Xiaoxia Zhang
University of Electronic Science and Technology of China
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Featured researches published by Xiaoxia Zhang.
Optical Engineering | 2011
Yue Wen; Xiaoxia Zhang; Huadong Liu; Chunyang Huang; Jie Shen; Yan Zhu
Based on Wheelers transformation of multilayer microstrip line, velocity and impedance matching have been analyzed for polymer electro-optic (EO) modulator. Due to the advantages of polymer mate- rials, velocity-matching and impedance-matching can be simultaneously achieved by optimized design for multilayer microstrip electrode. A mod- ified modulator structure has been introduced with a compensation layer placed on the electrode to adjust the microwave index and characteristic impedance. The optimal thicknesses of electrode and compensation layer, and optimal width of electrode can make the EO modulator achieve both velocity matching and impedance matching. C 2011 Society of Photo-Optical
symposium on photonics and optoelectronics | 2012
Yue Wen; Xiaoxia Zhang; Yu Xiong
Ultra-Wide Band radio-over-fiber (UWBoF) techno-logy involves two kinds of communications. One is the UWB wireless communication, and the other is optical fiber communi-cation. In this paper, the UWBoF receiving system based on the external modulation such as Mach-Zehnder (M-Z) modulator is analyzed. The UWBoF components and the UWBoF receiver structure are introduced. The received high frequency UWB signal by UWB antenna has been transformed into the low frequency which could be fit the frequency requirement for the RF port of the M-Z modulator. The electronic signal can be transformed into the optical signal and transmit in optical fiber by M-Z modulator. Firstly, the characteristics of M-Z modulation are analyzed in theory. Then the half-wave voltage and the modulation output spectrums characteristics of the UWBoF receiving system have been tested. The testing results show that the output spectrums characteristics are consistent with the theoretical analysis.
symposium on photonics and optoelectronics | 2010
Jinkun Liao; Xionggui Tang; Rongguo Lu; Heping Li; Xiaoxia Zhang; Yongzhi Liu
Organic/Polymer rib optical waveguide is an important component in polymeric integrated optoelectronic devices as electro-optic modulators. By employing effective index method to calculate the transverse refractive index distribution and effective index of polymer rib waveguide, the optical field distribution in each region is expressed as piecewise functions approximately. Based on the scalar wave equation that governs the guided modes, the variational parameter is determined by variational method for obtaining accuracy transverse optical field distribution. The dispersion characteristics and transverse field distributions of the fundamental and higher order modes are analyzed for polymer rib multimode waveguide. An algorithm is implemented to investigate the effect of the structure parameters and dimensions on the dispersion characteristics, and the transverse optical intensity distributions of the fundamental and higher order modes for TM,TE modes are calculated. The approach has advantages such as high precision, small calculation complexity and high efficiency, which will provide theoretical reference and optimization method for the fabrication of polymeric electro-optic devices.
symposium on photonics and optoelectronics | 2010
Yue Wen; Xiaoxia Zhang; Huadong Liu; Sizhan Liu
An asymmetric path ridge waveguide for an organic polymer Mach-Zehnder modulator was designed to make the initial phase difference between the two arms be π/2. The mode characteristic is analyzed and the ridge waveguide is designed with effective index method (EIM). Optical field distribution has been simulated by Beam Propagation Method (BPM). Aiming at a smaller conductor loss and better impedance match, the structural parameters of electrode are also optimized. Combining with the parameters of the ridge waveguide and the electrode, velocities match between lightwave and microwave can be achieved. We showed that the thickness of the additional layer on the electrode must be taken into account because there is a significant change in the characteristic impedance. For our design, the estimated bandwidth of the asymmetric Mach- Zehnder modulator is over 150GHz.
Electronics Letters | 2009
Huiyong Li; X. L. Wu; Xiaoxia Zhang; Jinkun Liao; X. G. Tang; Y. Liu; Yuan-Fu Liu
Optical and Quantum Electronics | 2009
Zhiyong Dai; Jianfeng Li; Xiaoxia Zhang; Zhonghua Ou; Yongzhi Liu
Communications and Photonics Conference and Exhibition (ACP), 2009 Asia | 2010
Huiyong Li; Xiaoxia Zhang; Jinkun Liao; X. G. Tang; Y. Liu; Yupeng Liu
Optical and Quantum Electronics | 2009
Yue Wen; Xiaoxia Zhang; Huadong Liu; Chunyang Huang
Archive | 2011
Xiaoxia Zhang; Jie Shen; Yue Wen; Hongming Liu; Chunyang Huang; Yan Zhu
Archive | 2011
Xiaoxia Zhang; Yue Wen; Chunyang Huang; Huadong Liu; Jie Shen; Yan Zhu
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University of Electronic Science and Technology of China
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