Fabrication of fiber Bragg gratings with 267 nm femtosecond radiation.
Strong high-quality fiber Bragg gratings with photoinduced refractive-index modulation of more than 10-(3) were written in a Corning SMF-28 fiber, a P(2)O5-doped-core fiber and a pure-silica-core fluorine-doped-cladding fiber by third-harmonic radiation (267 nm, 150 fs and 1.2-1.8x1011 W/cm(2)) of a femtosecond Ti:sapphire laser using a phase mask. We compare the 267-nm photosensitivity responses with the results of irradiation by 193-nm ArF and 157-nm F(2) excimer lasers. The dependence of the refractive-index change on the exposure dose and the annealing characteristics of the fabricated gratings are typical for Type-I UV-written fiber gratings.
Zagorulko
K
K
Kryukov
P
P
Larionov
Yu
Y
Rybaltovsky
A
A
Dianov
E
E
Chekalin
S
S
Matveets
Yu
Y
Kompanets
V
V