搜索结果: 1-15 共查到“Tb”相关记录46条 . 查询时间(0.078 秒)
通过溶剂热反应成功合成出一种新型2D配位聚合物[Tb(1，4-bdc)1.5(phen)(H2O)]n(1)(1，4-H2bdc=对苯二甲酸；phen=菲咯啉)。对其进行了单晶X射线衍射、粉末X射线衍射、红外光谱、元素分析、荧光光谱表征。X射线衍射晶体学分析表明，配合物1结晶于三斜晶系P1空间群，2个相邻的Tb(Ⅲ)离子与4个1，4-bdc2-通过—O—C—O—桥联成双核单元，并进一步通过1，4-...
Tb/FeCo多层膜的垂直交换偏置效应
Tb/FeCo多层膜 条纹磁畴 垂直交换偏置效应
2016/12/6
采用磁控溅射方法，制备结构为Glass/Cu（60 nm）/[Tb（tTb=1.5，3.0 nm）/FeCo（1.5 nm）]5/Ta（10 nm）的两种不同Tb子层厚度的多层膜。采用X射线衍射分析仪、原子力和磁力显微镜、振动样品磁强计对样品的晶体结构、磁畴结构和室温磁性质进行表征，研究该多层膜系统的垂直磁各向异性和垂直交换偏置效应。X射线衍射分析表明，多层膜中Tb/FeCo界面主要呈非晶或纳米晶...
复旦大学实现Tb/s全光奈奎斯特信号远距离传输
复旦大学 Tb/s全光奈奎斯特信号 远距离传输
2015/10/29
复旦大学信息科学与工程学院通信系研究团队实现了偏振复用全光奈奎斯特信号的长距离传输，并首次成功实现了1Tb/s全光奈奎斯特信号全通带相干探测。相关研究成果日前发表于《科学报告》。此次的成果由博士张俊文、国家“千人计划”教授余建军和教授迟楠研究团队完成。
High Capacity Field Trials of 40.5 Tb/s for LH Distance of 1,822 km and 54.2 Tb/s for Regional Distance of 634 km
High Capacity Field Trials 40.5 Tbs for LH Distance of 1,822 km 54.2 Tbs for Regional Distance 634 km
2014/11/6
40.5 Tb/s over 1,822km and 54.2 Tb/s over 634km field SSMF was realized using 41 Nyquist rate DP-8QAM and DP-16QAM superchannels. They are the highest field capacities for long-haul and regional dista...
对相干光正交频分复用（orthogonal frequency division multiplexing，OFDM）在大容量和超长距离光传输中的应用进行了综合性的阐述. 首先，简单地描述了OFDM信号的原理，并对OFDM在光通信中的优势及劣势作了全面的分析. 其次，对Tb/s级OFDM的发射机、链路及接收机的设计进行了详细的描述，并介绍了迄今为止世界范围内已完成的具有里程碑意义的OFDM超大容量...
采用高温固相法合成了Ca3(PO4)2:RE3+(RE = Eu, Dy, Ce, Tb)系列发光材料，研究了其发光性质。研究表明Ca3(PO4)2: RE3+ 在紫外区域均能有效被激发，有很强的荧光发射，且发光范围覆盖蓝到红光波段，是一类可以紫外激发实现白光LED用的潜在荧光粉。在0.005到0.03 mol 浓度范围内，Eu，Dy和Ce掺杂的荧光粉的发光都发生了浓度淬灭，分别对应于0.025，...
TB-13钛合金动态再结晶行为研究
TB-13钛合金 轧态组织 动态再结晶
2012/1/11
研究TB-13钛合金在β单相区热轧变形过程中不同变形量对组织演变规律的影响。进行了32%,50%,59%和75%变形量的热轧后,利用光学显微镜和透射电子显微镜观察了该合金热轧变形后的组织变化。结果表明,TB-13钛合金在热轧变形过程中的动态再结晶发生机制是连续动态再结晶。当变形量为32%时,沿着轧制方向存在拉长的扁平状原始β晶粒,晶界平直,晶粒内部存在大量无规则位错和胞状结构位错。随着变形量的增加...
报道了氟氧化物纳米相玻璃陶瓷Tb(0.7)Yb(5)∶FOV的红外量子剪裁研究，测量了从可见到红外的荧光发光光谱、激发谱、和荧光寿命，分析了{1([5D4→7F6](Tb3+), 2([2F7/2→2F5/2](Yb3+)}的红外量子剪裁现象，发现了487.0 nm光激发5D4能级和378.0 nm光激发(5D3, 5G6)能级的理论量子剪裁效率ηｘ%Yb依次分别为121.35%和136.27%。...
Generation of Stable and High-Quality Multicarrier Source Based on Re-circulating Frequency Shifter for Tb/s Optical Transmission
Fiber optics communications Frequency modulation
2011/5/25
We theoretically and experimentally study the impact of implementation imperfections on the quality of multicarrier sources generated by re-circulating frequency shifting. Based on an optimized design...
2.1-Tb/s·km OFDM Long-Reach PON Transmission using a Cost-Effective Electro-Absorption Modulator
2.1-Tb/s·km OFDM Long-Reach PON Transmission Cost-Effective Electro Absorption Modulator
2011/5/20
We experimentally demonstrate a superior performance of 2.1-Tb/s·km OFDM-signal transmission over 100-km long-reach PONs, which is achieved by using an EAM and direct-detection, and adopting the 128-Q...
Significant Overhead Reduction of Multi-band Tb/s Coherent Optical OFDM Systems
Multi-band Tb/s Coherent Optical OFDM Systems Overhead Reduction
2011/5/15
The timing and optical laser phase of individual bands in multi-band OFDM are correlated. We significantly reduce the OFDM overhead through using FFT window synchronization for channel estimation and ...
1-Tb/s Large Girth LDPC-Coded Coherent Optical OFDM Transmission over 1040-km Standard Single-Mode Fiber
Large Girth LDPC-Coded Coherent Optical OFDM Standard Single-Mode Fiber
2011/5/15
We experimentally demonstrate 1-Tb/s CO-OFDM transmission over 1040-km standard single-mode fiber using 50% overhead girth-12 LDPC-coded 16-QAM. More than 4-dB improvement in OSNR sensitivity is achie...
报道了氟氧化物纳米相玻璃陶瓷Tb(0.7)Yb(5)∶FOV的红外量子剪裁研究，测量了从可见到红外的荧光发光光谱、激发谱、和荧光寿命，分析了{1([5D4→7F6](Tb3+), 2([2F7/2→2F5/2](Yb3+)}的红外量子剪裁现象，发现了487.0 nm光激发5D4能级和378.0 nm光激发(5D3, 5G6)能级的理论量子剪裁效率ηｘ%Yb依次分别为121.35%和136.27%。...
1-Tb/s DWDM Amplification in a Fiber Optical Parametric Amplifier
Parametric oscillators amplifiers Fiber optics communications
2010/6/10
We report less than 1-dB cross-talk penalty for 26 DWDM channels modulated at 43.7 Gb/s RZ-DPSK when amplified by a fiber optical parametric amplifier showing compatibility with high-capacity (> 1 Tb/...
1.28 Tb/s Wavelength Conversion for Polarisation Multiplexed RZ-DPSK Signals
Fiber optics communications Wavelength conversion devices
2010/6/10
All-optical wavelength conversion for single wavelength channel 1.28-Tb/s polarisation multiplexed RZ-DPSK signals was demonstrated using a 100-m polarisation-maintaining highly nonlinear fibre (PM-HN...