Abstract
At wavelengths slightly shorter than the normal resonance for a fiber Bragg grating, radiation can be coupled into cladding and radiation modes that become visible external to the fiber. We describe experimental measurements on a fiber Bragg grating under broadband illumination, showing the axial variation and angular distribution of side-scattered radiation. The scattering signal can locate the grating position subject to an offset in the backscatter direction. The spectrum of scattered radiation is consistent with a published theoretical model of mode coupling by a grating in a finite cladding fiber. © 2004 Optical Society of America.
Original language | English |
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Pages (from-to) | 3310-3314 |
Number of pages | 5 |
Journal | Applied Optics |
Volume | 43 |
Issue number | 16 |
DOIs | |
Publication status | Published - 1 Jun 2004 |