Two-time coherence of pulse trains and the integrated degree of temporal coherence

2015 ◽  
Vol 32 (9) ◽  
pp. 1631 ◽  
Author(s):  
Rahul Dutta ◽  
Ari T. Friberg ◽  
Göery Genty ◽  
Jari Turunen
Keyword(s):  
Temporal Coherence ◽  
Pulse Trains

Temporal coherence and polarization modulation of pulse trains by resonance gratings

2019 ◽  
Vol 37 (1) ◽  
pp. 27
Author(s):  
Henri Pesonen ◽  
Peng Li ◽  
Tero Setälä ◽  
Jari Turunen
Keyword(s):  
Temporal Coherence ◽  
Polarization Modulation ◽  
Pulse Trains

Michelson’s interferometer and the temporal coherence of pulse trains

2015 ◽  
Vol 40 (2) ◽  
pp. 166 ◽  
Author(s):  
Rahul Dutta ◽  
Jari Turunen ◽  
Ari T. Friberg
Keyword(s):  
Temporal Coherence ◽  
Pulse Trains

Temporal coherence characterization of supercontinuum pulse trains using Michelson’s interferometer

2016 ◽  
Vol 55 (12) ◽  
pp. B72 ◽  
Author(s):  
Rahul Dutta ◽  
Jari Turunen ◽  
Goëry Genty ◽  
Ari T. Friberg
Keyword(s):  
Temporal Coherence ◽  
Pulse Trains

Partial spectral and temporal coherence of plane-wave pulse trains in second-harmonic generation

2021 ◽  
Author(s):  
Henri Atte Pesonen ◽  
Juha-Matti Huusko ◽  
Xiaorun Zang ◽  
Ari T Friberg ◽  
Jari Turunen ◽  
...  
Keyword(s):  
Plane Wave ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Temporal Coherence ◽  
Partial Coherence ◽  
Sh Wave ◽  
Wave Pulse ◽  
Pulse Trains ◽  
Degree Of Coherence

Abstract We study the spectral and temporal coherence effects in the passage of a Gaussian Schell-model (GSM) scalar, plane-wave pulse train through a slab of nonlinear optical crystal exhibiting second-harmonic generation. We show that due to the nonlinear interaction the temporal and spectral degrees of coherence of the fundamental (F) and second-harmonic (SH) pulse trains at the exit facet may deviate markedly from the GSM and the global degree of coherence of the SH wave generally decreases with increasing incident F beam intensity. In addition, we find that due to the partial coherence of the incident GSM field the transmitted SH wave may show a double-peaked intensity distribution.

Principle and practice of high-resolution imaging with a field-emission TEM

1992 ◽  
Vol 50 (1) ◽  
pp. 138-139
Author(s):  
Max T. Otten ◽  
Wim M.J. Coene
Keyword(s):  
High Resolution ◽  
Field Emission ◽  
Incidence Angle ◽  
Temporal Coherence ◽  
Energy Spread ◽  
High Resolution Imaging ◽  
Major Improvement ◽  
High Resolution Images ◽  
Resolution Imaging

High-resolution imaging with a LaB6 instrument is limited by the spatial and temporal coherence, with little contrast remaining beyond the point resolution. A Field Emission Gun (FEG) reduces the incidence angle by a factor 5 to 10 and the energy spread by 2 to 3. Since the incidence angle is the dominant limitation for LaB6 the FEG provides a major improvement in contrast transfer, reducing the information limit to roughly one half of the point resolution. The strong improvement, predicted from high-resolution theory, can be seen readily in diffractograms (Fig. 1) and high-resolution images (Fig. 2). Even if the information in the image is limited deliberately to the point resolution by using an objective aperture, the improved contrast transfer close to the point resolution (Fig. 1) is already worthwhile.

Time

2018 ◽  
Author(s):  
Bruno and
Keyword(s):  
Temporal Coherence ◽  
The Other ◽  
Sensory Receptors ◽  
Traditional Notion ◽  
Physical Energy ◽  
Multisensory Interactions ◽  
The Senses ◽  
Perception Of Time ◽  
Temporal Extent ◽  
Stimulus Time

Within the traditional notion of the senses, the perception of time is especially puzzling. There is no specific physical energy carrying information about time, and hence no sensory receptors can transduce a ‘temporal stimulus.’ Time-related properties of events can instead be shown to emerge from specific perceptual processes involving multisensory interactions. In this chapter, we will examine five such properties: the awareness that two events occur at the same time (simultaneity) or one after the other (succession); the coherent time-stamping of events despite inaccuracies and imprecisions in coding simultaneity and succession (temporal coherence); the awareness of the temporal extent occupied by events (duration); the organization of events in regular temporal units (rhythm).

scholarly journals Attosecond intra-valence band dynamics and resonant-photoemission delays in W(110)

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
S. Heinrich ◽  
T. Saule ◽  
M. Högner ◽  
Y. Cui ◽  
V. S. Yakovlev ◽  
...  
Keyword(s):  
Valence Band ◽  
Photoelectron Spectroscopy ◽  
Electronic Band Structure ◽  
Photoelectric Effect ◽  
Final State ◽  
Electronic Band ◽  
Time Resolved ◽  
Resonant Photoemission ◽  
Pulse Trains ◽  
Electron Correlation Effects

AbstractTime-resolved photoelectron spectroscopy with attosecond precision provides new insights into the photoelectric effect and gives information about the timing of photoemission from different electronic states within the electronic band structure of solids. Electron transport, scattering phenomena and electron-electron correlation effects can be observed on attosecond time scales by timing photoemission from valence band states against that from core states. However, accessing intraband effects was so far particularly challenging due to the simultaneous requirements on energy, momentum and time resolution. Here we report on an experiment utilizing intracavity generated attosecond pulse trains to meet these demands at high flux and high photon energies to measure intraband delays between sp- and d-band states in the valence band photoemission from tungsten and investigate final-state effects in resonant photoemission.

Sign in / Sign up

Export Citation Format

Share Document