国际光学工程学会
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作者:Qi Zhang , Peiyu Li ...
来源:[J].Journal of Nanophotonics(IF 1.644), 2018, Vol.12 (1), pp.016011-016011SPIE
摘要:A device is designed for generating the near-field optical vortex (NFOV) using linearly polarized light illumination. This optical vortex generator consists of 18 homogeneous rectangular holes. Each rectangular hole can be modeled as a pair of orthogonal dipoles with π / 2 a...
作者:Qi Zhang , Lingke Jiang ...
来源:[J].Optical Engineering(IF 0.88), 2018, Vol.57 (5), pp.055102-055102SPIE
摘要:A bandwidth reconfigurable and passband switchable filter is proposed and experimentally demonstrated. Based on the same structure, the filter can realize a single broadened response, two passbands with tunable bandwidth or multiband filter. A single broadened response adopts bin...
作者:Qi Zhang , Feng Tian ...
来源:[J].Optical Engineering(IF 0.88), 2017, Vol.56 (5), pp.056109-056109SPIE
摘要:A complex adaptive equalizer using a least-mean-square (LMS) algorithm is proposed to mitigate the effect of nonlinear interference induced by cross-phase modulation in wavelength-division multiplexing (WDM) coherent optical systems. We show the effect of nonlinear interference i...
作者:Qi Zhang , Qinghua Tian ...
来源:[J].Optical Engineering(IF 0.88), 2017, Vol.56 (7), pp.076111-076111SPIE
摘要:Elastic software-defined optical networks greatly improve the flexibility of the optical switching network while it has brought challenges to the routing and spectrum assignment (RSA). A multilayer virtual topology model is proposed to solve RSA problems. Two RSA algorithms based...
作者:Qi Zhang , Qinghua Tian ...
来源:[J].Optical Engineering(IF 0.88), 2017, Vol.56 (3), pp.036104-036104SPIE
摘要:The wavelength-division multiplexing passive optical network (WDM-PON) is a potential technology to carry multiple services in an optical access network. However, it has the disadvantages of high cost and an immature technique for users. A software-defined WDM/time-division multi...
作者:Qi Zhang , Qinghua Tian ...
来源:[J].Optical Engineering(IF 0.88), 2018, Vol.57 (2), pp.026107-026107SPIE
摘要:A rate-adaptive multilevel coded modulation (RA-MLC) scheme based on fixed code length and a corresponding decoding scheme is proposed. RA-MLC scheme combines the multilevel coded and modulation technology with the binary linear block code at the transmitter. Bits division, ...
作者:... Cheng Ju , Qi Zhang , Huitao Wang
来源:[J].Optical Engineering(IF 0.88), 2015, Vol.54 (4), pp.046105-046105SPIE
摘要:Intensity modulation and direct detection signal are sensitive to power fading and nonlinear intersymbol interference (ISI) induced by modulator chirp, fiber dispersion, and square-law photo-detection. We propose and experimentally demonstrate a Nyquist 4-ary pulse amplitude modu...
作者:Qi Zhang , Qinghua Tian ...
来源:[J].Optical Engineering(IF 0.88), 2015, Vol.54 (11), pp.116102-116102SPIE
摘要:We propose a technique for the generation of optical frequency comb from a single source, which reduces the costs of optical access networks. Two Mach-Zehnder modulators are cascaded with one phase modulator driven by radiofrequency signals. With 10-GHz frequency spacing, the gen...
作者:Zhihu Wang , Jiulong Xiong , Qi Zhang
来源:[J].Journal of Electronic Imaging(IF 1.061), 2015, Vol.24 (3), pp.033022-033022SPIE
摘要:We focus on motion saliency detection, which has attracted much attention in recent years. Distinct from conventional algorithms, without considering the spatial information of the input frames, our method is solely based on the temporal difference of corresponding pixels. To be ...
作者:... Dongdong Shang , Qi Zhang , Yingfeng Liu
来源:[J].Optical Engineering(IF 0.88), 2015, Vol.54 (11), pp.116103-116103SPIE
摘要:We propose a method of digital signal processing for a burst-mode coherent receiver, which can recover the burst data rapidly aided by a control signal. The feasibility and effectiveness of our proposed method are demonstrated in a 128 Gbps polarization division multiplexed quadr...

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