搜索结果: 16-30 共查到“光学工程 Modulation”相关记录144条 . 查询时间(0.076 秒)
Spectral Target-Detecting System Using Sine-Wave Modulation
Sine-wave modulation Analog Target detection Optical spectrum
2011/10/1
Target detection is one of the key technology of precision chemical application. Previously the digital coding modulation technique was commonly used to emit and receive the optical signal in the targ...
Perturbation theory for plasmonic modulation and sensing
Perturbation theory plasmonic modulation sensing
2011/8/10
We develop a general perturbation theory to treat small parameter changes in dispersive plasmonic nanostructures and metamaterials. We specifically apply it to dielectric refractive index and me...
Novel Flexible-Format Optical Modulator with Selectable Combinations of Carrier Numbers and Modulation Levels Based on Silica-PLC and LiNbO 3 Hybrid Integration
Electro-optical Devices Waveguide Modulators Integrated optics devices
2011/5/26
We devised a novel flexible-format optical modulator that can optically select optimum sets of carrier numbers and modulation levels according to transmission conditions. The modulator with PLC-LN hyb...
Distributed MIMO Antenna Architecture for Wireless-over-Fiber Backhaul with Multicarrier Optical Phase Modulation
Coherent communications Phase modulation Radio frequency photonics
2011/5/26
A novel optical phase-modulated wireless-over-fiber backhaul architecture for next generation cellular network is presented and experimentally demonstrated for high capacity wireless multicarrier upli...
31 Gbps RoF System Employing Adaptive Bit-Loading OFDM Modulation at 60 GHz
Optical Communications Modulation
2011/5/26
Record wireless data transmission of 31.4 Gbps within 7 GHz license-free band at 60 GHz is experimentally demonstrated using adaptive bit-loading OFDM modulation. Adaptive bit-loading OFDM also enable...
Impact of the Channel Count on the Nonlinear Tolerance in Coherently-detected POLMUX-QPSK modulation
Coherent communications Fiber optics communications
2011/5/26
GPU-based transmission simulations with different channel counts (1~81) are used to determine the minimum required channel number for correctly simulating fiber nonlinearities that impact 40G/100G CP-...
Optical Modulation Signal Enhancement Using a Phase Sensitive Amplifier
Fiber optic amplifiers oscillators Nonlinear optics parametric processes
2011/5/26
We propose and demonstrate the use of a PSA as a modulation signal enhancer for the first time. It can generate both phase- and amplitude modulated signals from low-extinction inputs.
Three-Dimensional Subcarrier-Multiplexed Nonbinary- LDPC-Coded Modulation Schemes Enabling Ultra High Speed Optical Communications
Fiber optics communications Modulation Low-density parity-check codes
2011/5/25
We propose nonbinary-LDPC-coded modulation schemes employing subcarrier-multiplexing and three-dimensional constellations. We improve coding gains of conventional PDM-M-QAM by 2.17dB and 2.92dB, for M...
First Experimental Demonstration of Nonbinary LDPC- Coded Modulation Suitable for High-Speed Optical Communications
Fiber optics and optical communications Modulation Low-density parity- check (LDPC) codes
2011/5/25
The first experimental demonstration of nonbinary-LDPC-coded optical transmission is presented. Using DQPSK, we can achieve >8dB and ~10dB net coding gains at the BER of 10 -6 in the absence and prese...
On the Reverse Concatenated Coded-Modulation for Ultra- High-Speed Optical Transport
Fiber optics optical communications Reverse concatenated FEC
2011/5/25
We propose reverse concatenated code with inner BCH code and outer LDPC code.BCH decoder is based on MAP-decoding that provides high-accuracy-reliabilities for suboptimum-LDPC-decoder, leading to perf...
40-Gbps Transmission Using Direct Modulation of 1.3-μm AlGaInAs MQW Distributed-Reflector Lasers up to 70oC
Semiconductor lasers
2011/5/25
40-Gbps transmission over 5-km single-mode fiber using a directly modulated 1.3-μm AlGaInAs MQW distributed-reflector laser was demonstrated. Error-free operations up to 70oC have been achieved.
40-Gbps Direct Modulation of 1.3-μ μm InGaAlAs DFB Laser in Compact TO-CAN Package
Semiconductor laser Integrated optics devices
2011/5/25
We developed a compact TO-CAN module with a 1.3-μm InGaAlAs directly-modulated laser. We achieved a record relaxation oscillation frequency slope value of 4.85 GHz/mA 1/2 and a 40-Gbps modulated trans...
We describe the performance of 1.3-μm InGaAlAs RWG-MQW-DFB lasers and EA-DFB lasers applicable to 40G/100G Ethernet. We obtained a 3-dB-down bandwidth frequency of over 30 GHz and clear eye opening at...
803 Mbit/s Visible Light WDM Link based on DMT Modulation of a Single RGB LED Luminary
Free-space optical communication Light-emitting diodes
2011/5/25
We report the first visible light link based on WDM and DMT modulation of a single RGB-type white LED, operating at an aggregate rate of 803 Mbit/s within the FEC 2·10 -3 limit.
Dynamic Routing and Frequency Slot Assignment for Elastic Optical Path Networks that Adopt Distance Adaptive Modulation
Networks assignment routing algorithms All-optical networks
2011/5/25
We propose a dynamic routing and frequency slot assignment algorithm for SLICE networks that employ distance adaptive modulation. We verify that the spectrum utilization penalty that stems from non-un...