A tunable microwave photonic filter with complex coefficient based on slicing spectrum and stimulated Brillouin scattering

Abstract

In this paper, we propose a method to realize microwave photonic filter (MPF) with complex coefficient, whose central frequency f₀ and 3 dB bandwidth are tunable. The complex coefficient is realized by multi-wavelength optical source and stimulated Brillouin scattering (SBS). The central frequency of the filter is tuned by adjusting the phase shift caused by SBS without changing its frequency response. The frequency selectivity of filter can be improved through increasing the bandwidth of broadband optical source (BOS) or decreasing wavelength separation to increase the taps of MPF. The mainlobeto-sidelobe suppression ratio (MSSR) of the filter is affected by the weight of each tap. When the length of fiber is 0.5544 m in birefringence fiber loop mirror (FLM), the MSSR is improved by 18.55 dB compared with that without the weight controlling.

Keywords

Fiber Bragg Grating / IEEE Photon / Semiconductor Optical Amplifier / Stimulate Brillouin Scattering / Complex Coefficient

References

[1] DaiY., YaoJ.. IEEE Transactions on Microwave Theory and Techniques, 2010, 58: 3279

[2] YangX.-s., HuangX.-g., XieJ.-l., ZhuJ.-h.. Journal of Optoelectronics·Laser, 2011, 22: 706

[3] M. Sagues, R. Garcia-Olcina, A. Loayssa, S. Sales and J. Capmany, Multiple-Tap Complex-Coefficient Incoherent Microwave Photonics Filters using Phose-Shifted Fiber Bragg Gratings, European Conference and Ehxibition of Optical Communication (ECOC), 1 (2007).

[4] YanY., YaoJ.. IEEE Photon. Technol. Lett., 2007, 19: 1472

[5] LiW., ZhuN., WangL. X.. IEEE Photonics Journal, 2011, 3: 462

[6] LiX., DongJ., YuY., ZhangX.. IEEE Photon. Technol. Lett., 2011, 23: 308

[7] XueW., SalesS., MorkJ., CapmanyJ.. IEEE Photon. Technol. Lett., 2009, 21: 167

[8] PuM., LiuL., XueW., DingY., FrandsenL. H.. Haiyan Ou, Kresten Yvind and Jorn M. Hvam, IEEE Photon. Technol. Lett., 2010, 22: 869

[9] LoayssaA., CapmanyJ., SaguesM., MoraJ.. IEEE Photon. Technol. Lett., 2006, 18: 1744

[10] YinJ.-c., XiaoX.-s., YangC.-x.. Journal of Optoelectronics·Laser, 2010, 21: 786

[11] LoayssaA., LahozF. J.. IEEE Photon. Technol. Lett., 2006, 18: 208

[12] SaguesM., LoayssaA., CapmanyJ.. IEEE Photon. Technol. Lett., 2007, 19: 1194

[13] LoayssaA., HernandezR., BenitoD., GalechS.. Opt. Lett., 2004, 29: 638

[14] RomanJ. E., FrankelM. Y., EsmanR. D.. Opt. Lett., 1998, 23: 939

[15] ZhaoC.-L., YangX., LuC., JinW., DemokanM. S.. IEEE Photon. Technol. Lett., 2004, 16: 2353

This work has been supported by the National Natural Science Foundation of China (No.60808004).