VOA – Variable Optical Attenuator

The VOA is a variable optical attenuator with fast attenuation speed, low insertion loss and in-built power meter.

Its advanced power stabilization function lets you set and maintain the output power stability even when the input power fluctuates, and is available in a range of wavelengths to suit a wide range of applications.

Its stackable, space-saving design and intuitive software controls make it a valued addition to the optical lab or test bench.


fast attenuationFast attenuation speed

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

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 VOA.

 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.

low insertion lossSimple, intuitive operation with COHESIONUI

COHESIONUI makes it simple to control VOA from your PC or mobile device. Its cutting edge design offers a sleek modern interface, cross device compatibility, customizable views and remote network access.

narrow linewidth

USB or LAN operation

Connect with USB or LAN for simple setup and operation.

narrow linewidth

Excellent measurement correlation with our optical PXI modules

Shared product architecture lets you validate your system and test requirements in the lab, and scale up to high-volume automated production testing with the VOA PXIe module.

3arranty_60x60Product warranty

This product comes with a 3 year warranty.

Ultra Compact Form Factor

Our MATRIQ products are extremely compact and housed in a robust metallic case to help you make the most of your available bench space.


Wide coverage of operational wavelengths makes the VOA essential for a wide variety of applications:

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

VOA power stability – power mode

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

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.

Request a Quote

* is required