Measuring multiple zones in a single fiber optic cable
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The MultiZona is a high-tech optical interrogator that simultaneously interrogates multiple Fiber Brag Gratings (FBG) in a single fiber. It is able to measure acoustics, strain and vibration in harsh environments such as areas with high voltages, inside ATEX zones, in electromagnetic fields or in liquids. Because the system reads the sensors simultaneously, different zones can be combined to enable location identification.

MultiZona is a modular system that can be configured to a maximum of 8 channels, sampling each channel at 1 MHz. This powerful system will be part of a network, which enables remote accessibility. Using an interferometric measurement principle the sensitivity gets down to femtostrain level while maintaining  a nanometer noise floor.


Key features

1 MHZ sampling


modular system, up to 8 channels

configuration software

Lan interface, remotely accessible

online data processing

no maintenance, easy to use


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.