搜索结果: 61-75 共查到“光学工程 Coherent”相关记录206条 . 查询时间(0.093 秒)
Exponential suppression of thermal conductance using coherent transport and heterostructures
Exponential suppression thermal conductance coherent transport heterostructures
2015/8/10
We consider coherent thermal conductance through multilayer photonic crystal heterostructures, consisting of a series of cascaded nonidentical photonic crystals. We show that thermal conductance can b...
We consider application of the discrete Fourier transform-spread orthogonal frequency-division multiplexing (DFT-spread OFDM) technique to high-speed fiber optic communications. The DFT-spread OFDM is...
Efficient Frequency Domain Chromatic Dispersion Compensation in a Coherent Polmux QPSK-Receiver
Coherent communications Optical Communications
2015/6/10
We investigate frequency domain chromatic dispersion equalization in an ASIC for digital coherent signal processing. Improved chromatic dispersion tolerance can be achieved by using modified coefficie...
Novel Ultra Wide-Range Frequency Offset Estimation for Digital Coherent Optical Receiver
Optical communications Coherent communication Phase modulation
2015/6/10
We propose and experimentally demonstrate a novel, dual-stage frequency offset estimator and achieve the widest range of ±0.5 times the system symbol rate for the first time in a 42.8-Gbit/s coherent ...
Frequency Domain Equalization with Minimum Complexity in Coherent Optical Transmission Systems
Fiber optics links subsystems Optical communications
2015/6/10
For chip-design of a frequency-domain equalizer, a simple procedure to minimize the number of multiplications is shown. Considerations include recent improvements of FFT-algorithms.
High-Power and Low Phase Noise Full-band Tunable LD for Coherent Applications
Semiconductor lasers Lasers tunable
2015/6/10
High output power and low noise performances of CSG-DR-LD have been investigated. Kink-free fiber output power > 60mW over C-band with high SMSR have been demonstrated. Measured phase noise is lower t...
High Performance Photonic Integrated Circuits for Coherent Fiber Communication
Fiber optics communications Integrated optics devices
2015/6/10
Advanced modulation format transmitters and receivers used in optical coherent systems are highly complex, containing many interconnected elements. Photonic integration can reduce the footprint, cost,...
Efficient Digital Coherent Detection of A 1.2-Tb/s 24- Carrier No-Guard-Interval CO-OFDM Signal by Simultaneously Detecting Multiple Carriers Per Sampling
Coherent communications Phase modulation
2015/6/10
We experimentally demonstrate efficient detection of a 1.2-Tb/s 24-carrier NGI-CO-OFDM signal with 12.5-Gbaud PDM-QPSK carrier-modulation by simultaneously recovering 2 or 3 carriers per 50-GSamples/s...
Polarization-Dependent Loss Induced Penalties in PDM-QPSK Coherent Optical Communication Systems
Fiber optics communications Coherent communications Polarization
2015/6/10
We evaluate PDL-induced penalties in PDM-QPSK coherent systems with both lumped model and distributed model. We find the lumped model significantly over-estimates PDL penalties and PDM coherent system...
Nonlinear Polarization Crosstalk Canceller for Dual-Polarization Digital Coherent Receivers
Optical communications Coherent communication
2015/6/10
A novel method is proposed to compensate polarization crosstalk induced by inter-channel nonlinearity. Experiments have demonstrated that the proposed method provides over 1 dB performance improvement...
Coherent State Quantum Key Distribution with Continuous-Wave Laser Beams
Quantum optics Optical security encryption Quantum communications
2015/6/10
Continuous variable quantum key distribution relies on the transmission of weakly modulated coherent states and the detection of optical field for secure communication. In this talk, we give an overvi...
Continuous,Real-Time,Full-Field Waveform Measurements via Spectral Slicing and Parallel Digital Coherent Detection
Homodyning Phase measurement Ultrafast measurements
2015/6/10
Single-shot, amplitude and phase characterization of 160-GHz bandwidth optical wave-forms with 2-μs record lengths using a bandwidth- and time-record scalable technique based on parallelized balanced ...
Dual- versus single-carrier configuration for 40 Gb/s coherent BPSK-based solutions over low dispersion fibers
coherent communication optical communication
2015/6/9
We experimentally compare the performance of BPSK-based dual- and single-carrier coherent solutions at 40 Gb/s over low-dispersion fiber. We show that the single-carrier solution is more tolerant to c...
Experimental Study on Broadband Nonlinear Phase Wandering in Coherent Detection Long-Haul Transmissions
Coherent communications Fiber optics communications
2015/6/9
We investigate fast phase wandering observed in coherent detection long-haul transmission experiments. We demonstrate the phase wandering is a broadband nonlinear effect.We compare its impact on diffe...
Passive Decoy State Quantum Key Distribution with Coherent Light
Quantum communications Quantum cryptography Photon statistics.
2015/6/9
We propose a simple method for passive preparation of decoy states in quantum key distribution with coherent light. It involves linear optics together with a photo-detector. The performance is compara...