Elasto-optically induced modulation of in-fiber grating

Strong effects due to uniaxial stress applied to an in-fiber grating reflection peak splits because of the elastooptically induced birefringence. The separation between the two peaks increases with the stress, and they broaden and shift. By modulating the pressure using a PZT disk at frequencies up to 1 MHz, modulation of the reflectivity, which varies with the wavelength within the grating reflection band, was obtained.<
>