搜索结果: 1-15 共查到“光学工程 Level-1”相关记录25条 . 查询时间(0.093 秒)
The concrete world that surrounds us owes its shape and durability to chemical reactions that start when ordinary Portland cement is mixed with water. Now, MIT scientists have demonstrated a way to wa...
HIGH-LEVEL-OF-DETAIL SEMANTIC 3D GIS FOR RISK AND DAMAGE REPRESENTATION OF ARCHITECTURAL HERITAGE
Cultural Heritage Semantic 3D Model Database
2018/11/9
The need to share information about architectural heritage effectively after a disaster event, in order to foster its preservation, requires the use of a common language between the involved actors an...
SUITABILITY ASSESSMENT OF GROUND LEVEL IMAGERY FOR GEOSPATIAL VR MODELING
Ground-level Imagery VR Modeling Suitability Ranking
2015/8/7
Improvements in sensor technology and modeling capabilities have resulted in a trend towards generating large-scale VR models of
urban scenes, for use in geospatial applications. Selecting the appro...
Multi-level recording in erasable phase-change media by light intensity modulation
light intensity modulation multilevel recording optical disk pulse position modulation multil-layer
2011/11/29
Multilevel recording has an advantage of increasing the recording density without extensively altering altering the current optical configuration.Four-level recording schemes in phase-change disks usi...
Two-photon transport in a waveguide coupled to a cavity in a two-level system
Two-photon transport waveguide coupled cavity two-level system
2015/8/10
We study two-photon effects for a cavity quantum electrodynamics system where a waveguide is coupled to a cavity embedded in a two-level system. The wave function of two-photon scattering is exactly s...
Few-photon transport in a waveguide coupled to a pair of colocated two-level atoms
Few-photon transport waveguide coupled colocated two-level atoms
2015/8/7
We calculate the one- and two-photon scattering matrices of a pair of collocated nonidentical two-level atoms coupled to a waveguide. We show that by proper choice of a two-photon input, the backgroun...
PDL and PMD Emulation with Control of Amplitude and Spectral Dependence to a Sub-Channel Level across the C-Band
Optical instruments Optical communications
2015/5/25
We present results of a polarization diverse LCoS wavelength processor. Applications include impairment simulation of broadband, channelized and intra-band PMD and PDL for detailed experimental sensit...
Bandwidth Measurement of Multimode Fibers through System Level Bit Error Rate Testing
Bandwidth Measurement Multimode Fibers Bit Error Rate Testing
2015/5/18
A new bandwidth measurement method for multimode fibers is developed through measuring bit error rate and power penalty associated with the testing system. Experimental calibration procedure and actua...
Frame-level OEO-Regenerating GPON Reach Extender
Frame-level OEO-Regenerating GPON Reach Extender
2015/5/18
We propose and experimentally demonstrate a frame-level OEO-regeneration technique for GPON reach extension which overcomes the limitations of bit-level OEO-regeneration with respect to upstream effic...
300 Mbps Transmission with 4.6 bit/s/Hz Spectral Efficiency over 50 m PMMA POF Link Using RC-LED and Multi- Level Carrierless Amplitude Phase Modulation
300 Mbps Transmission 4.6 bit/s/Hz Spectral Efficiency PMMA POF Link Multi- Level Carrierless Amplitude Phase Modulation
2015/5/18
Successful transmission of up to 300 Mbps over a 50 m long POF link using a commercially available Fast Ethernet capable RC-LED is presented. Carrierless Amplitude Phase modulation was used with 16- a...
Full inversion of a two-level atom with a single-photon pulse in one-dimensional geometries
Full inversion two-level atom single-photon pulse one-dimensional geometries
2015/8/10
We analyze a system comprising a one-dimensional single-mode waveguide (a) coupled directly to a two-level atom (b) side-coupled to a cavity containing a two-level atom and show that in both cases it ...
Fiber Based Ultrashort Pulse System with Kilowatt Level Average Power
Fiber optics amplifiers oscillators Ultrafast Lasers
2015/6/9
We report on the generation of 830 W of compressed average power at 78 MHz pulse repetition frequency and 640 fs pulse duration. We discuss further power scaling including the issue of transversal spa...
A “Linear” High-Contrast Gratings Hollow-Core Waveguide and its System Level Performance
Gratings Nonlinear Systems Waveguides
2015/6/9
The high-contrast gratings assisted hollow-core waveguide demonstrates an ultra-low nonlinearity (<6×10 -13 /W/m). Digital and analog system-level simulations further show that the waveguide does not...
The Transition to Chip-level Optical Interconnects
Optical Interconnects Photonic Integrated Circuits
2015/6/8
The increasing bandwidth demands of computing chips have spawned significant research into chip-scale photonic interconnects. We review the DARPA-sponsored efforts at the inter- and intra-chip interco...
Advanced Coherent Modulation Formats and Algorithms: Higher-Order Multi-Level Coding for High-Capacity System Based on 100Gbps Channel
Coherent communications Fiber optics communications
2015/6/5
We review recent technology advances in high-capacity 100Gbps system using polarization-division-multiplexed (PDM) eight-level coding (8PSK and 8QAM) and DSP-based intradyne detection.Research activit...