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Deep ultraviolet femtosecond laser tuning of fiber Bragg gratings |
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| Authors: | Qiying Chen Kevin P. Chen Suwas Nikumb |
| Affiliation: | a Department of Physics and Physical Oceanography, Memorial University of Newfoundland, 283 Prince Phillips Drive, St. John’s, Canada NL A1B 3X7 b Department of Electrical Engineering, University of Pittsburgh, 3700 O’Hara Street, Pittsburgh, PA 15261, USA c StockerYale Inc., Salem, NH 03079, USA d Integrated Manufacturing Technologies Institute, National Research Council of Canada, 800 Collip Circle, London, Canada ON N6G 4X8 |
| Abstract: | A deep ultraviolet femtosecond laser operating at wavelength 258 nm was demonstrated to be effective in trimming fiber Bragg gratings in telecommunication fibers. A smooth tunable resonance wavelength shift of up to 0.52 nm has been observed, corresponding to a refractive index change of ∼5 × 10−4 after an accumulated laser fluence of 63.3 kJ/cm2 at a single pulse fluence of 124 mJ/cm2. The ultrafast laser enhancement of ultraviolet photosensitivity response and modification of anisotropic index profile in silica fiber is a powerful technique to precise control of the performance of fiber Bragg grating devices for applications in optical filtering and polarization mode dispersion management. |
| Keywords: | 42.81 81.40 |
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