OPTICAL FIBER COUPLED PHOTONIC CRYSTAL SLAB STRAIN SENSOR, SYSTEM AND METHOD OF FABRICATION AND USE

摘要

The present disclosure is generally directed to a strain sensor, system and method of fabrication and use that includes an optical fiber, an optical signal generator that transmits an optical signal through the optical fiber, at least two photonic crystal slabs within the optical fiber separated by a first segment of optical fiber, a photo-detector that detects a reflected optical signal from the at least two photonic crystal slabs, and a processor that computes a mechanical strain over the first segment of optical fiber based on the reflected optical signal detected by the photo-detector.

主权项

1. A photonic crystal strain sensor, comprising:
an optical fiber having a first end and a second end; and at least one pair of photonic crystal lattices disposed within the optical fiber between the first end and the second end of the optical fiber and wherein a first photonic crystal lattice of the at least one pair is separated from a second photonic crystal lattice of the at least one pair by a segment of the optical fiber, wherein each of the at least one pair of photonic crystal lattices includes a plurality of holes extending from a first surface to a second surface of the respective photonic crystal lattice, wherein the first surface and the second surface of each of the at least one pair of photonic crystal lattices are arranged to be orthogonal or substantially orthogonal to an optical axis of the optical fiber.