PRESSURE OR STRAIN SENSITIVE OPTICAL FIBER

摘要

Pressure sensitive optical fiber (11) having core means (15), at least a portion of which has a predetermined refractive index for transmitting light therethrough, cladding means adjacent the core means having a refractive index which is less than that of the core means, and concentric light transmissive means (22) adjacent the cladding means having refractive index which is greater than that of the cladding means and through which light passes in proportion to the amount of stress or strain induced in the fiber. Also, pressure sensors and methods for measuring forces or perturbations utilizing such fiber.