Fiber Bragg gratings have found widespread application in sensor systems, e. g. for
temperature, strain or refractive index measurements. The concept of fiber Bragg gratings allows
also in a simple way the realisation of arrays of such sensors. The development of such optical fiber
sensor systems often requires special fibers and grating structures which may go beyond more
conventional Bragg grating structures in typical communication fibers. Concerning fibers there is,
for example., a need of achieving fiber gratings in small diameter fibers and fiber tapers as well as
in microstructured fibers. Special fiber grating structures are of interest e.g. in the visible
wavelength range, which requires smaller spatial structures compared to more conventional gratings
in the near infrared wavelength region. Examples for such modern developments in fiber Bragg
grating technology for sensor applications will be presented and discussed.
Fiber Bragg Grating Sensors and Sensor Arrays