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 language | English |
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Pages (from-to) | 462-464 |
Number of pages | 3 |
Journal | IEEE Photonics Technology Letters |
Volume | 19 |
Issue number | 7 |
DOIs | |
State | Published - 1 Apr 2007 |
Externally published | Yes |
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)