Femtosecond Laser Processing

We are pioneers in producing innovative sub-micron structures within optical fibers. Based on our proprietary-developed fully-automated femtosecond laser inscription technology we produce Fiber Bragg Gratings (FBGs), 3D shape sensors and highly advanced fiber optical spectrometers.

Shaping Spectra at Nanoscale

Our proprietary FiSens® Grating diffracts light guided within an optical fiber core.

After several years of development, we have managed to integrate a precise lens function into our FiSens® Grating by which light is not only coupled out but also directly focused onto a detector plane.

By this unique approach we achieve a spectrometer with an outstanding ratio of physical resolution to focal length. This proceeds from the observation that the core of the fiber acts as a slit itself and by its virtue of being a waveguide, directs all light at high densities through all lines of our FiSens® Grating.


Worldwide smallest high-resolution (<1nm) spectrometer.

We offer you a highly functional and low-cost solution for interrogating fiberoptic sensors or for spectroscopy applications.

Fiberoptic Sensor

Customize your own optical sensing fiber for measuring strain, temperature, force or even 3D bending at various locations along the fiber.

Contact Us.

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Our Address.

FiSens GmbH
Rebenring 33
38106 Braunschweig