FemtoFiberTec
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Frequently Asked Questions

FemtoFiberTec's inscription technology for FBGs is based on infrared fs-laser technology, which induces local refractive index changes in a point-by-point writing process. This process is highly nonlinear and independent of the fiber material, which means that doping the fiber is not required. The FBGs can be written in radiation insensitive fibers and special pure core fibers for harsh environments.

The cutoff wavelength for the pure core polyimide fiber used in the FFT.FBG.S.02.01/2/3 FBGs is <1290nm.

The pure core polyimide fiber used in the FFT.FBG.S.02.01/2/3 FBGs can withstand temperatures up to 300°C (400°C short term).

Different FBG reflectivity levels are available depending on the requirements of the interrogation unit. The FFT.FBG.S.02.01/2/3 FBGs come in low, medium, and high reflectivity options, with reflectivity levels of >20%, >50%, and >70%, respectively.

The FFT.FBG.P.02.01/2/3 FBGs are well suited for very high temperature and strain measurements up to 300°C (400°C short term).

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