[1] [1] FISHER M R, CHUANG S L. A microwave photonic phase-shifter based on wavelength conversion in a DFB laser［J］. IEEE Photonics Technology Letters, 2006, 18(6): 1714-1716.

[2] [2] LOAYSSA A, LAHOZ F J. Broad-band RF photonic phase shifter based on stimulated Brillouin scattering and single-sideband modulation［J］. IEEE Photonics Technology Letters, 2006, 18(1): 208-210.

[3] [3] CHANG Qing-jiang, LI Qiang, ZHANG Zi-yang, et al. A tunable broad-band photonic RF phase shifter based on a silicon microring resonator［J］. IEEE Photonics Technology Letters, 2009, 21(1): 60-62.

[4] [4] PU M, LIU L, XUE W, et al. Tunable microwave phase shifter based on silicon on insulator microring resonator［J］. IEEE Photonics Technology Letters, 2010, 22(12): 869-871.

[5] [5] XU Qian-fan, FATTAL D, BEAUSOLEIL R G, et al. 1.5 μm-radius high-Q silicon microring resonators［C］. 2008 Conference on Lasers and Electro-Optics and 2008 Conference on Quantum Electronics and Laser Science (CLEO/QELS 2008), 2008, San Jose, CA, USA, 1-2.

[6] [6] PU M, LIU L, XUE W, et al. Widely tunable microwave phase shifter based on silicon-on-insulator dual-microring resonator［C］. Optics Express, 2010, 18(6): 6172-6182.

[7] [7] CHAO C Y, GUO L J. Design and optimization of microring resonators in biochemical sensing applications［J］. IEEE Journal of Lightwave Technology, 2006, 24(3): 1395-1402.

[8] [8] HEEBNER J E, WONG V, SCHWEINSBERG A, et al. Optical transmission characteristics of fiber ring resonators［J］. IEEE Journal of Quantum Electron, 2004, 40(6): 726-730.

[9] [9] LLORET J, SANCHO J, PU M, et al. Complex-coefficient microwave photonic tunable filter using slow light silicon-on-insulator-based microring resonator［C］. Microwave Photonics, 2011 International Topical Meeting on & Microwave Photonics Conference, 2011 Asia-Pacific, MWP/APMP, 2011, 421-424.

[10] [10] LI Qiang, CHANG Qing-jiang, LIU Fang-fei, et al. Optically tunable microwave-photonic phase shifter based on silicon microring resonator［C］. 34th European Conference on Optical Communication, 2008, 1-2.