搜索结果: 91-105 共查到“知识库 光电信息处理”相关记录174条 . 查询时间(1.969 秒)
为了克服衍射效应对光声成像系统分辨率的限制，需要采用逆卷积方法进行图像反演．从理论上分析了声透镜成像原理，模拟仿真了声透镜的点扩展函数对声透镜成像系统分辨率的影响和维纳滤波解卷积方法复原光声成像的过程，并利用自搭建的声透镜光声成像系统进行了深入的实验研究，得到了物平面上相距４ｍｍ 和３ ｍｍ 的两个黑胶带点的直接成像光声图以及经过维纳滤波解卷积方法得到的还原图，并进行了比较．仿真结果与实验结果一致...
设计了一种基于模间干涉的亚波长直径光纤气体折射率传感方案，并分析了其测量灵敏
度．将标准单模光纤和一段仅传输基模与二阶模的无包层亚波长直径光纤结合形成传感头，通过分
析传感头外气体折射率的变化对两个模式干涉谱峰值移动的影响，研究了这种传感器的折射率测
量灵敏度．结果表明，这种传感器的灵敏度高于利用折射率引导型光子晶体光纤的基于模间干涉的
折射率传感器．因为没有气体向微孔扩散的过程，这种基于...
Compensation of Cross-gain Modulation in Filtered Multi-channel Optical Signal Processing Applications
Fiber optics communications Phase modulation Radio frequency photonics
2010/6/10
We experimentally demonstrate compensation of nonlinearity due to cross-gain modulation in wideband analog systems employing narrow-band optical filtering, which is essential for multi-channel optical...
Novel Optical Fast Fourier Transform Scheme Enabling Real-Time OFDM Processing at 392 Gbit/s and Beyond
Optical communications Discrete optical signal processing
2010/6/10
An optical FFT scheme is implemented and tested at 392 Gbit/s. It enables OFDM sig-nal processing way beyond the bandwidth limits of electronics. The scheme operates with little energy as it exploits ...
Improvement of Chromatic Dispersion and Differential Group Delay Tolerance of Incoherent Multilevel Signaling with Receiver-side Digital Signal Processing
Fiber optics communications Modulation
2010/6/10
Chromatic dispersion and differential group delay tolerance of 30-Gbit/s 8DPSK and 8QAM signaling is investigated experimentally, and we show 1.7 and 1.25 times enhancement of them in 8QAM signaling b...
We report novel InGaAs/InP modified uni-traveling carrier photodiodes with record linearity. At low frequencies the third-order output intercept point (OIP3) is 55 dBm and remains as high as 47.5 dBm ...
Design-Space Exploration for CMOS Photonic Processor Networks
Optical interconnects Photonic integrated circuits
2010/6/10
Monolithically integrated dense WDM photonic network topologies optimized for loss and power footprint of optical components can achieve up to 4x better energy-efficiency and throughput than electrica...
All-Optical XOR Gate with Feedback using Highly Ge-Doped Nonlinear Fiber
Optical logic devices Nonlinear optics fibers Highly Ge-doped nonlinear fiber
2010/6/10
We demonstrate an all-optical XOR gate with feedback using cross-polarization-rotation in a highly Ge-doped-nonlinear fiber. The optical feedback employs a TOAD to clean up signal and for wavelength c...
在光学相关识别中，对相关输出结果进行后处理是保证图像识别准确性的关键之一。研究者通常采用神经网络技术对相关输出结果进行处理，并取得了较好的效果，但它需要预先准备大量的相关峰和噪声峰训练样本。根据极坐标变换能将笛卡尔坐标系下的旋转转变成平移的性质以及傅里叶变换的平移不变性，提出一种基于傅里叶-极坐标变换的相关结果后处理方法。验证结果表明：目标的旋转图像与目标自身的傅里叶-极坐标变换的相似度较大，而干...
Giant Dispersive Wave Generation Induced by Soliton Collisions
Pulse propagation temporal solitons Photonic crystal fibers Supercontinuum generation
2010/6/5
We report on a novel effect in which soliton collisions can lead to the generation of dispersive wave with extreme peak power and enhanced spectral shift in a photonic crystal fiber with two zero-disp...
Concurrent Processing of Multiple LSP Request Bundles on a PCE in a WDM Network
Fiber optics optical communications Networks
2010/6/5
Concurrent RWA algorithm for differentiated services to process multiple LSP bundles at PCE is proposed. Significant blocking probability reduction has been observed at the expense of slightly increas...
M-PSK Versatile Modulation using a Single-electrode Straight-line Phase Modulator and Digital Signal Processing for ISI-suppression
Coherent communications Fiber optics communications
2010/6/5
BPSK, QPSK, and 8-PSK modulation/demodulation was experimentally demonstrated using only a single-electrode straight-line phase modulator for the first time. ISI caused by the modulation was compensat...
Optically Powered Low-Energy Demarcation Device for Monitoring FTTx Networks
Fiber optics optical communications Remote sensing sensors
2010/6/5
We demonstrate an energy-autarkic FTTx monitor. A special protocol and sophisti-cated hardware reduce the electrical operating power to 0.7μW, which can be delivered by an optical supply signal of onl...
Transparent WDM Network with Bitrate Tunable Optical OFDM Transponders
Networks network optimization Modulation
2010/6/5
Reach estimations for several variable-bitrate OFDM schemes are presented and discussed in the framework of a transparent EU core network scenario. 44% reduction on OE interfaces is found compared to ...
Optimal Hardware Module Planning and Switch Backplane Configuration for Layer-One Traffic Grooming
Networks network optimization
2010/6/5
We present an automatic hardware module planning approach for optical transport networks. An optimal switch backplane size is identified that can achieve the most cost-effective hardware module planni...