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Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 19,
  • Issue 10,
  • pp. 1569-
  • (2001)

Modified Talbot Interferometer for Fabrication of Fiber-Optic Grating Filter Over a Wide Range of Bragg Wavelength and Bandwidth Using a Single Phase Mask

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Abstract

A technique involving a compact apparatus that combines the phase mask and two-beam interferometric techniques is presented. It involves the use of a phase mask to diffract the ultraviolet (UV) beam and a cylindrical lens combined with a pair of mirrors to produce two symmetric virtual line sources of UV light. Bragg wavelength and bandwidth of the fiber gratings can be controlled with a simple translation of the fiber and/or the phase mask. Using a 40-mw continuous-wave frequency-doubled argon-ion laser at 244 nm and a single phase mask, a series of chirped fiber gratings with the Bragg wavelength in a wide range around 600 nm and 1300 nm are fabricated in hydrogen-loaded ordinary fibers.

[IEEE ]

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