Sensing and Demodulation of Special Long-Period Fiber Gratings Induced by Scanning CO_𝟐 Laser Pulses

Figure 1

(a) Schematic diagram of the setup for fabricating the LPFGs using CO₂ laser [1]. (b) Transmission spectrum of the LPFG with grating period of 630 μm and grating length of 37.8 mm [2].

(a)

(b)