XARION Laser Acoustics GmbH


XARION Laser Acoustics GmbH is an exclusive provider of sound and ultrasound sensors without any moving parts. The Membrane-Free Optical Microphone is the worldwide-first sensor to inertia-free convert acoustic pressure changes to an electrical signal. A rigid Fabry-Pérot interferometer senses the change of the refractive index of the medium caused by the acoustic pressure. The method works in every medium in which sound propagates (air/gases or liquids).
XARION’s Optical Microphones have no mechanical resonances as there are no moving parts. The result is a linear and highly sensitive measurement principle working up to extraordinary high frequencies (1 MHz in air, limited by the medium). The sensor head (microphone capsule) contains the Fabry-Pérot interferometer and is made of glass only (no electronics, no metals). It is therefore insensitive against electromagnetic fields, mechanically very stable and does not get damaged, even if the sound pressure exceeds the metering range by several decades. The sensor head is coupled to the electronics via an optical fiber that can be very long, up to hundreds of meters. All the electronics are contained in the signal conditioning unit that operates the laser and the detector. It’s a turn-key system that outputs the (ultra)sound-equivalent signal as an analog voltage via a BNC connector.
The Optical Microphone is the preferred choice for users with highest demands in acoustic metrology realms such as non-destructive testing, process control, high-SPL applications or sound measurement in the presence of EMI.

Dr. Peter Merz
+49 171 9741592
Find us at FO 05

Product and Service Categories

  • Acoustic Emission Testing (AE)
    • Instruments/Transducers
  • Electromagnetic Testing (ET)
    • Barkhausen Noise
    • Flux Leakage Equipment
    • Rail Testing
  • Leak Testing (LT)
    • Instruments
  • Ultrasonic Testing (UT)
    • Probes
    • Phased Array - Probes
  • Other NDT Products
    • Holography, Optical


Steffi Dehlau
German Society for Non-Destructive Testing (DGZfP)
Max-Planck-Str. 6
12489 Berlin Germany
Tel: +49 30 67807-120

WCNDT 2016

The 19th World Conference on Non-Destructive Testing from 13-17 June 2016 in Munich, Germany is the most important event in our global NDT community.

You are cordially invited.