Spatial-phase code-division multiple-access system with multiplexed Fourier holography switching for reconfigurable optical interconnection

Kazuya Takasago, Makoto Takekawa, Atsushi Shirakawa, Fumihiko Kannari

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

A new, to our knowledge, space-variant optical interconnection system based on a spatial-phase code-division multiple-access technique with multiplexed Fourier holography is described. In this technique a signal beam is spread over wide spatial frequencies by an M-sequence pseudorandom phase code. At a receiver side a selected signal beam is properly decoded, and at the same time its spatial pattern is shaped with a Fourier hologram, which is recorded by light that is encoded with the same M-sequence phase mask as the desired signal beam and by light whose spatial beam pattern is shaped to a signal routing pattern. Using the multiplexed holography, we can simultaneously route multisignal flows into individually specified receiver elements. The routing pattern can also be varied by means of switching the encoding phase code or replacing the hologram. We demonstrated a proof-of-principle experiment with a doubly multiplexed hologram that enables simultaneous routing of two signal beams. Using a numerical model, we showed that the proposed scheme can manage more than 250 routing patterns for one signal flow with one multiplexed hologram at a signal-to-noise ratio of ∼5.

Original languageEnglish
Pages (from-to)2278-2286
Number of pages9
JournalApplied Optics
Volume39
Issue number14
Publication statusPublished - 2000 May 10

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Optical interconnects
code division multiple access
Holography
Holograms
holography
Code division multiple access
receivers
pseudorandom sequences
Masks
Numerical models
Signal to noise ratio
coding
signal to noise ratios
masks
routes
Experiments

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Spatial-phase code-division multiple-access system with multiplexed Fourier holography switching for reconfigurable optical interconnection. / Takasago, Kazuya; Takekawa, Makoto; Shirakawa, Atsushi; Kannari, Fumihiko.

In: Applied Optics, Vol. 39, No. 14, 10.05.2000, p. 2278-2286.

Research output: Contribution to journalArticle

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