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

Figure 3

(a) Micrographs of the original E-LPFG and etched E-LPFG. (b) Transmission spectra of the original E-LPFG and E-LPFG with a fiber diameter of ~ 21 μm [1].

(a)

(b)