ULTRA-SENSITIVE FORCE SENSING BASED ON EVANESCENT LIGHT

摘要

Methods, structures, devices and systems are disclosed for implementing a fiber optic force sensing transducer. In one aspect, an exemplary fiber optic force sensing transducer device includes an optical fiber coated by at least one layer of a polyelectrolyte material that utilizes the movement of optical structures coupled to the external polyelectrolyte layer in an evanescent field produced by the optical fiber to detect forces imposing on the fiber. In one aspect, an optical sensing device includes an optical waveguide that internally guides light, one or more layers formed outside the optical waveguide within an evanescent field of the guided light in the optical waveguide, and one or more optical structures coupled to the one or more layers in the evanescent field to emit light based on interaction with the evanescent field to indicate a position of an optical structure relative to an external surface of the optical waveguide.

主权项

1. An optical-mechanical force-sensing device, comprising:
an optical waveguide operable to internally guide light; one or more compressible coatings formed on a surface of the optical waveguide, and configured to be substantially within an evanescent field of the guided light of the optical waveguide; and one or more optical structures attached to an external surface of the one or more compressible coatings in the evanescent field, wherein each of the one or more optical structures is configured to emit light based on an interaction with the evanescent field to indicate a displacement of the optical structure relative to the surface of the optical waveguide caused by an external force exerted on the optical structure.