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In this paper, the concept and experimental characterization of tilted fiber Bragg grating (TFBG) based sensor for temperature and liquid level measurement are presented. It is shown that, when liquid level increases the peak amplitudes of cladding modes linearly decreases (in dB). In turn, changes in temperature causes a shift of the TFBG transmis...
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... be means of CW UV argon ion laser 18 . Before the grating inscription, optical fiber was hydrogenated at room temperature under the pressure of 110 bars for ten days. Tilt angle θ was obtained by rotating the phase mask against the optical fiber and laser beam 19 . Transmission spectrum of resulted TFBG with θ=3.5° tilt angle is presented in Fig. 1 ...
