A method of making a microstructured optical fiber including loading the core and cladding materials of the fiber with hydrogen and deuterium at a loading temperature; annealing the fiber at a selected temperature T.sub.anneal; pumping the fiber with radiation; and reducing the temperature of the fiber and storing the fiber at the reduced temperature before the step of pumping the fiber; and wherein the method allows the hydrogen and the deuterium to become bound to the core material and the cladding material.

The present disclosure relates to a fiber and a laser probe assembly with a probe tip that houses the fiber. In certain aspects, the fiber includes a core and an outer cladding surrounding the core. The core is configured to transmit a laser light beam while the core and the outer cladding are both configured to transmit an illumination light. Using a fiber that is configured to transmit a laser light beam as well as an illumination light allows for a more compact fiber and probe tip, allowing for medical procedures that require a narrower probe.

A plastic optical fiber including a first cladding; a first core forming a first sea portion inside the first cladding; and a first island portion formed inside the first core with at least an outer periphery having a lower refractive index than the first sea portion, wherein the first core includes a polymethyl methacrylate-based resin.

Athermal glasses and athermal systems for infrared optical components and systems are disclosed.

A plastic optical fiber including a first cladding; a first core forming a first sea portion inside the first cladding; and a first island portion formed inside the first core with at least an outer periphery having a lower refractive index than the first sea portion, wherein the first core includes a polymethyl methacrylate-based resin.

The present disclosure provides a method for modification of surface of an initial optical fiber preform. The initial optical fiber preform is manufactured using at least one preform manufacturing process. The surface of the initial optical fiber preform is treated with 50-70 liters of chlorine per square meter of the surface of the initial optical fiber preform. The surface of the initial optical fiber preform is flame polished using a flame polishing module. The treatment of the surface of the initial optical fiber preform with chlorine and flame polishing of the surface of the initial optical fiber preform collectively converts the initial optical fiber preform into a modified optical fiber preform.

An optical waveguide is configured such that when electromagnetic radiation enters a first end face of an optical core, an initial portion of the electromagnetic radiation exits the optical core via a peripheral surface, and a final portion of the electromagnetic radiation, remaining in the optical core after the initial portion of the electromagnetic radiation exits the optical core, exits the optical core via a second end face.

Reflectometric vibration measurement system to monitor multiphase flows in production wells or pipelines using multimode fibers comprising: a sensing multimode optical fiber; an optical source with at least one fiber output port, which generates optical pulses which are to be sent to the sensing fiber; an optical receiver with at least one multimode fiber input port; an optical device with at least 3 multimode fiber ports, in which one port is connected to the optical source, one port to the optical receiver, and one port to the sensing multimode fiber; a system for processing the output signals from the optical receiver, further comprising more than one spatial mode filter. A process for reconfiguring an optical reflectometry system which has already been installed in a monitoring structure is also described.

A method of making a microstructured optical fiber including loading the core and cladding materials of the fiber with hydrogen and deuterium at a loading temperature; annealing the fiber at a selected temperature T.sub.anneal; pumping the fiber with radiation; and reducing the temperature of the fiber and storing the fiber at the reduced temperature before the step of pumping the fiber; and wherein the method allows the hydrogen and the deuterium to become bound to the core material and the cladding material.

A system for additively manufacturing an object comprises feedstock-line supply, delivery guide, and curing mechanism. The feedstock-line supply dispenses a feedstock line that comprises elongate filaments, a resin that covers the elongate filaments, and at least one optical modifier that is interspersed among the elongate filaments. The delivery guide is movable relative to a surface, receives the feedstock line, and deposits it along a print path. The curing mechanism is directs electromagnetic radiation at the exterior surface of the feedstock line after it is deposited along the print path. When the electromagnetic radiation strikes the outer surface of at least one optical modifier, the optical modifier causes the electromagnetic radiation to irradiate, in the interior volume of the feedstock line, the resin that, due at least in part to the elongate filaments, is not directly accessible to the electromagnetic radiation, incident on the exterior surface of the feedstock line.