Frontiers of Optoelectronics

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Simplified adaptively modulated optical OFDM modems using subcarrier modulation with added input/output reconfigurability
Frontiers of Optoelectronics - Tập 5 - Trang 187-194 - 2012
Xing Zheng, Jinlong Wei, Roger Philip Giddings, Jianming Tang
Three novel designs of adaptively modulated optical orthogonal frequency division multiplexing modems using subcarrier modulation (AMOOFDM-SCM) are proposed, for the first time, each of which requires a single inverse fast Fourier transform/fast Fourier transform (IFFT/FFT) operation. These designs not only significantly simplify the AMOOFDM-SCM modem configurations, but also offer extra unique ne... hiện toàn bộ
Controllable multicast for IPTV over EPON
Frontiers of Optoelectronics - Tập 2 - Trang 222-228 - 2009
Chuanhao Zhang, Deming Liu, Li Zhang, Guangsheng Wu
The character of 1 Gbps bandwidth and treebased structure make Ethernet passive optical network (EPON) very suitable for broadcast or multicast services such as Internet protocol television video (IPTV). The document proposed a novel scheme, based on the former research for controllable multicast over EPON system, mainly considering system security and maintainability. It can both control the IPTV... hiện toàn bộ
An analog notch filter for piezoelectric optical scanner
Frontiers of Optoelectronics - Tập 3 - Trang 370-375 - 2010
Xin Wu, Sihai Chen, Xiaogang Xiong, Benyi Shi, Wei Chen
The optical scanner is one of the most important components in free-space optical communications, airborne and space-based lidars, adaptive optics, and so on. The performance of an optical scanner is frequently limited by the presence of mechanical resonances. This paper presents an analog notch filter with adjustable function to reject the mechanical resonances of the optical scanner. First of al... hiện toàn bộ
Fiber sensor of online biomass testing
Frontiers of Optoelectronics - Tập 1 - Trang 85-90 - 2008
Mingfu Zhao, Qiang Liao, Yan Chen, Nianbing Zhong
A new testing method for biomass concentration and sensor design is developed to realize online testing of biomass concentration in the microbial bacterium liquid. The sensor structure theory, optical path, theory analysis and experiment are studied in-depth. First, the optical absorption and optical scattering are related to the optical distance and incidence energy. The change in biomass concent... hiện toàn bộ
Security of polarization-shift keying chaos optical communication system
Frontiers of Optoelectronics - - 2008
Nian Fang, Lutang Wang, Shuqin Guo, Zhaoming Huang
AlGaAs/GaAs quantum well infrared photodetector focal plane array based on MOCVD technology
Frontiers of Optoelectronics - - 2009
Xianjie Li, Yingbin Liu, Zhen Feng, Fan Guo, Yonglin Zhao, Run Zhao, Rui Zhou, Chen Lou, Shizu Zhang
128 × 128, 128 × 160 and 256 × 256 AlGaAs/GaAs quantum well infrared photodetector (QWIP) focal plane arrays (FPA) as well as a large area test device are designed and fabricated. The device with n-doped back-illuminated AlGaAs/GaAs quantum structure is achieved by metal organic chemical vapor deposition (MOCVD) epitaxial growth and GaAs integrated circuit processing technology. The test device is... hiện toàn bộ
Analysis of mode-field half widths of two kinds of single-mode waveguides
Frontiers of Optoelectronics - Tập 2 - Trang 35-39 - 2009
Lianhuang Li, Fuyuan Guo
The mode-field half widths of two kinds of single-mode waveguides are investigated. Based on the maximal matching efficiency method, the relationship between the mode-field half width and normalized frequency is analyzed. Furthermore, two equations of mode-field half widths as a function of normalized frequency are proposed through mathematical modeling and the curve fitting method. Numerical calc... hiện toàn bộ
Microring resonator for glucose sensing applications
Frontiers of Optoelectronics - Tập 2 - Trang 304-307 - 2009
Yao Chen, Zhengyu Li, Huaxiang Yi, Zhiping Zhou, Jun Yu
Silicon nitride microring resonators were demonstrated as chemical sensors. The microring devices, with diameter of 100 μm, were fabricated using complementary metal oxide semiconductor (CMOS)-compatible technology, and a high Q factor of 15000 was realized with free spectrum range (FSR) of 2 nm. The structures were further packaged to perform as chemical sensors, and their functionality was prove... hiện toàn bộ
Consideration of chiral optical fibres
Frontiers of Optoelectronics - Tập 3 - Trang 67-70 - 2010
Alexander Argyros, Mark Straton, Andrew Docherty, Eun Hee Min, Ziyi Ge, Kok Hou Wong, Francois Ladouceur, Leon Poladian
Circular birefringence is a property of chiral materials. In this work, we consider the use of chiral materials in optical fibres to produce circularly birefringent optical fibres and in fibres where a contrast in circular birefringence contributes to forming the waveguide. (t϶-menthyl methacrylate is also investigated as a possible material for the fabrication of such fibres.
Slow light in silicon microring resonators
Frontiers of Optoelectronics - Tập 4 - Trang 282-287 - 2011
Yingtao Hu, Xi Xiao, Zhiyong Li, Yuntao Li, Yude Yu, Jinzhong Yu
This paper experimentally investigated slow light effect in cascaded silicon-on-insulator (SOI) microring resonators. Double channel and single channel side-coupled integrated spaced sequence of resonators (SCISSOR) devices were fabricated with electron beam lithography and dry etching technology. The delay performances of the SCISSOR devices were demonstrated using non-return-to-zero (NRZ) and re... hiện toàn bộ
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