Biomedical subjects

Jiasen Zhang

Publications and source records attributed to Jiasen Zhang.

3 recordsLinked to original sources

PubMed2006

Encrypted holographic memory using an encoded reference wave.

A secure holographic memory system is proposed by use of an encoded reference beam. The reference beam is encrypted by a fiber-optic faceplate, which serves as a phase mask. There are seven keys in the system including the position and direction of the fiber bundle and the direction of the incident beam. The experiment shows that the total key length is larger than 1.8 x 1019. The method can be used directly in a shift-multiplexing system with high selectivity.

Journal Article↗

PubMed2005

Shift multiplexing by planar waveguide referencing.

We present a new method with which to implement shift multiplexing by planar waveguide referencing. In this method, a planar waveguide is used to steer the reference beam, and we implement shift multiplexing by shifting the recording medium. A spatial selectivity as high as 1.1 microm is obtained. By using waveguide referencing we can make a compact and simple holographic system.

Journal Article↗

PubMed2004

Method of hologram multiplexing by use of a fiber bundle with rotary movement.

A simple method of rotating an optical fiber bundle is presented to apply the random-pattern referencing scheme to hologram multiplexing. In the theoretical study, a dependence of the diffraction efficiency on the number of spatial frequencies in the reference pattern is estimated with the Bragg diffraction theory. In the experiment, hologram multiplexing is performed in which 30 holograms are recorded in a LiNbO3 crystal and are read out by rotating a fiber bundle. The result shows that this simple approach enables us to perform the hologram multiplexing and also contributes to the building of a compact optical setup.

Journal Article↗