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Optical brain imaging using functional near infra-red spectroscopy (fNIRS) offers a portable and noninvasive tool for monitoring of blood oxygenation. In this paper we have introduced a new miniaturiz...
A linearized parametric sampling gate was constructed to explore its performance limits in an analog-to-digital conversion (ADC) architecture. Linear response of the sampling gate can be achieved both...
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 ...
A self-reference characterization technique is demonstrated for simultaneously measuring instantaneous frequencies of multi-wavelength optical signals using a single measurement platform. The techniqu...
Recent advances in polychromatic sampling are reviewed in context of the multicast pa-rametric synchronous sampling architecture of waveforms and real-time processing of high bit-rate signals. Operati...
A method for the real-time monitoring of the modal content of a monolithic LMA fiber laser is reported for the first time. It allows for the direct observation of the dynamics of transversal mode comp...
We demonstrate real-time reception of a 110-Gb/s multi-band OFDM signal after transmission of 600-km SSMF fiber and 400-ps differential-group-delay. The performance of 110-Gb/s CO-OFDM signal is chara...
We characterize a single-ended intradyne receiver’s performance when multiple channels are received without optical demultiplexing. A 40Gb/s dual-polarization QPSK channel is recovered from 16 interfe...
A method employing a unique mixture of microwave and digital signal processing is described that provides for large bandwidth increases in waveform digitizers. Such digitizers are a critical component...
A novel frequency offset estimator is proposed and implemented in a 1Gbit/s real-time coherent receiver to demonstrate all-digital frequency offset compensation up to ±0.4 symbol rate.
We report a real-time optical OFDM transmitter with the highest sampling rate to date. Generation and transmission of an 8.36Gb/s digitally up-converted single sideband OFDM signal over 1600km of unco...
Real-time optical OFDM transceivers are, for the first time, experimentally implemented, using standard commercially available components including FPGAs and DACs/ADCs. The transceivers support 1.5Gb/...
Recent results of real-time coherent optical OFDM receiver are reviewed. Requirements and challenges pertaining to high-speed real-time implementation of CO-OFDM receiver are discussed. An implemented...
Real-time implementation of a DMT transmitter in FPGA is demonstrated for low-cost, standard 1-mm step-index plastic optical fiber applications based on commercial resonant-cavity LED and large-diamet...
In the International Thermonuclear Experimental Reactor (ITER), pipe welding/cutting has to be carried out under severe gamma-ray conditions in a limited space inside the pipe. A laser and image trans...

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