Secure ultrafast communication with spatial-temporal converters.

An encrypted database interfaced with an ultrafast secure data communication system using spatial-temporal converters is proposed. The original spatial signal is optically encrypted, and the encrypted signal is holographically stored in a storage medium such as photorefractive materials. The spatially encrypted signal is sampled to avoid the overlap of each datum at the receiver. The sampled data are converted into a temporal signal to transmit the information through an optical fiber. At the receiver the temporal signal is converted back into the spatially encrypted signal. Retrieval of the original data can be achieved when the correct phase key is used in the decryption system. We developed an expression for encrypted output and decrypted data. We numerically evaluate the effect of sampling the spatially encrypted signal on the quality of the decrypted data.

[1]  Tsuyoshi Konishi,et al.  Ultrafast image transmission by optical time-to-two-dimensional-space-to-time-to-two-dimensional-space conversion , 1999 .

[2]  B Javidi,et al.  Optical image encryption based on input plane and Fourier plane random encoding. , 1995, Optics letters.

[3]  B Javidi,et al.  Encrypted optical memory system using three-dimensional keys in the Fresnel domain. , 1999, Optics letters.

[4]  Y Fainman,et al.  Spatial temporal wave mixing for space time conversion. , 1999, Optics letters.

[5]  D Psaltis,et al.  Optical network for real-time face recognition. , 1993, Applied optics.

[6]  G Unnikrishnan,et al.  Optical encryption system that uses phase conjugation in a photorefractive crystal. , 1998, Applied optics.

[7]  J P Heritage,et al.  Encoding and decoding of femtosecond pulses. , 1988, Optics letters.

[8]  Bahram Javidi,et al.  Optical pattern recognition for validation and security verification , 1994 .

[9]  Y Fainman,et al.  All-optical parallel-to-serial conversion by holographic spatial-to-temporal frequency encoding. , 1995, Optics letters.

[10]  N Yoshikawa,et al.  Binary computer-generated holograms for security applications from a synthetic double-exposure method by electron-beam lithography. , 1998, Optics letters.

[11]  Y. Mazurenko,et al.  Holography of wave packets , 1990 .

[12]  Bahram Javidi,et al.  Influence of a perturbation in a double phase-encoding system , 1998 .

[13]  D M Marom,et al.  Analysis of spatial-temporal converters for all-optical communication links. , 1998, Applied optics.

[14]  A. Weiner,et al.  Time-to-space mapping of femtosecond pulses. , 1994, Optics letters.

[15]  Andrew M. Weiner,et al.  Femtosecond spectral holography , 1992 .