Acoustic emission sensors

World's only fully fiber optic AE sensor
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6300 series AE sensors

All-optical fiber-based acoustic emission sensors are the ideal solution for applications in challenging environments where high performances is required

Fiber optic sensors are by principle highly suitable to measure in extreme environments, like in areas with high voltages, inside ATEX zones, in electro magnetic fields or in liquids.

Optics11 6300 series acoustic emission sensors are designed to deliver long time reliable measurements up to 500 KHz. The innovative in-fiber interferometry approach makes these sensors the only all-optical solution that equals the Signal to Noise Ratio of classic electric AE sensors.

Connecting several sensors in a network is possible by using our unique patented readout technology.

Key features


500 Khz measurement


extreme sensitivity

no moving parts, FULLY PASSIVE


Small dimensions

Accurate, pre-calibrated and easy to use

No maintenance required


Standard version
Cryogenic version


ZonaSens is based on optical fiber interferometry and offers a completely new sensor configuration.  Multiple zones in one optical fiber, with lengths of centimeters to meters, can be defined to become extremely sensitive to strain. The beginning and end of a sensing zone are each defined by a Fiber Bragg Grating. To create an interferometry signal between two gratings, a combination of Michelson interferometers is used. A Michelson interferometer uses a single reflection on the transducer side that interferes with a reflection in a reference path. Two linearized interferometers form each sensing zone, resulting in a very high sensitivity and a measurement speed of up to 1 million samples per second. Between the gratings, the sensitive zone can be wrapped around a mandrel to make an acoustic point transducer. The sensitivity is at the femto-strain level, making direct measurement of acoustic vibrations possible. This sensitivity allows for a very small transducer design. Optics11 has a core technology patent for ZonaSens technology.