The present invention relates to optical fuses, and more particularly to optical fiber lines including optical fuses. Optical fuse device is aimed to protect the telecommunication or any other fiber networks. Optical fuse device can be placed in an optical fiber line to allow protection of one or more components in an optical system from light over power situations where a light intensity in the optical system is above a predetermined threshold value. The present invention optical fuse device may find use in optical telecommunication systems, fiber laser systems, sensor systems, testing systems, and other light transmission applications where high intensity light signals or pulses may be present. Each optical fiber line includes two lead-in fibers having the optical fuse device optically coupled there between. The method of manufacturing includes bonding (e.g., splicing) a structure-forming fiber having a preferentially-etchable portion between two lead-in fibers and etching the structure-forming fiber to remove at least a portion of the preferentially-etchable portion and form an optical fuse device extending between the two lead-in fibers. In other embodiments, the structure forming fiber is bonded to a first lead-in fiber, axially etched to form an optical fuse precursor, and then the assembly is bonded to the second lead-in fiber
F.32 International patent
COBISS.SI-ID: 14854422The present invention relates to an in-line optical device, and more particularly to an in-line optical device adapted to be connected to an optical fiber. The in-line optical device is suitable for use in different in-line fiber-optics systems to provide interaction of the guided optical field with the surrounding medium or other photonics structure. The in-line optical device includes a field interaction region of an optically-transmissive material or at least the fiber core, a support structure spaced from the central axis having one or more radial openings; and a void between the support structure and the field interaction region, the void substantially surrounding the field interaction region. An in-line optical system includes a first and second lead-in optical fiber, and in-line optical device, which is coupled between both lead-in fibers. The method of manufacturing includes providing a structure-forming fiber with support structure forming portion, a field interaction region forming portion, and a preferentially-etchable portion. It also includes bonding the structure-forming fiber between both lead-in fibers to form a fiber assembly that is further etched. Etching is needed to remove the etchable portion in order to form an in-line optical device having a field interaction region with support structures.
F.32 International patent
COBISS.SI-ID: 14854934The present invention relates to optical sensors, and more particularly to optical fiber sensors and systems including them. The optical fiber sensor whit long active length is composed of a lead-in fiber that also forms the first FP semi-reflective surface, an outer (semi-conical) wall, a second FP semi-reflective surface, a gutter that surrounds the second FP semi-reflective surface, pedestal and a second lead-in fiber. The active length of fiber sensor is defined by gutter depth. The strain measurement system includes an optical fiber sensor adapted to be coupled to an object undergoing strain, the optical fiber sensor including a lead-in optical fiber and an optical element coupled thereto including s a signal processor coupled to the optical fiber sensor. Signal processor is operable to generate and pass a light signal into the lead-in optical fiber, receive a light signal reflected from at least the retracted surface of the optical element, and determine a strain applied to the object. The main advantage of the proposed sensor system is that cavity length and active length are separated by the gutter length in order to improve sensitivity. Method of manufacturing an optical fiber sensor includes a few possibilities to providing a structure-forming fiber; and micromachining the structure-forming fiber to produce an outer dimension, a pedestal, and a gutter surrounding the pedestal having a gutter depth defining an active region of length. The present invention also relates to measuring system in order to define signal interrogation technique in manner of coupling signal into in-line fiber and receiving of a reflected light signal, all that to determine strain applied to the object.
F.32 International patent
COBISS.SI-ID: 14854678