Open AccessNovel characterization technique with 05 ppm spatial accuracy of fringe period in Bragg gratings
Author(s) -
Mattias L. Åslund,
John Canning,
L. Poladian,
C. Martijn de Sterke
Publication year - 2003
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.11.000838
Subject(s) - optics , fiber bragg grating , diffraction , chirp , materials science , interference (communication) , phase (matter) , bragg's law , diffraction grating , diffraction efficiency , position (finance) , spatial frequency , image resolution , physics , optical fiber , laser , computer science , telecommunications , channel (broadcasting) , quantum mechanics , finance , economics
We demonstrate a novel method that can detect period fluctuations of periodic structures such as fiber Bragg gratings at an accuracy of approximately 0.5 ppm. These fluctuations can consist of chirp rates, phase shifts etc. The method can also be used to measure phase masks or work as a position control device with spatial resolution in the order of 10 nm. The technique is a modified side diffraction method with interference between two diffraction orders.