Dual random phase encoding: a temporal approach for fiber optic applications.

We analyze the dual random phase encoding technique in the temporal domain to evaluate its potential application for secure data transmission in fiber optic links. To take into account the optical fiber multiplexing capabilities, the noise content of the signal is restricted when multiple channels are transmitted over a single fiber optic link. We also discuss some mechanisms for producing encoded time-limited as well as bandwidth-limited signals and a comparison with another recently proposed technique is made. Numerical simulations have been carried out to analyze the system performance. The results indicate that this multiplexing encryption method could be a good alternative compared with other well-established methods.

[1]  José Azaña,et al.  Experimental demonstration of real-time Fourier transformation using linearly chirped fibre Bragg gratings , 1999 .

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

[3]  Yunlong Sheng,et al.  Optical implementation of image encryption using random phase encoding , 1996 .

[4]  Christian Cuadrado-Laborde.  Time-variant signal encryption by lensless dual random phase encoding applied to fiber optic links. , 2007, Optics letters.

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

[6]  Bahram Javidi,et al.  Fully phase encrypted image processor , 1999 .

[7]  B Javidi,et al.  Error-reduction techniques and error analysis for fully phase- and amplitude-based encryption. , 2000, Applied optics.

[8]  Myrian Tebaldi,et al.  Multiplexing encrypted data by using polarized light , 2006 .

[9]  Jingjuan Zhang,et al.  A lensless optical security system based on computer-generated phase only masks , 2004 .

[10]  Osvaldo J. Trabocchi,et al.  Fractional Fourier transform applied to spatial filtering in the Fresnel domain , 1995 .

[11]  Myrian Tebaldi,et al.  Multiplexing encryption–decryption via lateral shifting of a random phase mask , 2006 .

[12]  Myrian Tebaldi,et al.  Multiple image encryption using an aperture-modulated optical system , 2006 .

[13]  N. K. Berger,et al.  Time-lens-based spectral analysis of optical pulses by electrooptic phase modulation , 2000 .

[14]  A. Papoulis.  PULSE COMPRESSION, FIBER COMMUNICATIONS, AND DIFFRACTION : A UNIFIED APPROACH , 1994 .

[15]  G. Unnikrishnan,et al.  Optical encryption by double-random phase encoding in the fractional Fourier domain. , 2000, Optics letters.

[16]  Kehar Singh,et al.  Double random fractional Fourier domain encoding for optical security , 2000 .

[17]  B Javidi,et al.  Spread-space spread-spectrum technique for secure multiplexing. , 2007, Optics letters.

[18]  A. Lohmann,et al.  Temporal filtering with time lenses. , 1992, Applied optics.

[19]  B. Kolner.  Space-time duality and the theory of temporal imaging , 1994 .

[20]  Jingjuan Zhang,et al.  Double random-phase encoding in the Fresnel domain. , 2004, Optics letters.