In this paper, the load and transverse strain were measured using polarization maintaining fiber Bragg grating (PMFBG) sensor. PMFBG sensor was fabricated using phase mask and Excimer laser. The reflected wavelength of PMFBG sensor had dual peaks due to intrinsic birefringence. To discover the polarization axes, peak sensitivity was measured under compression test. The signal characteristics of PMFBG sensor were also examined in embedding condition. The embedded PMFBG sensor in epoxy block was loaded for the load and transverse strain measurements. To align the polarization axes with loading axis, backing material was adhered to PMFBG sensor. This sensor was also embedded in laminated composites and measured the transverse strain.
Experiments showed that the PMFBG sensor could successfully measure the load and transverse strain. This PMFBG sensor is useful for the micro load sensor and the structures that require measuring transverse strain.
