All-optical control of Bragg grating in semiconductor-coated D-shaped fiber.
A Bragg grating was fabricated in a D-shaped fiber that was subsequently coated with an alpha-Si:H semiconductor film. The reflected spectrum was optically controlled by means of evanescent coupling, shifting to shorter wavelengths with increased control-light power. The effective nonlinearity of the fiber was 2.0 x 10(-10) cm(2)/W . The device was optically tuned by 4.3 x 10(-4) nm/mW , leading to 54% (>3-dB) depth modulation for 230 mW of power.
Ribeiro
R M
RM
Kawase
L R
LR
Margulis
W
W
Lesche
B
B
Sahlgren
B
B
Stubbe
R
R
Kleveby
K
K