Tian Huiping

Omnidirectional Photonic Band Gap Broadening in One dimensional Photonic Crystals

We designed a gradual period one dimensional photonic crystals structure. The transmission spectra of this structure have been studied. The numerical result shows that the photonic band gap (PBG) width is enlarged and the photonic band gap shifts to longer wavelength in the case of normal incident. Verifying the incident angle, we obtained broadened total omnidirectional PBG of this gradual structure. The omnidirectional PBG width is increased 1.53 times compared with the general even one dimensional photonic crystals structure.

Large dynamic, recon gurable, distributed intelligent radio-over-fiber (I-ROF) system

Strongly driven by the demand of high-definition video, digital health, Internet of Things, and virtual reality, broadband, ubiquitous and convergent access of information has become the most important engine to push forward the development of the modern information society. Intelligent Radio-over-Fiber (I-ROF) system, which combines the advantages of wireless flexible access and fiber-optic broadband transmission, has promising application prospects with the multi-band, multi-standard microwave signal generation in the optical domain, broadband processing, large dynamic transmission, access and reconfigurable networking. We study the fundamental principles, network architecture and enabling technologies of I-ROF systems in the views of modules, system applications and networking. In the aspect of modules, broadband and multi-standard microwave/millimeter-wave band vector signal generation, instantaneous photonic microwave frequency measurement, broadband and tunable microwave photonic filter based on photonic crystal and broadband and high efficient electromagnetic band gap structure antenna are investigated. For system applications, large dynamic ROF system, cognitive collaborative and power conservation ROF system, and optical and wireless resources joint management I-ROF system are covered. As for networking, network architecture of I-ROF, MAC protocol of the distributed ROF network are studied. The broadband access and ubiquitous sensing oriented, large dynamic, reconfigurable, distributed I-ROF system has been built to realize the broadband wireless access applications.