A newcomer's guide to ultrashort pulse shaping and characterization

Monmayrant, Antoine; Weber, Sébastien J.; Chatel, Béatrice

doi:10.1088/0953-4075/43/10/103001

Cited by 242 publications

(186 citation statements)

References 195 publications

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“…(9) are the permanent electric dipole (PED) and static molecular polarizability (SMP) terms, respectively. The PED term is merely the charge distribution of the field-free molecule.…”

Section: Modeling the Field/molecule Interactionmentioning

confidence: 99%

“…In 1992 Judson and Rabitz 7 described a novel method of combining adjustable spectral pulse shapers 8,9 with evolutionary algorithms 10 in closed-loop schemes that could generate shaped laser pulses for driving molecular systems into desired states. While this technique has been demonstrated and employed successfully in a number of experimental applications, 5,[11][12][13][14][15][16] the complexity of the systems, and of the pulses that are generated via this kind of "black box" optimization approach, makes it difficult to ascertain the mechanisms behind the interaction dynamics.…”

Section: Introductionmentioning

confidence: 99%

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Non-resonant dynamic stark control of vibrational motion with optimized laser pulses

Thomas

Henriksen

2016

The Journal of Chemical Physics

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The term dynamic Stark control (DSC) has been used to describe methods of quantum control related to the dynamic Stark effect, i.e., a time-dependent distortion of energy levels. Here, we employ analytical models that present clear and concise interpretations of the principles behind DSC. Within a linearly forced harmonic oscillator model of vibrational excitation, we show how the vibrational amplitude is related to the pulse envelope, and independent of the carrier frequency of the laser pulse, in the DSC regime. Furthermore, we shed light on the DSC regarding the construction of optimal pulse envelopes — from a time-domain as well as a frequency-domain perspective. Finally, in a numerical study beyond the linearly forced harmonic oscillator model, we show that a pulse envelope can be constructed such that a vibrational excitation into a specific excited vibrational eigenstate is accomplished. The pulse envelope is constructed such that high intensities are avoided in order to eliminate the process of ionization.

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“…(9) are the permanent electric dipole (PED) and static molecular polarizability (SMP) terms, respectively. The PED term is merely the charge distribution of the field-free molecule.…”

Section: Modeling the Field/molecule Interactionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Non-resonant dynamic stark control of vibrational motion with optimized laser pulses

Thomas

Henriksen

2016

The Journal of Chemical Physics

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“…The temporal shape of the speckle is retrieved with an Interferometric Cross-Correlation (ICC) measurement between the stretched pulse and an ultrashort reference by scanning the reference arm. The temporal envelope of this signal is then retrieved by applying a low pass filter in the Fourier domain [33].…”

mentioning

confidence: 99%

Spatiotemporal Coherent Control of Light through a Multiple Scattering Medium with the Multispectral Transmission Matrix

et al. 2016

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We report broadband characterization of the propagation of light through a multiply scattering medium by means of its Multi-Spectral Transmission Matrix. Using a single spatial light modulator, our approach enables the full control of both spatial and spectral properties of an ultrashort pulse transmitted through the medium. We demonstrate spatiotemporal focusing of the pulse at any arbitrary position and time with any desired spectral shape. Our approach opens new perspectives for fundamental studies of light-matter interaction in disordered media, and has potential applications in sensing, coherent control and imaging.Propagation of coherent light through a scattering medium produces a speckle pattern at the output [1], due to light scrambling by multiple scattering events [2]. The phase and amplitude information of the light are spatially mixed, thus limiting resolution, depth and contrast of most optical imaging techniques. Ultrashort pulses, generated by broadband modelocked lasers, are very useful for multiphotonic imaging and non-linear physics [3][4][5]. In the temporal domain, an ultrashort pulse is temporally broadened during propagation in a scattering medium, due to the long dwell time within it [6,7], which therefore limits its range of applications.However, this scattering process is linear and deterministic. Therefore, one can control the input wavefront to design the output field. In this respect, spatial light modulators (SLMs) offer more than a million degrees of freedom to control the propagation of coherent light. These systems have played an important role in the development of wavefront shaping techniques to manipulate light in complex media. Iterative optimization algorithm [8][9][10] and phase conjugation methods [11,12] have been proposed to focus light at a given output position, an essential ingredient for imaging. An alternative method for light control is the optical transmission matrix (TM). The TM is a linear operator that links the input field (SLM) to the output field (CCD camera) [1,13]. The measurement of the TM allows imaging through [15] or inside a scattering medium [16], and potentially access mesoscopic properties of the system [17].The possibility of shaping the pulse in time is also essential for coherent control [18]. Temporally, photons exit a scattering medium at different times, giving rise to a broadened pulse at its output [7,19]. Temporal spreading of the original pulse is characterized by a confinement time τ m [20] related to the Thouless time [21]. Equivalently, from a spectral point of view, the scattering medium responds differently for distinct spectral components of an ultrashort pulse, with a spectral correlation bandwidth ∆ω m ∝ 1/τ m , giving rise to a very complex spatio-temporal speckle pattern [22][23][24][25]. With a single SLM, one can manipulate spatial degrees of freedom to adjust the delay between different optical paths. Therefore spatial and temporal distortions can be both compensated using wavefront shaping techniques. This approach allows th...

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“…Rapid progress in pulse shaping technology [1][2][3][4][5][6] has made it possible to control the temporal as well as the spectral profiles of optical fields. The external optical field induces a polarization in matter that results in the electromagnetic response that is registered by the detection setup [7].…”

Section: Introductionmentioning

confidence: 99%

“…The external optical field induces a polarization in matter that results in the electromagnetic response that is registered by the detection setup [7]. Time-resolved detection is natural when the incoming pulsed fields are much shorter than the relevant molecular time scales [3][4][5]. A frequency-resolved detection is used [6] for stationary fields.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear spectroscopy with time- and frequency-gated photon counting: A superoperator diagrammatic approach

Dorfman

Mukamel

2012

Phys. Rev. A

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We present a diagrammatic technique for calculating quantum-detected nonlinear optical signals using loop diagrams that act in the joint matter plus field space. This formalism, which is based on time ordered superoperators keeps track of the entangled matter plus field state, making it most suitable for spectroscopy applications. Photon counting is recast as a time and frequency convolution of a bare signal, which is given by a correlation function of matter, and a gating spectrogram.

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A newcomer's guide to ultrashort pulse shaping and characterization

Abstract: This tutorial gives an overview of the most widespread techniques of both ultrashort pulse shaping and pulse characterization.

Cited by 242 publications

References 195 publications

Non-resonant dynamic stark control of vibrational motion with optimized laser pulses

Non-resonant dynamic stark control of vibrational motion with optimized laser pulses

Spatiotemporal Coherent Control of Light through a Multiple Scattering Medium with the Multispectral Transmission Matrix

Nonlinear spectroscopy with time- and frequency-gated photon counting: A superoperator diagrammatic approach

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