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Proceedings Paper

Secure optical communication system based on tunable fiber Bragg grating arrays
Author(s): Hailei Xu; Jinfang Zhou; Menghu Cao; Kangsheng Chen
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Paper Abstract

Superstructured fiber Bragg grating (FBG) technology has emerged as an attractive means to produce compact, and potentially low-cost in-fiber devices for a variety of lightwave applications. In this paper, a secure optical communication system based on tunable FBG arrays is described. Utilizing the inherent characteristics of FBG array to decompose broadband pulses simultaneously in wavelength and time, one broadband light pulse reaching a series of different Bragg gratings may be split into a number of separated pulses, each with different wavelength and is positioned at different time. To recover the original pulse, an inverted grating array is needed at the receiver side, i.e., the transmission is secure in case that the exact structure of the FBG array is unknown. Some of the factors affecting the process of encryption/decryption are indicated. To further increase the security of the system, theories about bent functions are presented and applied to generate bent sequences so as to charge the modes of FBG arrays because of the bent functions' excellent cryptographic properties. Simulations results are presented and analyzed to show the feasibility of the system. The paper is concluded with a discussion of the advantages for such an optical encryption/decryption system.

Paper Details

Date Published: 20 January 2006
PDF: 7 pages
Proc. SPIE 6027, ICO20: Optical Information Processing, 60271U (20 January 2006); doi: 10.1117/12.668185
Show Author Affiliations
Hailei Xu, Zhejiang Univ. (China)
Jinfang Zhou, Zhejiang Univ. (China)
Menghu Cao, Zhejiang Univ. (China)
Kangsheng Chen, Zhejiang Univ. (China)


Published in SPIE Proceedings Vol. 6027:
ICO20: Optical Information Processing

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