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Theoretical study of implementing an all-optical analogue-to-digital conversion based on the Mach–Zehnder interferometric configurations

Authors
Journal
Optik - International Journal for Light and Electron Optics
0030-4026
Publisher
Elsevier
Publication Date
Volume
121
Issue
14
Identifiers
DOI: 10.1016/j.ijleo.2009.01.006
Keywords
  • Analogue-To-Digital (A-D) Converter
  • Self-Phase Modulation (Spm)
  • Cross-Phase Modulation (Cpm)
  • Mach–Zehnder Interferometric Configuration
Disciplines
  • Computer Science

Abstract

Abstract A new technique of ultrafast analogue-to-digital (A-D) conversion for an all-optical data processing is proposed. This technique is based on the Kerr nonlinearity-induced cross-phase modulation in single-mode Mach–Zehnder interferometer configurations arranged in a specific way. Two schemes, capable of realizing both sequential and parallel A-D conversions of optical signals are considered. The potential for an extremely high-bit-rate processing, up to 1 THz in each converter, is due to a femtosecond time response of Kerr effect in fused silica glass. Optical schemes of proposed devices are presented and algorithmically estimated; their functional capabilities are discussed.

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