搜索结果: 1-13 共查到“光学工程 FREQUENCY DOMAIN”相关记录13条 . 查询时间(0.078 秒)
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 ...
Frequency-Domain Equalization for Coherent Optical Transmission Systems
Coherent communications Fiber optics links subsystems
2015/5/26
Frequency-domain equalization (FDE) has been attracting much attention for high-speed long-haul transmission over fiber-optic channels. Two FDE configurations for coherent optical transmission are pre...
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...
Scattered Pilot Channel Tracking Method for PDM-CO- OFDM Transmissions Using Polar-Based Intra-Symbol Frequency-Domain Average
Fiber optics communications Modulation
2015/5/25
We have demonstrated an efficient scattered pilot channel tracking approach with a new polar-based intra-symbol frequency domain average (ISFA) for 16-QAM, 40-Gb/s PDM-CO-OFDM systems. This proposal c...
Cyclic Prefix Free 10-Gb/s OFDM for a DML-Based Long- Reach Optical Access Using Joint Time and Frequency Domain Equalization Algorithm
Fiber optics links subsystems Modulation
2015/5/25
Without using a cyclic prefix, a DML-based 10-Gb/s OFDM at 2.5-GHz bandwidth transmission over 65-km SMF is demonstrated to be possible while maintaining the efficient throughput and short-latency tim...
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...
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.
Frequency Domain Chromatic Dispersion Estimation
Coherent communications Fiber optics communications
2015/6/4
The low complexity, robust, and precise algorithm solely employs a simplified auto-correlation function of the signal spectrum for blind chromatic dispersion estimation to adapt fre-quency domain comp...
Time and Frequency Domain Investigations on Ultrafast Photoreaction Dynamics of Photoactive Yellow Protein（PYP）
Photoactive Yellow Protein (PYP) Fs fluorescence spectroscopy Resonance Raman spectroscopy
2009/6/8
Low frequency vibrations of the native PYP and related systems in solution have been investigated in "time" (fs fluorescence up-conversion) and "frequency" (resonance Raman) domains to elucidate their...
Evolution of Backscattered Polarization in High-PMD Fibres Measured by Phase-Noise Compensated Optical Frequency Domain Reflectometry
Backscattered Polarization High-PMD Fibres Measured Phase-Noise Compensated Optical Frequency Domain Reflectometry
2015/8/4
The evolution of backscattered polarization in high-PMD fibres is measured by phase-noise compensated optical frequency domain reflectometry with a 25 cm spatial resolution and a 7.5 km measurement ra...
40-km Range, 1-m Resolution Measurement Based on Phase-noise- compensated Coherent Optical Frequency Domain Reflectometry
Resolution Measurement Phase-noise-compensated Coherent Optical Frequency Domain Reflectometry
2015/8/4
We present 40-km range, 1-m spatial resolution and highly sensitive measurement based on phase-noise-compensated OFDR that employs a concatenative reference method.
Integrated Frequency-Domain Optical CDMA Modulator Using Hybrid Assembly Technique with Silica PLCs and LN Phase Modulator
Integrated Frequency-Domain Optical CDMA Modulator Hybrid Assembly Technique Silica PLCs LN Phase Modulator
2015/8/3
A frequency-domain OCDMA modulator is developed by integrating PLC encoders with LN modulators. This modulator can hold data signals in phase to carry out self-homodyne detection to reduce beat noise.
Coherent Optical Transmission with Frequency-domain Equalization
Optical Transmission Frequency-domain Equalization
2015/8/3
We demonstrated 25-Gb/s (21.7-Gb/s after coding) single-carrier (SC) transmission with QPSK format over 240km of SMF (4080ps/nm) by employing frequency-domain equalization (FDE).