Spectral Efficiency Increase for Passive Backscatter Communication Based on Discrete Pulse Shaping

Waveform Characterization for Spectral Line-by Line Pulse Shaping

We have developd new techniques that enable characterization of ultrafast optical waveforms generated via spectral line-by-line pulse shaping under the Optical Arbitrary Waveform Generation (O-AWG) program. Our approaches simultaneously address a number of challenging requirements not met by existing waveform measurement methods, including high waveform complexity, high spectral resolution, and...

Nonlinear Transmission Performance of Very High Spectral Efficiency WDM Comparing Nyquist Pulse Shaping and OFDM

The long distance transmission performance of Nyquist-WDM and OFDM, using PDM-QPSK at baud rate channel spacing, is investigated over uncompensated single mode fibre. Results show similar performance for both signal formats and good agreement with closed-form expressions for the nonlinear transmission performance of densely spaced coherent optical systems.

Laser Pulse Temporal, Spectral And Spatial Shaping Devices Based On Volume Diffractive Gratings With Variable Parameters

application of upfc based on svpwm for power quality improvement

در سالهای اخیر،اختلالات کیفیت توان مهمترین موضوع می باشد که محققان زیادی را برای پیدا کردن راه حلی برای حل آن علاقه مند ساخته است.امروزه کیفیت توان در سیستم قدرت برای مراکز صنعتی،تجاری وکاربردهای بیمارستانی مسئله مهمی می باشد.مشکل ولتاژمثل شرایط افت ولتاژواضافه جریان ناشی از اتصال کوتاه مدار یا وقوع خطا در سیستم بیشتر مورد توجه می باشد. برای مطالعه افت ولتاژ واضافه جریان،محققان زیادی کار کرده ...

Spectral line-by-line pulse shaping for optical arbitrary pulse-train generation

ulse-shaping techniques, in which user-specified ulrashort pulse fields are synthesized via parallel manipuation of optical Fourier components, are now widely dopted [1]. Among the almost arbitrary waveforms enbled by pulse shaping, one subset with particular appeal nvolves generation and manipulation of optical pulse rains. Discrete pulse train packets (or bursts) have been enerated by both Fo...