Abstract
A Bragg grating was fabricated in a D-shaped fiber that was subsequently coated with an 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 . The device was optically tuned by , leading to 54% depth modulation for 230 mW of power.
© 1999 Optical Society of America
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