Accession Number : ADD015757

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

Descriptive Note : Patent Application, Filed 21 Jan 93,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

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

Report Date : 21 Jan 1993

Pagination or Media Count : 25

Abstract : A process for making an optical reflection grating in a glass fiber includes exposing an 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. (Author)

Descriptors :   *PATENT APPLICATIONS, *GRATINGS(SPECTRA), *OPTICAL EQUIPMENT, *REFLECTANCE, *GLASS FIBERS, LASER BEAMS, LIGHT, PULSES, INTERFERENCE, MODULATION, REFRACTIVE INDEX, THERMAL STABILITY

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

Distribution Statement : APPROVED FOR PUBLIC RELEASE