title: Single-beam data encoding using a holographic angular multiplexing technique.
abstract: We propose a novel configuration for angular multiplexing holographic encoding in which the signal beam and the reference beam are combined into a single beam. By using a spatial light modulator based on twisted nematic liquid crystals, the signal and the reference beams are modulated in amplitude mode and phase mode, respectively. The multiplexed interference patterns with the reference beams of different incident angles are recorded near the Fourier transform plane, and then the signals are selectively reconstructed by the corresponding reference beam. Both the simulation and the experiment of single-beam angular multiplexed holography are performed with consistent results. Compared with the traditional angular multiplexing holographic recording system, the single-beam configuration is more compact, easier to adjust, and less sensitive to the vibration of the environment. Therefore, it will be more attractive for potential applications in many fields, such as high-density signal recording and data encryption.
authors.affiliation: Department of Electronic Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon Tong, Kowloon, Hong Kong, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Jia
authors.forename: Zhongyu
authors.initials: Z
authors.lastname: Chen
authors.forename: Fung Jacky
authors.initials: FJ
authors.lastname: Wen
authors.forename: Changhe
authors.initials: C
authors.lastname: Zhou
authors.forename: Yuk Tak
authors.initials: YT
authors.lastname: Chow
authors.forename: Po Sheun
authors.initials: PS
authors.lastname: Chung