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Demonstration of Asynchronous,10Gbps OCDMA PON system with Colorless and Sourceless ONUs
Asynchronous OCDMA PON system Colorless Sourceless ONUs
2009/7/16
We experimentally demonstrate for the first time an error-free asynchronous, 10-Gbps full-duplex DPSK OCDMA system that does not require any laser source at the users premises.
Bidirectional Transmission in Colourless WDM-PON based on Injection- Locked Fabry-Perot Laser at 2.5 Gbit/s using Low-Cost Seeding Source
Bidirectional Transmission Colourless WDM-PON Injection- Locked Fabry-Perot Laser Low-Cost Seeding Source
2009/7/16
Error-free transmission over 20km of 8-channels for both downstream and upstream in colourless WDM-PON based on injection-locked Fabry-Perot laser is experimentally demonstrated at 2.5Gbit/s, using a ...
WDM-PON Overview
WDM-PON
2009/7/15
WDM-PON with colourless ONU will be a key building block to provide future video centric services to users. We reviewed technologies for the WDM-PON including commercial system and recent research res...
Straightforward Chromatic Dispersion Measurement Based on Phase Mismatching FWM
Straightforward Chromatic Dispersion Measurement Mismatching FWM
2009/7/15
Novel chromatic dispersion measurement is demonstrated with simple setup based on phase mismatching four-wave-mixing. According to high accuracy of measured dispersion spectra, zero-dispersion wavelen...
10 cm spatial resolution and 20 km range full polarimetric reflectometry for distributed DGD measurement of high PMD fibres
polarimetric reflectometry distributed DGD measurement PMD fibres
2009/7/15
Full polarimetric reflectometry is realized with a spatial resolution of 10 cm over 20 km based on phase-noise compensated optical frequency domain reflectometry. Distributed DGD measurement of high P...
Sub-cm Spatial Resolution Reflectometry over 10 km Based on Phase Noise Compensated OFDR with Third Order Sideband Sweeping
Sub-cm Spatial Resolution Reflectometry Phase Noise Compensated OFDR
2009/7/15
We describe PNC-OFDR employing 3rd order sideband sweeping to realize a broader frequency sweep span. We achieved a sub-cm spatial resolution over a 10 km measurement range.
Pseudo-Return-to-Zero Modulation Scheme:Application to the Compensation of Intra-Polarization Skew for PolMux Signals
Pseudo-Return-to-Zero Modulation Scheme Compensation Intra-Polarization Skew PolMux Signals
2009/7/15
We demonstrate a precise skew monitoring between multiplexed polarizations, demultiplexed polarization discrimination and large-PMD tolerance enhancement for 110Gbit/s PolMux-QPSK signal, by introduci...
40 λ WDM Channel-by-Channel and Flexible Dispersion Compensation at 40 Gb/s Using Multi-channel Tunable Optical Dispersion Compensator
WDM Channel-by-Channel Flexible Dispersion Compensation Multi-channel Tunable Optical Dispersion Compensator
2009/7/15
We successfully demonstrated channel-by-channel and flexible CD compensation of 40 λ WDM signals at 40 Gb/s in 40/80 km spans using passband widened AWG-LCOS-based multi-channel TODC combined with a ...
Chromatic Dispersion Tolerant Subcarrier Multiplexing Scheme Based on Tandem Frequency Shifted Optical SSB Modulation
Chromatic Dispersion Tolerant Subcarrier Multiplexing Scheme Tandem Frequency Shifted Optical SSB Modulation
2009/7/15
We propose a novel CD tolerant SCM scheme using tandem frequency shifted optical SSB modulation,which supports high frequencies and removes fading effect from vestigial sideband. Experiments show the ...
叶绿素a和b在植物生长过程中起着至关重要的作用，精确测定其含量，可为农作物生长状况、植物病理诊断等提供科学依据，是实施精准农业的关键所在。文章将前人已经给出的叶绿素a和叶绿素b的吸收光谱实验数据，转换为透过光谱。用人眼观察其透过光谱，显然就形成叶绿素a和b的颜色。于是，根据色度学的三基色原理，选择具有确定光谱功率分布的标准光源作为照明光源，确定了它们在CIE1931-色品图中的色度坐标：叶绿素a为...
大气中目标背景对比度及其影响因素的数值分析
标背景对比度 辐射传输 离散纵标法
2009/2/19
从辐射传输理论出发，利用离散纵标法软件包（DISORT），计算了典型大气条件下0.55μm波长的目标背景对比度，分析了观察者的天顶角和方位角、水平能见度、垂直高度、太阳的天顶角和方位角以及气溶胶单次散射反照率对目标背景对比度的影响。结果表明：目标背景对比度随着观察者天顶角余弦的增加而增加；随着太阳天顶角余弦的增加而减小；随着观察者和太阳方位角差的增加而增加；随着高度的增加而减小；随着水平能见度的增...
晴朗无云天空光谱辐射的近似计算模型
天空辐射 光谱亮度 计算模型
2009/2/13
利用大气光学质量和大气气溶胶光学厚度的经验公式，由HITRAN数据库获得大气分子谱线参数，基于辐射传输方程，给出了晴朗无云天空光谱辐射的近似计算模型。根据该近似计算模型对晴朗无云天空光谱辐射亮度进行的计算结果表明：天空光谱辐射亮度曲线上存在明显的O2和H2O吸收线；晴朗无云天空辐射的光谱分布偏蓝，天空亮度主要集中在短波段部分；太阳角小的天空光谱亮度出现“红移”现象；由于大气厚度变大，近地平的天空辐...
软X光辐射烧蚀实验方法研究
辐射烧蚀 金箔
2009/2/12
用强激光辐照金箔靶，以金箔背侧软X光辐射为基础，提出了软X光辐射烧蚀研究的新靶型、新方法，做了C8H8样品辐射烧蚀初步实验。