Conclusions
The photolithographic method with the improvement of the stretch-and-write technique was applied for the fabrication of fiber-Bragg grating arrays. This procedure allows to change the grating peak wavelength utilizing a single phase mask. A properly designed apparatus was described to write spatially and spectrally well separated grating arrays, distributed on a length of fiber, as well as arrays of adjacent gratings spectrally concatenated.
Two different types of FBG arrays were constructed to be used in two different fields of application, that is in sensing and telecommunication systems. In particular an interesting field of application was considered for strain sensing in the automotive industry, to monitor various critical components of vehicles in operating conditions. The replacement of electrical strain gauges with FBG sensors presents certain advantages in terms of linearity, precision, repeatability and the possibility of using only one detecting system due to easy multiplexing with grating arrays.
Another example of application presented is the construction of a transmission pass-band filter, applied to suppress the first side lobes in a laser diode spectrum. The used technique could allow, in principle, to realize superstructure fiber gratings that exhibit a comb-like response in transmission, while in the literature only comb-like reflection response devices are reported.
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© 2002 Kluwer Academic Publishers
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Falciai, R., Fontana, R., Schena, A. (2002). The Stretch-and-write Technique for Fabrication of Fiber Bragg-grating Arrays. In: Martellucci, S., Chester, A.N., Mignani, A.G. (eds) Optical Sensors and Microsystems. Springer, Boston, MA. https://doi.org/10.1007/0-306-47099-3_11
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DOI: https://doi.org/10.1007/0-306-47099-3_11
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