The present invention relates to a fiber optic sensor, a method of manufacturing the same, and a vibroscope using the same. A fiber optic sensor according to an embodiment of the present invention includes: an optical cable; an optical fiber taken out of the optical cable and provided with a fiber Bragg grating (FBG); a mold housing as a case into or to which the optical cable and the optical fiber are partially inserted and fixed, the mold housing including an optical cable accommodation groove to accommodate the optical cable, an optical fiber accommodation hole extending from the optical cable accommodation groove to accommodate the optical fiber, and a coating agent introduction hole communicated with the optical fiber accommodation hole so as to allow fluid to flow therebetween from an outer side of the mold housing so that a liquid-type coating agent permeates via the optical fiber accommodation hole; and a coating layer filling the optical fiber accommodation hole and the coating agent introduction hole and formed on an outer circumference of the optical fiber including the FBG and a surface of the mold housing.

Apparatus and methods for remotely laying cable. A crawler comprises a propulsion means for moving the crawler along a surface. A controller stores the route followed by the crawler. As the crawler moves along the surface a cable is fed onto the surface. A fastener is then used to affix the cable to the surface.

The present disclosure relates to a passive fiber optic cabinet and a system for detecting a state of a door of a passive fiber optic cabinet. A passive fiber optic cabinet is provided, comprising: a housing; a door coupled to the housing and configured to be switchable between an open state and a closed state; a switch sensor module including a detection fiber Bragg grating (FBG) sensor and a stress applying mechanism corresponding to the detection FBG sensor, the stress applying mechanism configured to apply a stress o the detection FBG sensor, one of the detection FBG sensor and the stress applying mechanism being positioned at the door, and the other of the detection FBG sensor and the stress applying mechanism being positioned at the housing.

An optical fiber mold device has a first portion that includes a base layer having a longitudinal feature configured to receive an optical fiber. At least one second portion is disposed over the base layer. The second portion has a center wall and front and back end walls. The center wall, the front end wall, and the back end wall form a mold cavity. At least one first hole is disposed in the mold cavity and is configured to allow mold material to enter the mold cavity. At least one second hole in the mold cavity is configured to allow air displaced by the mold material to exit the mold cavity.

An optical connection structure includes a PLC that is an optical waveguide chip including an optical waveguide and at least one groove formed on a substrate, and at least one optical fiber that is fitted into the at least one groove of the PLC. The PLC includes the optical waveguide, at least one grating coupler that is optically connected to the optical waveguide, and the at least one groove formed at a position in a vicinity of the at least one grating coupler in a cladding layer in which the optical waveguide is formed. An optical fiber of the at least one optical fiber is fitted into a groove of the at least one groove such that an end surface of the optical fiber is located in a vicinity of a grating coupler of the at least one grating coupler, the optical fiber being optically connected to the grating coupler.

A lightweight stacked optical waveguide using two plastic substrates having nano-structure gratings and a single glass substrate sandwiched between them. The nano-structure gratings face each other, and are each encapsulated within the optical waveguide. The two plastic substrates are each adhesively secured to the central glass substrate rather than to each other to provide sufficient securing strength and precisely establish and maintain an air gap between the substrates. The thickness of the plastic substrates and the glass substrate are selected such that the stacked optical waveguide is lightweight, but also has sufficient drop performance. The stacked optical waveguide can be efficiently manufactured as the adhesive bonds a plastic substrate to a glass substrate.

An apparatus has a cassette configured to hold optical fiber comprising one or more optical sensors. The cassette has a spool configured to one or more of extract and retract the optical fiber from the cassette. A pre-strain mechanism is configured to apply a predetermined pre-strain to the one or more optical sensors. An optical fiber installation tool is configured to mount the optical fiber comprising the one or more pre-strained optical sensors to a surface.

An apparatus includes an installation tool for attaching an optical fiber to a structure. The tool includes a body. One or more contact portions are supported by the body and configured to secure the optical fiber. An adhesive dispenser is disposed proximate the body. The adhesive dispenser is configured to dispense at least one adhesive to the optical fiber and the structure. A dispenser controller is operatively coupled to the adhesive dispenser. The dispenser controller is configured to control the adhesive dispenser.

A lightweight stacked optical waveguide using two plastic substrates having nano-structure gratings and a single glass substrate sandwiched between them. The nano-structure gratings face each other, and are each encapsulated within the optical waveguide. The two plastic substrates are each adhesively secured to the central glass substrate rather than to each other to provide sufficient securing strength and precisely establish and maintain an air gap between the substrates. The thickness of the plastic substrates and the glass substrate are selected such that the stacked optical waveguide is lightweight, but also has sufficient drop performance. The stacked optical waveguide can be efficiently manufactured as the adhesive bonds a plastic substrate to a glass substrate.

Various techniques are provided for manufacturing an optical connector. In one example, a technique may include applying an optical adhesive to a first end of the optical fiber, translating the optical fiber towards a lens to at least partially adhere the end of the optical fiber to the lens by the optical adhesive, and suspending the lens from the optical fiber to align a center of gravity of the lens with an optical path of the optical fiber to maintain optical beam power loss below a power loss threshold. Additional methods, systems, and apparatus are also provided.