Localized waveguide formation in germanosilicate fiber transmitting femtosecond IR pulses


Journal Article

Transmission of intense femtosecond 825 nm pulses progressively produces a waveguide at the entrance of a heavily Ge-doped silicate fiber. The waveguide behaves as a multimillimeter long-fiber bandpass filter that scatters away light with wavelengths shorter or longer than 850 nm. This phenomenon has been correlated with the ∼800 nm photosensitivity producing type I-IR fiber Bragg gratings in side-written lightly Ge-doped silicate fibers and low-loss waveguides in pure silica bulk glass. A model incorporating color center formation is proposed to understand the underlying mechanism. © 2008 Optical Society of America.

Full Text

Duke Authors

Cited Authors

  • Tu, H; Koh, YL; Marks, DL; Boppart, SA

Published Date

  • January 1, 2008

Published In

Volume / Issue

  • 25 / 2

Start / End Page

  • 274 - 278

International Standard Serial Number (ISSN)

  • 0740-3224

Digital Object Identifier (DOI)

  • 10.1364/JOSAB.25.000274

Citation Source

  • Scopus