Figure 2
From: Ultra-fast polymer optical fibre Bragg grating inscription for medical devices
Measured reflection spectra of FBGs inscribed with different UV irradiation times in the POF and their growth post-irradiation. (a) Gratings recorded 10 s after inscription, (b) 1 h after inscription and (c) 2 weeks after inscription. (d) Growth of the normalized reflected peak power of FBGs written in 10 s, 0.3 s, 0.2 s and 7 ms within 2 weeks post-irradiation. The inset shows the end face of the fabricated single-mode POF.
