A Low-Cost High-Temperature Sensor Based on Long-Period Fiber/Microfiber Gratings by Local Fictive Temperature Modification

Figure 6

(a) Transmission spectrum of LPMFGs at different temperatures ranging from 30°C to 80°C; (b) corresponding relationships between temperature and the dip wavelength shift and the optical microscope image of modification zone of fabricated LPMFGs as shown in the inset.

(a)

(b)