Speckle noise is a well-documented problem on coherent imaging techniques like Digital Holography. A method to reduce the speckle noise level is presented, based on introducing a Digital Micromirror Device to phase modulate the illumination over the object. Multiple holograms with varying illuminations are recorded and the reconstructed intensities are averaged to obtain a final improved image. A simple numerical resampling scheme is proposed to further improve noise reduction. The obtained results demonstrate the effectiveness of the hybrid approach.

In this paper the measurement of chromatic dispersion in a novel Side-hole PCF is reported. We chose a simple technique based on a Michelson interferometer. The results open the possibility of tunable chromatic dispersion compensators.

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