搜索结果: 136-150 共查到“工学 Phase”相关记录542条 . 查询时间(0.128 秒)
320 Gb/s Phase-Transparent Wavelength Conversion in a Silicon Nanowire
Fiber optics communications Wavelength conversion devices
2015/5/25
All-optical wavelength conversion for a 320 Gb/s RZ-DPSK signal is demonstrated based on four wave mixing in a silicon nanowire. BER better than 10 -9 is achieved for the wavelength converted RZ-DPSK ...
Photonic chip based all-optical XOR gate for phase-encoded signals
Nonlinear optical signal processing Nonlinear optics devices
2015/5/25
We demonstrate error-free, no power penalty, all-optical XOR operation for 40 Gbit/s phase-encoded signals in a highly-nonlinear photonic chip. This scheme exploits the Kerr nonlinearity in a dispersi...
Amplitude Regeneration of Phase Encoded Signals Using Injection Locking in Semiconductor Lasers
Lasers and laser optics Lasers injection-locked
2015/5/25
A phase preserving limiter based on injection locking in semiconductor lasers is experimentally investigated for 10Gb/s phase encoded signals. The proposed scheme exhibits significant amplitude noise ...
Constant Envelope Optical OFDM for Improved Nonlinear and Phase Noise Tolerance
Fiber optics communication Phase Modulation
2015/5/25
We introduce a new concept of OFDM transmission with constant envelope and coherent detection to reduce the sensitivity of OFDM signals to nonlinear effects and phase noise.
Robust BPSK Impulse Radio UWB-over-Fiber Systems Using Optical Phase Modulation
Coherent communications Radio frequency photonics
2015/5/22
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...
System Impacts of Modulation Technology and Phase Noise on Coherent Analog Optical Links
Radio frequency photonics
2015/5/22
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
2015/5/22
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,...
Demonstration of Cascadability and Phase Regeneration of SOA-Based All-Optical DPSK Wavelength Converters
Wavelength conversion devices Semiconductor optical amplifiers
2015/5/22
We experimentally demonstrate cascadable regeneration of 10Gb/s DPSK signals by using a two-fold cascade of SOA-based wavelength converters. No additional power penalty and 3dB OSNR improvement are ob...
Nonlinearity and Phase Noise in High-Current Photodetectors
Photodetectors Radio frequency photonics
2015/5/22
Great progress has been made in the past decade in developing high-current photodetec-tors, but the modeling of these devices has not kept pace. The status of the devices and the models is reviewed.
Time-Stretch Analog-to-Digital Conversion Using Phase Modulation and Broadband Balanced Coherent Detection for Improving Resolution
Fiber optics links subsystems Radio frequency photonics
2015/5/22
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...
Phase Sensitive Degenerate Parametric Amplification Using Highly Efficient PPLN Ridge Waveguides
Nonlinear optics parametric processes Lithium niobate
2015/5/22
We constructed the first CW pumped degenerate parametric amplifier based on PPLN waveguides. We successfully demonstrated an in-phase gain of +11 dB and the phase sensitive amplification of a modulate...
Phase-Sensitive Wavelength Conversion Based on Cascaded Quadratic Processes in Periodically Poled Lithium Niobate Waveguides
Optical communications Lithium niobate Nonlinear optics parametric processes Nonlinear optical devices
2015/5/22
We propose and experimentally demonstrate a novel scheme of phase-sensitive wavelength conversion, based on a combination of cascaded second-order nonlinear effects in two cascaded periodically poled ...
SPIDER on a chip: a phase sensitive ultrafast oscilloscope
Glass waveguides Integrated optics materials Nonlinear wave mixing
2015/5/22
We present a device for full waveform characterization, exploiting FWM in a CMOS compatible photonic chip, working with pulse energies as low as 10pJ and with sub-picosecond (<700fs) accuracy over a 1...
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
2015/5/22
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...
Optimization of 16-point Ring Constellations in the Presence of Nonlinear Phase Noise
Fiber optics communications Coherent communications
2015/5/21
The optimum radius distribution in terms of the average symbol error rate (SER)for different 16-pointsignal sets is derived numericallyfor a fiber channel limited by nonlinear phase noise. The results...