Optically controlled low-distortion delay of GHz-wide radio-frequency signals using slow light in fibers

Avi Zadok, Oded Raz, Avishay Eyal, Moshe Tur

Research output: Contribution to journalArticlepeer-review

45 Scopus citations

Abstract

Continuously tunable delay of broadband analog signals for microwave photonics applications is described and demonstrated, based on stimulated Brillouin scattering (SBS) in optical fibers. The optical spectrum of the pump laser is synthesized using chirp control, in order to obtain a broadened SBS "slow light" process, with long delay and low amplitude and phase distortions. The resulting SBS process is applied to delay 1-GHz-wide linear frequency modulated radio-frequency signals of arbitrary carrier frequency. Delays up to 230 ps are observed, with a worst-case sidelobe suppression ratio of -26 dB.

Original languageEnglish
Pages (from-to)462-464
Number of pages3
JournalIEEE Photonics Technology Letters
Volume19
Issue number7
DOIs
StatePublished - 1 Apr 2007
Externally publishedYes

Bibliographical note

Funding Information:
Manuscript received November 27, 2006; revised January 8, 2007. This work was supported in part by the Israel Science Foundation. The work of A. Zadok was supported by the Israel Clore Foundation under a Ph.D. study scholarship. A. Zadok, A. Eyal, and M. Tur are with the Faculty of Engineering, Tel-Aviv University, Tel Aviv 69978, Israel (e-mail: [email protected]). O. Raz was with the Faculty of Engineering, Tel-Aviv University, Tel Aviv 69978, Israel. He is now with the Department of Electrical Engineering, Technical University of Eindhoven, 5600 MB Eindhoven, The Netherlands. Color versions of one or more of the figures in this letter are available online at http://ieeexplore.ieee.org. Digital Object Identifier 10.1109/LPT.2007.891980

Keywords

  • Microwave photonics
  • Optical antenna beam-forming
  • Optical signal processing
  • Slow light
  • Stimulated Brillouin scattering (SBS)

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