Spatial-phase-code division multiple access system with Fourier holography switch

K. Takasago, M. Takekawa, A. Shirakawa, F. Kannari

    Research output: Contribution to journalConference articlepeer-review


    A relatively simple scheme for the simultaneous routing of many independent signals among a number of transmitters (TXs) and receivers (Rxs) using spatial multiplexing with pseudorandom phase codes is proposed for Fourier holography switching. The system consists of Txs and Rxs sharing a single channel. With the routing information embedded within the decoding mask, the output beam is shifted by 200 μm. The ratio of the peak intensity at the routing plane in the case of unmatched masks to the matched is about 6. As to the pseudorandom phase mask, an M-sequence pattern is displayed on a linear spatial light modulator. Routed independently using a multiplexed hologram, two signals are decoded independently with a high signal-to-noise ratio.

    Original languageEnglish
    Pages (from-to)52-53
    Number of pages2
    JournalConference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS
    Publication statusPublished - 1997 Jan 1
    EventProceedings of the 1997 Conference on Lasers and Electro-Optics, CLEO - Baltimore, MD, USA
    Duration: 1997 May 181997 May 23

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Electrical and Electronic Engineering


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