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Proceedings Paper

Photonics-assistant spectra shaping of ultra-wideband signals for dynamic spectrum access in cognitive network
Author(s): Jianyu Zheng; Ninghua Zhu; Lixian Wang; Hui Wang; Yuanxin Du; Jianguo Liu
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Paper Abstract

The dynamic control for the spectra of the Ultra-wideband (UWB) signals, which is the key for implementing the dynamic spectrum access in the cognitive radio, is still a challenge due to the limited processing speed of the electronic devices. In this paper, we have summarized our recent work about controlling the spectrum shape of the UWB signals in optical domain, in addition to reviewing the other groups’ related research work. The experiment setups and results based on nonlinear dynamics of the optoelectronic oscillator and transfer response of the phase or polarization-to-intensity convertor will be described in detail respectively, in which the controllable frequency suppress for the optical UWB signals at specific frequency positions were implemented. Particularly, the UWB pulse with the special shape, which corresponds to the 5-GHz band-rejection in frequency domain, was generated in order to avoid the interference between UWB and Wireless Fidelity system in practice. In addition, the UWB signals whose center frequency could be continuously tuned and converted up to the frequency range of millimeter wave were generated by utilizing the polarization modulator based optical switch. The areas for future development and the challenge of implementing these techniques for the applications in practice will also be discussed.

Paper Details

Date Published: 29 November 2012
PDF: 15 pages
Proc. SPIE 8552, Semiconductor Lasers and Applications V, 85520H (29 November 2012); doi: 10.1117/12.2001226
Show Author Affiliations
Jianyu Zheng, Institute of Semiconductors (China)
Ninghua Zhu, Institute of Semiconductors (China)
Lixian Wang, Institute of Semiconductors (China)
Hui Wang, Institute of Semiconductors (China)
Yuanxin Du, Institute of Semiconductors (China)
Jianguo Liu, Institute of Semiconductors (China)


Published in SPIE Proceedings Vol. 8552:
Semiconductor Lasers and Applications V
Ning Hua Zhu; Jinmin Li; Frank H. Peters; Changyuan Yu, Editor(s)

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