Doppler – Compact Photonic Doppler Velocimetry

The compact Doppler benchtop instrument enables Photonic Doppler Velocimetry in a compact and versatile benchtop form factor.

Velocity measurement of fast-moving materials is essential to a growing number of scientific and technical fields including shock physics, the study of material properties, hypervelocity impact testing, detonics and shock wave experiments.

Photonic Doppler velocimetry (PDV) is a well accepted technique used to measure high-velocity events at speeds up to tens of km/s.

The Doppler benchtop instrument combines the key optical components for PDV measurements in a compact instrument to enable streamlined low channel count PDV test setups.


power monitoringAccurate control and measurement of target, probe and reference power

All of your optical power management in a single purpose-built instrument.

high repeatabilityGenerate reliable, repeatable measurements

Minimise the number of manual optical connections for reliable and repeatable measurements.

power monitoring

Versatile configuration

Supports traditional homodyne and frequency-shifted heterodyne PDV testing

narrow linewidth

USB or LAN operation

Connect with USB or LAN for simple setup and operation.

narrow linewidth

Ultra compact and flexible form factor

Housed in a compact and robust metallic case, its extremely small footprint helps you make the most of your available bench space.

low insertion lossSimple, intuitive operation with CohesionUI

CohesionUI makes it simple to control the Doppler from your PC or mobile device. Plus our MATRIQ products come with fully functional LabVIEW™ drivers and support SCPI commands that you can send and receive from MATLAB®, Python, C and C++.

3arranty_60x60Product warranty

This product comes with a 3 year warranty.

Ultra Compact & Portable Design

Our MATRIQ range of compact USB and Ethernet instruments are designed to be portable and versatile,without sacrificing performance.

With a stackable and well-balanced design, they make it easy to stack vertically and save valuable bench space. Plus, when the instruments are not being used for PDV measurements, they can be used individually for other purposes in the lab.



Target Applications

  • Study of material properties and impact response using shock physics
  • Replacement for Velocity Interferometer System for Any Reflector (VISAR) with an integrated fiber-based system.
  • Measure velocities in dynamic experiments with high temporal precision.

A Complete PDV Measurement System

Coherent Solutions matrIQ-Laser CW tunable laser

Laser 1000 Series

Continuous Wave Tunable Laser Source

  • High-power output, narrow 100 kHz linewidth and 0.01 pm resolution tunability.
  • Whisper Mode is an optional feature to remotely disable frequency dither on each laser.
Coherent Solutions matrIQ-Doppler compact PDV


Photonic Doppler Velocimeter

  • Available in standard and power controlled models.
  • Power meter, variable optical attenuator and coupler all in one compact, space saving unit.
Coherent Solutions matrIQ-O2E optical to electrical converter fibre optic


Optical-to-electrical Converter

  • High-bandwidth, broadband optical to-electrical converter with 1 or 2 channels, AC or DC coupling, and various conversion gain and operating wavelength ranges.
  • Built-in amplifier eliminates the need for additional RF amplifier for significant cost savings per channel.

Example: 2 Channel PDV System

Diagram of 2 channel PDV system using Coherent Solutions matrIQ optical test instruments

An introduction to PDV and multi-channel and multiplex systems

wavelength_agile_PDV_video_thumbnail_borderIn this in-depth video, David McCormick, Technical Sales Manager for North America, provides an overview of Photonic Doppler Velocimetry (PDV) and provides in-depth examples of how to integrate multi-channel and multiplexing techniques using Coherent Solutions instruments.

An Overview of Wavelength Agile Photon Doppler Velocimetry 


Questions about PDV?

By working with many customers we have compiled a list of Frequently Asked Questions including PDV techniques and instrument selection.

Example questions:

  • What velocities can be measured with the sampling rate of my oscilloscope?
  • What type of tunable laser sources should I choose?
  • Why are two laser sources needed in a typical PDV system?
  • Should my PDV setup be heterodyne or homodyne?
  • Are there any reflection issues in a PDV system if foil or stainless steel is used?
  • What factors do I need to consider when I choose a collimator or a probe for my PDV system?
  • How do I protect the Doppler instrument from high-power laser at 1064 nm in my PDV system?
  • How is PDV used in distance measurement?

Download PDV Frequently Asked Questions 


Download Spec Sheet

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

 Doppler 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

Application Notes

Download our application note on Photonic Doppler Velocimetry below.

 Photonic Doppler Velocimetry Application Note

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