Accession Number : ADD017445

Title :   Technique to Prepare High-Reflectance Optical Fiber Bragg Gratings with Single Exposure In-Line or Fiber Draw Tower.

Descriptive Note : Patent, Filed 21 Jan 93, patented 21 Mar 95,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Askins, Charles G ; Friebele, Edward J

Report Date : 21 Mar 1995

Pagination or Media Count : 11

Abstract : A process for making an optical reflection grating in a glass fiber includes exposing all unjacketed optic fiber to a single writing pulse from a pair of interfering light beams that form an interference pattern in the fiber. A novel optical fiber has at least one optical grating with a preselected Bragg spacing in at least one region of the fiber, with a periodic modulation in its index of refraction, with high thermal stability and narrow linewidth. A process for making an array of optical reflection gratings in a glass fiber includes exposing a fiber to a plurality of writing pulse from a pair of interfering light beams that form an interference pattern in the fiber, where these pulses are applied sequentially as the fiber is drawn from a draw furnace. A novel optical fiber has a plurality of unspliced gratings with high thermal stability and narrow linewidth. jg

Descriptors :   *FIBER OPTICS, *OPTICAL PROPERTIES, *GRATINGS(SPECTRA), *GLASS FIBERS, *REFLECTANCE, *PATENTS, *BRAGG ANGLE, OPTICS, FIBERS, EXPOSURE(GENERAL), LIGHT, REFRACTIVE INDEX, THERMAL STABILITY, REFLECTION, REGIONS, PULSES, INTERFERENCE, PATTERNS, MODULATION, WRITING, FURNACES, SPECTRAL LINES

Subject Categories : Fiber Optics and Integrated Optics
      Refractory Fibers
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE