High-resolution, ultrafast laser pulse shaping and its applications

Tull, J. X.; Dugan, Mark; Warren, W. S.

doi:10.1016/s1057-2732(97)80002-2

Cited by 86 publications

(46 citation statements)

References 59 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…One beam is sent to the pulse shaper, and the other is used as an unshaped reference for spectral interferometry measurements of the shaped pulses [11]. The pulse shaper consists of a zero dispersion stretcher with an acousto-optic modulator (AOM) in the Fourier plane, where different colors in the light pulse map to different positions on the modulator [12]. The AOM carries a shaped acoustic traveling wave, which diffracts different colors with different phases and amplitudes.…”

Section: Methodsmentioning

confidence: 99%

Coherent control using adaptive learning algorithms

et al. 2001

View full text Add to dashboard Cite

We have constructed an automated learning apparatus to control quantum systems. By directing intense shaped ultrafast laser pulses into a variety of samples and using a measurement of the system as a feedback signal, we are able to reshape the laser pulses to direct the system into a desired state. The feedback signal is the input to an adaptive learning algorithm. This algorithm programs a computer-controlled, acousto-optic modulator pulse shaper. The learning algorithm generates new shaped laser pulses based on the success of previous pulses in achieving a predetermined goal.

show abstract

Section: Methodsmentioning

confidence: 99%

Coherent control using adaptive learning algorithms

et al. 2001

View full text Add to dashboard Cite

show abstract

“…There is a variety of these devices. In our case, an acousto-optic modulator (AOM) is the method of choice [45]. SLMs allow us to manipulate the phase and amplitude of adjacent frequency components.…”

Section: Pulse Shapingmentioning

confidence: 99%

Strong‐Field Coherent Control

Shapiro

Brumer

2011

Quantum Control of Molecular Processes

View full text Add to dashboard Cite

The work presented in this thesis is geared towards the understanding of coherent control in molecules and atoms in strong fields. The analysis is done by studying multiphoton transitions. We present a theoretical model that describes multiphoton transitions under strong fields. We show that in order to achieve population inversion a phase-matching condition between the laser and the atom needs to be satisfied. This phase matching condition shows that fields need to be tailored taking into account the presence of the dynamic stark shift (DSS) effect and compensating for it. These findings are corroborated by experimental results and simulations. Experimentally, we used a genetic algorithm (GA) to find pulse shapes that can efficiently excite atomic Na to the 4s state by means of a two photon absorption. The solutions found by the GA are used directly to integrate Schrödinger's equations for the amplitudes. The results of using this scheme ratify our theoretical model. We also map how the transition from the weak to the strong field limit occurs for two and three level systems in the presence of multiphoton transitions. Here, we show that the perturbative solutions are a particular case of our model and they are recovered in iii

show abstract

“…Programmable pulse shaping based on the use of an acousto-optic modulator has been developed by Warren and co-workers [88][89][90][91]. The apparatus is depicted in Fig.…”

Section: Pulse Shaping With Aomsmentioning

confidence: 99%