162,107 research outputs found
Discretely tunable comb spacing of a frequency comb by multilevel phase modulation of a periodic pulse train
No full textAzana corsicana Coher 1995
No full text115. Azana corsicana Coher, 1995 ** Material examined. S1 4–18.IV.06 1 ♂. S2 21.III–4.IV.06 1 ♂. SAR1 16.II–15.VI.04 1 ♂, 29.IV–20.V.05 1 ♂. Chorotype. Type 6 [3.02 of Vigna Taglianti et al. (1999)]. Mediterranean. Italian distribution. Sardinia only. Notes. Previously known only from the Corsican type material.Published as part of Chandler, Peter J., 2009, The fungus gnats (Diptera: Bolitophilidae, Keroplatidae, Mycetophilidae) of Sardinia, with description of six new species * in Zootaxa 231
[Report to Chief J. E. Curry, by an unknown author #1]
No full textReport to Chief J. E. Curry, by an unknown author. The report contains a list of officers who gave depositions to the United States Attorney
[Report to Chief J. E. Curry, by an unknown author #2]
No full textReport to Chief J. E. Curry, by an unknown author. The report contains a list of officers who gave depositions to the United States Attorney
Fiber-Based Programmable Picosecond Optical Pulse Shaper
No full textWe experimentally demonstrate a fiber-optic programmable optical pulse shaper based on time-domain binary phase-only linear filtering, which is capable of switching picosecond pulse shapes at unprecedented sub-GHz rates by simply updating the binary signal driving an electro-optic phasemodulator (EO-PM). The required binary phase-filtering functions are computed using a genetic algorithm (GA). One limitation of the binary phase-filtering approach is the inherent symmetry of the output temporal shapes. To generate fully arbitrary time-domain intensity profiles (including asymmetric temporal waveforms) we must employ a multi-level phasefiltering function. However, the size of the solution-space and complexity of the computation multiplies to manifolds as the number of levels in the phase-filtering function increases. Here we numerically demonstrate a simple strategy, by combining the Gerchberg-Saxton algorithm (GSA) and GA, for the fast computation of multi-level phase-filtering functions. The performance of this approach is numerically proven by generating different asymmetric pulse shapes of practical interest, assuming experimentally feasible design parameters
Temporal Phase and Amplitude Reconstruction of Picosecond Pulses by All-Optical Differentiation and Sampling
No full textTapered two-wire waveguide for time-domain integration of broadband terahertz pulses
No full textWe show the time-domain integration of terahertz pulses achieved in a sub-wavelength, tapered two-wire waveguide. Both simulation and experimental results prove the time integration functionality of this waveguide topology
Time-Domain Integration of Broadband Terahertz Pulses via Tapered Two-Wire Waveguide
No full textIn this work, we report on the implementation of a time-domain integrator device operating on arbitrary broadband Terahertz (THz) pulses. This analog signal-processing functionality is implemented by employing a two-wire waveguide (TWWG) variant, based on a tapered configuration. A conventional TWWG is made of two copper wires separated by an air gap between them. Here, we show here that, if the gap between the wires is much smaller than the THz wavelength and the wire radius, the propagating THz field undergoes a field enhancement factor that is inversely proportional to the THz frequency, thus matching with the spectral behavior of a time-domain integrator. Both simulation and experimental results here demonstrate that the tapered TWWG (briefly, TTWWG) is indeed able to perform the time-domain integration functionality
Time-Domain Integration of Terahertz pulses
No full textWe report on the time-domain integration of terahertz pulses obtained via the tight confinement of the radiation in a tapered two-wire waveguide. Both simulation and experimental results prove the time integration capability of this structure
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