form factor.

See the VOA variable optical attenuator in MATRIQ.


Download Spec Sheet

For more information, please download the VOA Spec Sheet which includes full technical specifications.

 VOA Spec Sheet


If you would like to find out more about this product, please contact us.

Please note: Coherent Solutions is now known as Quantifi Photonics. The new Quantifi Photonics website launches soon at www.quantifiphotonics.com.

Application Notes


Relative Intensity Noise (RIN) Measurement
Semiconductor laser Relative Intensity Noise (RIN) is an important parameter that can cause significant degradation to the performance of fibre optic communications links. It is important for both laser manufacturers and systems designers to understand how RIN is measured to ensure reliable, accurate and repeatable results.

 Relative Intensity Noise (RIN) Application Note


Hardware Triggering of Coherent Solutions’ PXI Optical Modules

PXI’s integrated timing and hardware triggering capabilities offer a number of advantages over more
traditional software-initiated measurements. Learn how to make the best use of the hardware triggering capability present in Coherent Solutions’ PXIe photonics modules.

 Hardware Triggering Application Note


Transient Testing in PXI

Until recently, measurements of power versus time were only available using expensive oscilloscopes and optical-to-electrical converters. These solutions required complex synchronisation and suffered from poor power accuracy and dynamic range in addition to requiring extra equipment.

With the TRACE capability of the optical power meters from Coherent Solutions, you can now capture accurate time domain power meter readings over the entire range of the power meter (>70dB).

 Transient Testing in PXI Application Note


installClick here to download installation guides, drivers and user manuals for this product.

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