Abstract
This work presents a new sequential UV-writing procedure for fabricating long fiber Bragg grating (FBG) devices. To real-time accurately align the position of every exposed FBG section prior to UV exposure, a single-period reference fiber grating with strong refractive index modulation is probed by applying an interferometric side-diffraction method to measure the grating phase as the position reference. In this way the overlapped FBG sections can be connected section-by-section without obvious phase errors, even when the written index-modulation is weak.
Original language | English |
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Pages (from-to) | 3795-3801 |
Number of pages | 7 |
Journal | Optics Express |
Volume | 13 |
Issue number | 10 |
DOIs | |
State | Published - 15 05 2005 |
Externally published | Yes |