TY - JOUR
AU - Nemarich, Christopher P.
AB - Long-period gratings have recently gained popularity as versatile optical fiber sensing elements that are simple and economical to fabricate and demodulate. Long-period gratings are periodic photoinduced structures in fiber cores that couple light from guided to cladding modes. We discuss the applications of these devices to strain measurements in high-performance materials and structures. Experimental results from a preliminary loading test carried out on a reinforcing-bar commonly used in civil structures are presented. The temperature cross-sensitivity of long-period grating-based strain sensors is analyzed and two methods to overcome this limitation are presented. We also demonstrate that strain-insensitive long-period gratings can be fabricated in standard optical fibers. The application of such gratings to temperature measurements in the presence of actively varying axial strain is discussed. Preliminary results indicate that long-period gratings hold tremendous potential for health monitoring of advanced materials and structures.
TI - Grating-based optical fiber sensors for structual analysis
JF - Proceedings of SPIE
DO - 10.1117/12.275760
DA - 1997-06-06
UR - https://www.deepdyve.com/lp/spie/grating-based-optical-fiber-sensors-for-structual-analysis-WKJM5oNXpv
SP - 390
EP - 399
VL - 3042
IS - 1
DP - DeepDyve
ER -