Design and realization of long-period grating devices in conventional and high birefringence fibers and their novel applications as fiber-optic load sensors
L. Zhang et al., Design and realization of long-period grating devices in conventional and high birefringence fibers and their novel applications as fiber-optic load sensors, IEEE S T QU, 5(5), 1999, pp. 1373-1378
We report the design and fabrication of long-period fiber gratings with sin
gle and cascaded structures in conventional and high birefringence (hi-bi)
fibers using amplitude mask and point-by-point writing techniques. We also
report a novel application of long-period gratings produced in nonhigh-bire
fringence fiber as fiber-optic load sensors exhibiting very high transverse
strain sensitivity. Sensitivity some 800 times greater than previously rep
orted fiber Bragg grating (FBG) sensors has been achieved.