Fabrication of long-period optical fiber gratings by use of ion implantation.
We report the fabrication of long-period optical fiber gratings by use of a refractive-index increase induced by ion implantation. Helium ions were implanted in an optical fiber core through a metal mask that had a 170-microm -pitch grating with spacing of 60 microm . We obtained a wavelength-dependent effective transmission loss by use of the grating.
M
M
Fujimaki
Y
Y
Ohki
J L
JL
Brebner
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S
Roorda