OPTICAL FIBER PRESSURE SENSOR AND METHOD OF SENSING THEREOF

• Main Authors: GHAZALI, Ahmad Riza, MOKHTAR, Mohd Ridzuan, MD ZAHIR, M Hafizal, AB RASHID, Hairul Azhar, ABD RAHIM, Mohamad Faizal bin, AZMAN, Mohd Fahmi
• Format: Patent
• Language: English; French; German
• Published: 15.02.2023
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MEASURING; MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER,MECHANICAL EFFICIENCY, OR FLUID PRESSURE; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS; TESTING

An optical fiber for measuring pressure comprising a core for guiding optical signals along a length of the core and a cladding layer including a plurality of stress applying parts disposed around the core. The plurality of stress applying parts are disposed parallel to and symmetrically around the core to induce intensified symmetric shear stress upon application of external pressure while preventing birefringence. The optical fiber provides improved strain sensitivity compared to a standard single-mode optical fiber.