Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Chinese Physics Letters

Recovery of the intensity envelope of an ultrashort laser pulse from experimental correlation data

Zhu Zhenhe

Published Mar 1, 1987• 0 citations
Publisher

Abstract

It is shown that the time-dependent intensity of an ultrashort laser pulse can be recovered from the second-order correlation G (2) (τ) and the third-order correlation with single time-delay G (3) (τ). The recovery is successfully carried out by a computer with ingenious programming.
DOI
10.1088/0256-307x/4/3/005

Related papers

Picosecond resolution in amplitude cross-correlation experiments with nanosecond sources

A. Bouchene, Anne Débarre, J. Keller +2 more

Although ultrashort laser pulses are usually needed for the optical exploration of ultrafast relaxation processes, it is known that the same time resolution can be attained with long duration pulses, provided their coherence time τc is shorter than the investigated process characteristic time. A time delayed four-wave mixing configuration is then used.

•May 21, 1990•0 citations

Determination of the third-order correlation function by noncollinear two-beam third-harmonic generation

Grigorii G Grigoryan, A. O. Melikyan, David G. Sarkisyan +1 more

A method was developed for determination of the third-order correlation function G (3) (0, τ) on the basis of noncollinear two-beam generation of the third harmonic in a cell containing an atomic metal vapour. The advantages of the proposed method are its simplicity, validity in a wide range of wavelengths, and ability to reveal the asymmetry of an ultrashort pulse in one laser shot. A criterion of the reproducibility of the laser output pulses from one shot to the next was established. In the case of smooth laser pulses it is possible to select a convenient analytic model for the function G (3) (0, τ). The capabilities of the method are demonstrated by the application to a picosecond YAIO 3 : Nd 3+ laser.

Quantum Electronics•Mar 31, 1995•2 citations

Intrinsic third-order correlations in laser light near threshold

Mario Corti, Vittorio Degiorgio

We present an experimental investigation of the third-order intensity correlations in the light from a single-mode intensity-stabilized He-Ne laser in the threshold region. Accurate results were obtained by utilizing a fast digital correlator operating in real time. The computation of the intrinsic third-order correlations requires also a knowledge of the second-order intensity correlation which was measured under the same operating conditions. The experimental data are in agreement with recent theoretical computations based on the usual Van der Pol model of the laser oscillator. A new definition of the intrinsic correlations, which seems more appropriate for the interpretation of the experimental results, is discussed.

Physical Review A•Oct 1, 1976•17 citations

Non-linear excitation of atoms by ultrashort electromagnetic pulses

Valery Alexandrovich Astapenko, Sergey V. Sakhno

The development of methods of generation of ultrashort pulses (USP) of femto- and attosecond duration ranges with controlled parameters necessitates the theoretical study of features of their interaction with a matter [1]. Among such features that do not exist in case of “long” pulses should first of all be the nonlinear dependence of the photoprocess probability W on the USP duration (τ) [2] as well as the dependence on the carrier phase with respect to the pulse envelope (φ) [3-4]. It should be noted that if the dependence of the probability W on the phase φ manifests itself either only for very short pulses, when ωτ < 1 (ω is carrier frequency of the pulse), or in case of a nonlinear photoprocess [3], the function W(τ) can differ from a linear function in the limit ωτ> 1 too for fields of moderate strength, when the perturbation theory is applicable [2].

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•Apr 27, 2016•0 citations

Intensity Interference of Ultrashort Pulsed Fluorescence

Motoyoshi Baba, Ying Li, Masahiro Matsuoka

We extend the intensity interference experiments to a pulse envelope measurement of ultrashort incoherent optical pulses. The interfering fields can be mutually incoherent light pulses from independent sources. We show that the pulse envelope or width of ultrashort incoherent light pulses can be measured independently from the coherence time by using a combination of interferometer and two-photon coincidence counter. With this method we have measured the envelope autocorrelation of mutually incoherent femtosecond fluorescence from a solution of Nile Blue in dimethylaniline.

Physical Review Letters•Jun 17, 1996•9 citations

Second-order photon correlation measurement with picosecond resolution using frequency upconversion

Aymeric Delteil, Chun Tat Ngai, Thomas Fink +1 more

The second-order correlation function of light g(2)(τ) constitutes a pivotal tool to quantify the quantum behavior of an emitter and in turn its potential for quantum information applications. The experimentally accessible time resolution of g(2)(τ) is usually limited by the jitter of available single-photon detectors. Here, we present a versatile technique allowing g(2)(τ) to be measured from a large variety of light signals with a time resolution given by the pulse length of a mode-locked laser. The technique is based on frequency upconversion in a nonlinear waveguide, and we analyze its properties and limitations by modeling the pulse propagation and the frequency conversion process. We measure g(2)(τ) from various signals including light from a quantum emitter—a confined exciton-polariton structure—revealing its quantum signatures at a scale of a few picoseconds and demonstrating the capability of the technique.

arXiv:1904.02515•Optics Letters•Jul 30, 2019•7 citations
A method was developed for determination of the third-order correlation function G (3) (0, τ) on the basis of noncollinear two-beam generation of the third harmonic in a cell containing an atomic metal vapour. The advantages of the proposed method are its simplicity, validity in a wide range of wavelengths, and ability to reveal the asymmetry of an ultrashort pulse in one laser shot. A criterion of the reproducibility of the laser output pulses from one shot to the next was established. In the case of smooth laser pulses it is possible to select a convenient analytic model for the function G (3) (0, τ). The capabilities of the method are demonstrated by the application to a picosecond YAIO 3 : Nd 3+ laser.
We present an experimental investigation of the third-order intensity correlations in the light from a single-mode intensity-stabilized He-Ne laser in the threshold region. Accurate results were obtained by utilizing a fast digital correlator operating in real time. The computation of the intrinsic third-order correlations requires also a knowledge of the second-order intensity correlation which was measured under the same operating conditions. The experimental data are in agreement with recent theoretical computations based on the usual Van der Pol model of the laser oscillator. A new definition of the intrinsic correlations, which seems more appropriate for the interpretation of the experimental results, is discussed.
The development of methods of generation of ultrashort pulses (USP) of femto- and attosecond duration ranges with controlled parameters necessitates the theoretical study of features of their interaction with a matter [1]. Among such features that do not exist in case of “long” pulses should first of all be the nonlinear dependence of the photoprocess probability W on the USP duration (τ) [2] as well as the dependence on the carrier phase with respect to the pulse envelope (φ) [3-4]. It should be noted that if the dependence of the probability W on the phase φ manifests itself either only for very short pulses, when ωτ < 1 (ω is carrier frequency of the pulse), or in case of a nonlinear photoprocess [3], the function W(τ) can differ from a linear function in the limit ωτ> 1 too for fields of moderate strength, when the perturbation theory is applicable [2].
We extend the intensity interference experiments to a pulse envelope measurement of ultrashort incoherent optical pulses. The interfering fields can be mutually incoherent light pulses from independent sources. We show that the pulse envelope or width of ultrashort incoherent light pulses can be measured independently from the coherence time by using a combination of interferometer and two-photon coincidence counter. With this method we have measured the envelope autocorrelation of mutually incoherent femtosecond fluorescence from a solution of Nile Blue in dimethylaniline.
The second-order correlation function of light g(2)(τ) constitutes a pivotal tool to quantify the quantum behavior of an emitter and in turn its potential for quantum information applications. The experimentally accessible time resolution of g(2)(τ) is usually limited by the jitter of available single-photon detectors. Here, we present a versatile technique allowing g(2)(τ) to be measured from a large variety of light signals with a time resolution given by the pulse length of a mode-locked laser. The technique is based on frequency upconversion in a nonlinear waveguide, and we analyze its properties and limitations by modeling the pulse propagation and the frequency conversion process. We measure g(2)(τ) from various signals including light from a quantum emitter—a confined exciton-polariton structure—revealing its quantum signatures at a scale of a few picoseconds and demonstrating the capability of the technique.