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A simple techniaue to control the transverse beam nrofile employing an acousto-optic modulator in the secondary cavity of a solid state laser system is reported.
We demonstrate a real-time FPGA implementation of coherent optical OFDM transmitter and receiver. It is implemented using two 2.5 GS/s DACs and one FPGA for transmitter, two ADCs and one FPGA for receiver, and FPGA based real-time digital signal processing for coherent optical OFDM transmission.
We demonstrate simple and wide carrier frequency offset compensation in CO-OFDM systems. The proposed method compensates CFO in the full-range as the sampling frequency. Using this method, we show PDM CO-OFDM-16QAM transmission over 1,600 km of standard single mode fiber.
This paper proposes an isolation-improvement technique for a MIMO antenna in small portable devices, by utilizing a one-dimensional electromagnetic bandgap (1-D EBG) and folded slot structures. Since the 1-D EBG structure provides in-phase reflection properties, and the folded slot structure acts as a decoupling resonator due to dissipation of radiated energy, mutual coupling among the antenna elements...
U-healthcare industry has appeared and devel-oped rapidly due to the development of the telecommunication and Health care technology, the increase of the needs of the Health care providers, and increment of the demands of the Health care users. The core factor of the U-Healthcare fields is the monitoring technique for the patients. In this paper, designed the system which was composed of power line...
Multiferroic (Bi1−xEux)(Fe1−xMnx)O3 (BEFM-x, x=0.00, 0.02, 0.04, 0.06, 0.08, and 0.10) thin films were prepared on Pt(111)/Ti/SiO2/Si(100) substrates by using a chemical solution deposition method. Compared to the pure BiFeO3 thin film, improved ferroelectric property and reduced leakage current density were observed in the co-doped BEFM-x thin films. Among them, the BEFM-0.08 thin film capacitor...
A compact STT (Spin-Transfer Torque)-RAM with a 14F2 cell was integrated using modified DRAM processes at the 54 nm technology node. The basic switching performance (R-H and R-V) of the MTJs and current drivability of the access transistors were characterized at the single bit cell level. Through the direct access capability and normal chip operation in our STT-RAM test blocks, the switching behavior...
Voltage instability usually occurs when the power systems are heavily stressed. In addition, the voltage instability is associated with not meeting the reactive power demands because of limitations on the production and transmission of reactive power. It may or may not be initiated by a disruption, but is usually characterized by shortage of fast-acting reactive power reserves. Reactive power reserves...
We have developed the first bi-directional ONT transceiver module having 10Gbit/s-Rx and 1.25Gbit/s-Tx for asymmetric high-speed TDM-PON, and have confirmed the 10Gbit/s downstream performance with the bi-directional transmission to support 128-way split and 10km reach.
Recessed channel array transistors (RCAT) for DRAM are implemented with <100> uni-axial and {100} uni-plane channels for the first time. It is found that this structure improves the cell transistor drivability by 25% with the improvement being more effective in straight shape active RCAT than the diagonal shape active RCAT due to the larger dimension of the horizontal <100> axial channel...
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