搜索结果: 31-45 共查到“光学工程 Modulation”相关记录144条 . 查询时间(0.023 秒)
Robust BPSK Impulse Radio UWB-over-Fiber Systems Using Optical Phase Modulation
Coherent communications Radio frequency photonics
2011/5/22
The impact of fiber dispersion on the performance of optical phase modulated impulse-radio-ultrawideband (IR-UWB) signals is experimentally investigated. 2Gbps BPSK IR-UWB over 78km fiber transmission...
Beyond 2.5Gb/s Photonic Generation and Wireless Transmission of Different Pulse Modulation Formats for a High Speed Impulse Radio UWB over Fiber System
Fiber optics communications Radio frequency photonics
2011/5/22
We experimentally demonstrate beyond 2.5Gbps photonic generation of different pulse modulation formats for impulse radio ultra-wideband (IR-UWB) over fiber application. IR-UWB transmission over 20km f...
System Impacts of Modulation Technology and Phase Noise on Coherent Analog Optical Links
Radio frequency photonics
2011/5/22
We describe an analog optical link using amplitude modulation and coherent detection for high SFDR, gain, and low noise figure. We then address the dominant performance-limiting parameters and discuss...
40 Gb/s Carrierless Amplitude and Phase Modulation for Low-Cost Optical Datacommunication Links
Fiber optics communications Modulation
2011/5/22
4 bps/Hz 40 Gb/s carrierless amplitude and phase (CAP) modulation is investigated for next-generation datacommunication links. The 40 Gb/s link achieves double the length of a conventional NRZ scheme,...
Broadband Wavelength Conversion with S/C/L-band Flexible Operation Using Cross-Gain-Modulation in a Single Quantum Dot SOA
All-optical devices Quantum-well dot devices
2011/5/22
We experimentally demonstrated operating original and converted wavelengths flexible wavelength conversion using cross-gain-modulation in a single quantum dot semiconductor optical amplifier with cove...
Time-Stretch Analog-to-Digital Conversion Using Phase Modulation and Broadband Balanced Coherent Detection for Improving Resolution
Fiber optics links subsystems Radio frequency photonics
2011/5/22
We introduce a novel implementation of time-stretch analog-to-digital conversion which uses phase modulation and balanced coherent detection for improving resolution. Proof of concept experiment demon...
10 Gbit/s modulation of Reflective SOA without any electronic processing
Fiber optics communications Semiconductor optical amplifiers Modulators
2011/5/22
For the first time, we demonstrate that the use of a long RSOA as remote modulator enables short distance transmission on SMF below the FEC limit at 10 Gbit/s without any electronic processing.
Polarization Insensitive Cross-Phase Modulation in 10.5-m Highly Ge-Doped Nonlinear Fiber
Nonlinear optics fibers Fibers polarization-maintaining Highly Ge- doped nonlinear fiber
2011/5/22
We demonstrate for the first time polarization-insensitive cross-phase modulation in a 10.5-m highly-Germanium-doped (75%) nonlinear-fiber. Its high compatibility with standard single mode fiber allow...
Experimental Study of Polarization-Switched-QPSK Subcarrier Modulation and Iterative Demapping on Optical OFDM Systems
multiplex achieved OCIS codes
2011/5/21
We demonstrate application of polarization-switched-QPSK subcarrier modulation together with soft-FEC LDPC coding and iterative demapping on OFDM lab system. 4.5dB OSNR-sensitivity improvement versus ...
Fiber optics communications;Modulation
Coherent communications Nonlinear optics fibers 300.2570 Four-wave mixing
2011/5/21
We show that the performance of a coherently-detected transmission systems employing digital back-propagation is limited by FWM between signal and noise, and demonstrate an excellent agreement between...
Coded modulation schemes for optical transport are reviewed and coding of 4-D constellations is discussed including iterative demapping for soft-detection of polarization-switched QPSK which achieves ...
All-optical OOK to 16QAM Modulation Format Conversion Employing Nonlinear Optical Fiber Loop Mirror
Modulation Nonlinear optical signal processing
2011/5/21
We propose a novel all-optical modulation format conversion scheme from on-off-keying to 16 quadrature amplitude modulation using nonlinear optical loop mirror based on parametric amplification and cr...
First Demonstration of Symmetric 10-Gb/s Access Networks Architecture based on Silicon Microring Single Sideband Modulation for Efficient Upstream Signal Re-modulation
Fiber optics communications Integrated optics devices
2011/5/21
We demonstrate an optical access network utilizing downstream silicon microring single-sideband modulation and upstream phase-remodulation of a centrally distributed carrier. Rayleigh-backscattering i...
All-Optical THz-band Frequency Multiplexing on A Single Optical Carrier Using Fiber Cross-Phase Modulation
Optical THz-band Frequency Multiplexing Single Optical Carrier Fiber Cross-Phase Modulation
2011/5/21
We developed an ultra-broadband all-optical frequency multiplexing technique on asingle optical carrier using cross-phase modulation in nonlinear fibers, and demonstrated sequentially multiplex of mul...
Reconfigurable Digital Coherent Receiver for Metro-Access Networks Supporting Mixed Modulation Formats and Bit-rates
Reconfigurable Digital Receiver Metro-Access Networks Supporting Mixed Modulation Formats Bit-rates
2011/5/20
Single reconfigurable DSP coherent receiver is experimentally demonstrated for mixed-format and bit-rates including QPSK, OFDM, IR-UWB for wireline and wireless signal types. Successful transmission o...