Laser Doppler Vibrometry

Laser Doppler Vibrometry is a way to make 3D images of moving objects. It is a contactless, non-destructive measurement method that uses light beams as sensors. 


When you point a laser beam at a moving surface, the reflected light is backscattered at a slightly different frequency. This frequency shift is compared to a reference laser beam, allowing you to tell the velocity and displacement of the moving surface.

Koheras lasers are ideal for interferometric sensing

When making interferometric sensing systems – such as laser Doppler vibrometers – it is important to use a laser with a very narrow linewidth to get accurate feedback. With their intrinsic low phase noise and narrow linewidth, the Koheras lasers are ideal for interferometric sensing systems with high demands to dynamic range and sensitivity.

Our unique fiber laser design ensures high wavelength stability and no need for periodic adjustments to the laser’s center wavelength. Furthermore, its true single-mode & mode-hop free operation enables stable system performance.

With documented low failure rates, we proudly deliver the most reliable low-noise lasers on the market. Our lasers boast a long life in demanding industrial environments where uptime is critical due to their inherently compact and robust design.

Useful in many industries

Due to the versatility, the laser Doppler vibrometry method is used to measure a wide range of displacements, from slow to very high-frequency movements.

Precise measurements of mechanical displacement are vital for quality control and structural optimization in the automotive, civil engineering, and aerospace industries.

High optical performance combined with industrial robustness

Our Koheras BASIK MIKRO E15 laser is a popular choice with manufacturers of commercial laser-based vibrometer systems, whether it is single-point, multi-point, or scanning vibrometry. With its robust and compact OEM footprint and very narrow linewidth and low-frequency noise, it combines the best of the scientific and industrial worlds.

Use the Koheras lasers to get:

  • Precise measurements of complex and sensitive mechanical structures
  • Stable system performance due to true single-mode & mode-hop free laser operation
  • Robust fiber laser design suitable for industrial field applications