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Optical Materials Express

Optical Materials Express

  • Editor: David J. Hagan
  • Vol. 2, Iss. 11 — Nov. 1, 2012
  • pp: 1663–1670

Role of hydrogen loading and glass composition on the defects generated by the femtosecond laser writing process of fiber Bragg gratings

Neil Troy, Christopher W. Smelser, and Denise M. Krol  »View Author Affiliations

Optical Materials Express, Vol. 2, Issue 11, pp. 1663-1670 (2012)

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The creation of fiber Bragg gratings (FBGs) in optical fibers by laser irradiation causes the formation of defects in the modified glass. We have used confocal fluorescence spectroscopy to identify the location and types of defects formed after writing FBGs with the femtosecond laser phase mask technique. Our results show that non-bridging oxygen hole centers (NBOHCs) and self-trapped excitons (Eδ’) are formed throughout all-silica core Sumitomo Z-fiber. Similar defects are observed for Ge-doped silica fiber, Corning SMF-28, but in this case the relative concentrations of NBOHC and Eδ’ vary from the core to the cladding. In both fibers, hydrogen loading prior to irradiation appears to passivate the defects except in the Ge-doped core where the NBOHC defects persist.

© 2012 OSA

OCIS Codes
(050.0050) Diffraction and gratings : Diffraction and gratings
(160.2750) Materials : Glass and other amorphous materials
(230.1480) Optical devices : Bragg reflectors
(320.2250) Ultrafast optics : Femtosecond phenomena
(320.7140) Ultrafast optics : Ultrafast processes in fibers
(350.3390) Other areas of optics : Laser materials processing

ToC Category:
Materials for Fiber Optics

Original Manuscript: August 7, 2012
Revised Manuscript: October 16, 2012
Manuscript Accepted: October 17, 2012
Published: October 25, 2012

Virtual Issues
Specialty Optical Fibers (2012) Optical Materials Express

Neil Troy, Christopher W. Smelser, and Denise M. Krol, "Role of hydrogen loading and glass composition on the defects generated by the femtosecond laser writing process of fiber Bragg gratings," Opt. Mater. Express 2, 1663-1670 (2012)

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