Journal
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
Volume 86, Issue 2, Pages 153-157Publisher
SPRINGER
DOI: 10.1007/s00339-006-3754-2
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We report on the fabrication of highly efficient fiber Bragg gratings (FBG) in non-photosensitive fibers based on nonlinear absorption of fs laser light. Up to 40 mm long gratings with a transmission of T = -25 dB at the Bragg reflection wavelength were obtained and their coupling constant determined by spectral analysis. Therefore, a phase mask scanning technique with appropriate control of the focus was established.
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