搜索结果: 1-15 共查到“光信息技术 Frequency”相关记录32条 . 查询时间(0.065 秒)
Frequency combs are the rulers of light. By counting a wavelength’s many oscillations, they measure distance and time with extraordinary precision and speed.
Since the discovery of optical frequency ...
Choice of the perfectly matched layer boundary condition for frequency-domain Maxwell’s equations solvers
Maxwell’s equations Perfectly matched layer Finite-difference frequency-domain method
2015/8/7
We show that the performance of frequency-domain solvers of Maxwell’s equations is greatly affected by the kind of the perfectly matched layer (PML) used. In particular, we demonstrate that using the ...
Extracavity Parametric Oscillation with Continuous and/or Discontinuous Frequency Tuning
Optical Parametric Oscillator Fabry-Perot Etalon Analog-Digital Converter
2013/1/30
A continuously or/and discontinuously tunable LiNbO3 Optical Parametric Oscillator (OPO) with the spectral range of 1.42 - 4.24 um and shifting of 0…12 nm is created and investigated. The OPO resonato...
This investigation demonstrates the generation of OFDM-RoF signal using frequency doubling technique for the first time, to the author’s best knowledge. The 4-Gb/s OFDM signal using 16-QAM format modu...
Reduced-Guard-Interval CO-OFDM with Overlapped Frequency-Domain CD and PMD Equalization
Reduced-Guard-Interval CO-OFDM Overlapped Frequency-Domain CD PMD Equalization
2015/5/25
We propose an algorithm for CO-OFDM receivers to perform overlapped frequency-domain CD and PMD equalization before OFDM symbol demodulation. This approach enables OFDM transmission with a small cycli...
Generation of Stable and High-Quality Multicarrier Source Based on Re-circulating Frequency Shifter for Tb/s Optical Transmission
Fiber optics communications Frequency modulation
2015/5/25
We theoretically and experimentally study the impact of implementation imperfections on the quality of multicarrier sources generated by re-circulating frequency shifting. Based on an optimized design...
Dynamic Routing and Frequency Slot Assignment for Elastic Optical Path Networks that Adopt Distance Adaptive Modulation
Networks assignment routing algorithms All-optical networks
2015/5/25
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...
Flexible-Bandwidth, Impairment-Aware Transmitter Based on Parallel Synthesis of Optical Frequency Combs
Optical communications All-optical networks Systems
2015/5/22
We demonstrate a proof-of-principle transmitter for flexible-bandwidth network with parallel synthesis and a wavelength-selective switch. Impairment-aware spectrum allocation is used to maintain data ...
Ultra-High Data-Rate 60 GHz Radio-over-Fiber Systems Employing Optical Frequency Multiplication and Adaptive OFDM Formats
Optical Communications Modulation
2015/5/21
This paper reviews 60-GHz radio-over-fiber systems employing optical frequency multiplication and adaptive OFDM signals with multi-level modulation formats to achieve an ultra-high data rate of up to ...
Transmission Experiment Using a Coupled-Cavity VCSEL for Radio Frequency Conversion
Transmission Experiment Coupled-Cavity VCSEL Radio Frequency Conversion
2015/5/21
We perform a transmission experiment using a coupled-cavity VCSEL and demonstrate its unique ability for radio frequency conversion. For a short-reach link, the system performance is governed by the d...
Complexity versus Performance Tradeoff for Fiber Nonlinearity Compensation Using Frequency-Shaped, Multi-Subband Backpropagation
optics, fibers Nonlinear optical signal processing Wave propagation
2015/5/21
We investigate the use of an enhanced backpropagation algorithm where subbanding and frequency-shaping by pre- and post-filters are used in the calculation of nonlinearity to enable larger step sizes ...
Non-Data-Aided Wide-Range Frequency Offset Estimator for QAM Optical Coherent Receivers
Non-Data-Aided Wide-Range Frequency Offset Estimator QAM Optical Coherent Receivers
2015/5/20
We propose and experimentally demonstrate a novel blind frequency offset estimator for coherent quadrature amplitude modulation (QAM) receivers. Its frequency offset estimation range is more than thre...
Instantaneous Frequency Measurement with Digital Outputs Based on An Optical Filter Array
Optical Filter Digital Output Instantaneous Frequency Measurement
2015/5/15
A photonic approach using an optical filter array is proposed to perform instantaneous frequency measurement with digital outputs. 4-bit digital outputs are then experimentally demonstrated within the...
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 ...