Programmable shaping of femtosecond optical pulses by use of 128-element liquid crystal phase modulator

Weiner, Andrew M.; Leaird, Daniel E.; Patel, Jay; Wullert, John R.

doi:10.1109/3.135209

Cited by 477 publications

(228 citation statements)

References 30 publications

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“…To modify the spectral components of the pulses we use a pulse shaper that allows independent phase and amplitude modulation [25]. It consists of a liquid crystal modulator (CRI; SLM-256) [26] with 2x128 pixels, placed in the Fourier plane of a double grating zero dispersion compressor. A lens focuses the beam to a spot of 150 µm diameter at the center of the trap, illuminating about 10% of the cloud volume.…”

Section: Methodsmentioning

confidence: 99%

Coherent control with shaped femtosecond laser pulses applied to ultracold molecules

et al. 2006

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We report on coherent control of excitation processes of translationally ultracold rubidium dimers in a magneto-optical trap by using shaped femtosecond laser pulses. Evolution strategies are applied in a feedback loop in order to optimize the photoexcitation of the Rb2 molecules, which subsequently undergo ionization or fragmentation. A superior performance of the resulting pulses compared to unshaped pulses of the same pulse energy is obtained by distributing the energy among specific spectral components. The demonstration of coherent control to ultracold ensembles opens a path to actively influence fundamental photo-induced processes in molecular quantum gases.

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Section: Methodsmentioning

confidence: 99%

Coherent control with shaped femtosecond laser pulses applied to ultracold molecules

et al. 2006

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“…2a. It must be emphasized, that these changes of the pulse envelope are fundamentally different from the well-known and widely used mapping of the spectral amplitude to the time domain for strongly chirped pulses, where only the dominant, second-order phase coefficient plays any role [3]. Further details of this 'skew-flip' behavior can be examined in the three panels of Fig.…”

Section: Skew Of Optical Pulsesmentioning

confidence: 99%

Asymmetric Pulse Shapes in Grating-Based CPA Compressors and Optimal Electron Acceleration in Plasmas

Tóth

Faure

Tilborg

et al. 2004

Springer Series in OPTICAL SCIENCES

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“…The application of OCT to quantum mechanics started in the 1980s [2,3,4,5]. Due to the enormous progress in the shaping of laser fields [6], the control of chemical reactions became within reach. Experiments using closed loop learning (CLL) [7] delivered highly convincing results [8,9,10,11].…”

Section: Introductionmentioning

confidence: 99%

Optimal control of time-dependent targets

2005

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In this work, we investigate how and to which extent a quantum system can be driven along a prescribed path in Hilbert space by a suitably shaped laser pulse. To calculate the optimal, i.e., the variationally best pulse, a properly defined functional is maximized. This leads to a monotonically convergent algorithm which is computationally not more expensive than the standard optimalcontrol techniques to push a system, without specifying the path, from a given initial to a given final state. The method is successfully applied to drive the time-dependent density along a given trajectory in real space and to control the time-dependent occupation numbers of a two-level system and of a one-dimensional model for the hydrogen atom.

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Programmable shaping of femtosecond optical pulses by use of 128-element liquid crystal phase modulator

Cited by 477 publications

References 30 publications

Coherent control with shaped femtosecond laser pulses applied to ultracold molecules

Coherent control with shaped femtosecond laser pulses applied to ultracold molecules

Asymmetric Pulse Shapes in Grating-Based CPA Compressors and Optimal Electron Acceleration in Plasmas

Optimal control of time-dependent targets

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