Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 7 of 7 for “"Train of pulses"”.
-
Interaction of a finite train of short optical pulses with a ladder system
… we try to improve our understanding of the interaction of atomic and molecular ladder systems with short optical pulses. A train of pulses produced by shaping the spectral phase of a single pulse from an ultra fast laser allows us to control the step-wise excitation in rubidium (Rb) …
-
Millimeter-Wave and Sub-Terahertz Parametric Harmonic Generation
The theory of parametric harmonic generation is described in this thesis. It is shown that for Nth-order harmonic generation the time-varying parameter (P), such as elastance (S), capacitance (C), conductance (G), or resistance (R), exhibits N−1 periods of a sine wave under one sinusoidal pumping …
-
Adaptively shaped advanced ultrafast laser sources
The aim of the work presented in this thesis is to investigate adaptively shaped advanced ultrafast laser sources in the near-(NIR) and the mid-infrared (MIR) regimes. The setup involves shaping a NIR pulse using an adaptively controlled liquid crystal spatial light modulator (LC-SLM) in a pulse …
-
Manipulating atoms and molecules with frequency combs
… discusses decelerating atomic beams using pulse trains, and studies the possibility of cooling atoms or molecules using frequency combs. Using frequency combs in laser cooling of multilevel systems may eliminate the need for multiple lasersources, which are currently required to pump the …
-
Activity and Structure of Auditory Brain Neurons Underlying Phonotactic Behaviour in Female Crickets
… question in cricket neurobiology is what kind of neuronal mechanism the females use, to recognise the temporal pattern of the male calling song. A delay-line and coincidence detector circuit with five neurons underlying auditory pattern recognition in the bi-spotted cricket Gryllus bimaculatus …
-
Numerical and Experimental Study of the Trichel Pulses in Needle-plane Geometry
One of the unique aspects of the negative corona discharges in the air is the regular train of pulses that form the discharge current, called Trichel pulses. These pulses are the result of the combination of several phenomena such as the avalanche ionization of the neutral molecules by the impact …
-
Waveform design and processing techniques in OFDM radar
With the advent of powerful digital hardware, software defined radio and radar have become an active area of research and development. This in turn has given rise to many new research directions in the radar community, which were previously not comprehensible. One such direction is the recently …