System and method for measuring a laser-induced damage threshold in an optical fiber
AssigneeThe Boeing Company
InventorOleg M. Efimov
Life of this patent
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Abstract
A system for measuring a laser-induced damage threshold in an optical fiber may include a lens to direct a first laser beam through a core of the optical fiber. The system may also include an optical arrangement to direct a second laser beam through an exterior surface of the optical fiber and into the core of the optical fiber at a preselected location of the optical fiber to provide a predetermined power density at the preselected location, wherein the optical arrangement causes the second laser beam to be directed into the optical fiber substantially completely around a perimeter of the optical fiber to provide the predetermined power density.
Claims30
A system for measuring a laser-induced damage threshold in an optical fiber, comprising
- a lens that directs a first laser beam through a core of the optical fiber;
- and
- an optical arrangement that directs a second laser beam through an exterior surface of the optical fiber and into the core of the optical fiber at a preselected location of the optical fiber providing a predetermined power density at the preselected location, wherein the optical arrangement directs the second laser beam into the optical fiber providing the predetermined power density.
A system for measuring a laser-induced damage threshold in an optical fiber, comprising
- an axicon;
- an opening formed in the axicon through which the optical fiber extends;
- a cell optically coupled to the axicon, wherein a portion of the optical fiber under test is contained within the cell and wherein the cell comprises:
- an input window to receive a laser beam from the axicon, wherein the axicon directs the laser beam through the input window of the cell and onto the optical fiber to provide a predetermined power density at a preselected location in a core of the optical fiber;
- and
- an immersion liquid contained in the cell, wherein the immersion liquid has a refractive index similar to a refractive index of a cladding of the optical fiber to permit a portion of the laser beam to pass through the cladding and into the core of the optical fiber.
A method for measuring a laser-induced damage threshold in an optical fiber, comprising:
- directing a first laser beam through a core of the optical fiber;
- and
- directing a second laser beam through an exterior surface of the optical fiber and into the core of the optical fiber at a preselected location of the optical fiber to provide a predetermined power density at the preselected location, wherein the second laser beam is directed into the optical fiber to provide the predetermined power density.
A method for measuring a laser-induced damage threshold in an optical fiber, comprising:
- directing a laser beam through an exterior surface of the optical fiber and into a core of the optical fiber at a preselected location of the optical fiber, wherein the laser beam is directed into the optical fiber to provide a predetermined power density at the preselected location in the core of the optical fiber;
- and
- increasing an energy level of the laser beam in predetermined steps to measure an energy level or threshold at which laser-induced damage occurs.
Dependencies are inferred from the claim text.