Holographic phase calibration for fiber interferometric imaging array

A new approach based on holographic technique was proposed with photorefractive crystal for phase error calibration in fiber interferometric imaging arrays. The principle of fiber interferometric imaging arrays and the transmission of phase information were discussed first. The model of phase error was set up for a one dimension linear array system. The particular process of holographic phase calibration with photorefractive crystal was as follows: the shutter before the reference beam and the shutter before the CCD camera were kept on and off by turns, which respectively made for the diffractive grating writing formed by interfering of fiber beam and reference beam, and for the diffraction and phase shift of the fiber beam. Finally the imaging simulation using un-calibrated, the purposed approach and the redundant baseline spacing calibration corresponded was compared based on the 1D fiber interferometric array with phase errors.