fiber optic sensing


Measuring in waves

A fiber Bragg grating (FBG) is a microstructure within the core of an optical fiber that comprises a periodic modulation of the refractive index of the underlying glass material. If broadband light guided within the core hits on this periodic microstucture, one specific wavelength gets reflected and all other wavelengths of the guided broadband light can pass unhindered.


The periodicity of the FBG defines which specific wavelength is reflected and inscribed into the glass, like a spectral finger print. This property of the grating will change slightly under an induced external force or temperature change, leading to a specific wavelength shift of the light reflected at the FBG.

Unique features
Uncomparable benefits

„  Thermal range from -180°C to 800°C

„  Strain sensitivity:  +/- 0,4 µε

„  Thermal sensitvity:  +/- 0,1 °C

„  FBG sensors with NO insertion error thanks to 125 mm external diameter of the fiber.

„  Total EMI immunity. FBG sensors are chemically inert, insensitive to oxidation and erosion.

„  No electric signal inside the fiber optic, so FBG sensors can be used totally submerged in a liquid , even gasoline, without risk of malfunction or explosion.

„  Stable embedded FBG sensors  installation inside carbon fiber components, with special autoclave-proof APC/FC connectors.


„  Dedicated multichannel interrogator units designed and engineered by Global Sensing

„  Up to 70 sensors per channel