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

Journal of the Optical Society of America B

Photon echoes induced by a phase-diffusing field: experimental evidence of a reversible behavior

François Rohart

Published Apr 1, 1986• 7 citations
Publisher

Abstract

We report quantitative measurements of the effects of a phase-diffusing field on coherent transients when the detected signals are averaged over many shots. Experiments were made at a millimeter wavelength, and frequency fluctuations were simulated by deliberately applying a well-defined random Stark field to the gaseous sample: This permits a separate adjustment of the amplitude and the rate of fluctuations. In the case of slow frequency fluctuations, two- and three-pulse-induced photon echoes clearly exhibit a reversible behavior that is closely related to the definite shape of the frequency-autocorrelation function.

DOI
10.1364/josab.3.000622

Related papers

Phase-matching memory effect in optical coherent transient effects

José Soto M.

It has been generally accepted that the off-resonance heterodyne optical field in Stark-switching and frequency-switching techniques does not have any measurable influence in photon-echo and other related experiments. I present theoretical and experimental evidence that, through the generation of a delayed phase mismatch between the excitation and emitted radiation, the heterodyne field produces important undulations in the decay curves of a photon echo.

Journal of the Optical Society of America B•Nov 1, 1989•0 citations

Phase matching memory effect in optical coherent transient effects

José Soto M.

It has been generally accepted that the off-resonance heterodyne optical field in Stark-switching and frequency-switching techniques does not have any measurable influence in photon echo and other related experiments. In this work we present theoretical and experimental evidence that through a previously unknown memory effect the heterodyne field produces important undulations in the decay curves of photon echo. This effect appears to be also responsible for other experimental anomalies observed in optical coherent transient effects.1

Annual Meeting Optical Society of America•Jan 1, 1989•0 citations

MODULATION OF COHERENT TRANSIENT EFFECTS BY HETERODYNE FIELDS IN STARK AND FREQUENCY SWITCHING.

Jose. Soto-Manriquez

Coherent transient effects are the optical analogs of the many transient phenomena seen in pulsed nuclear magnetic resonance experiments on spin systems. For example, photon-echo and optical nutation are the respective optical equivalents of spin echo and transient nutation of nuclear magnetic resonance. In Stark-switching and frequency-switching techniques the laser field and the molecules are brought into resonance in a sequence of pulses, the rest of the time they remain well off-resonance. So far it has been assumed that the off-resonance field does not have any measureable influence on the experimental results and is utilized to implement a very efficient detection scheme. This work discusses how the off-resonance field affects the coherent transient effects. It is shown here how this field, by inducing changes in the index of refraction as small as 10⁻⁶ produces easily observable effects in photon echo and delayed optical nutation.

•Jan 1, 1983•0 citations

cw photon echo

Masaharu Mitsunaga, Ravinder Kachru, E. Y. Xu +1 more

We apply for the first time a novel coherent transient, the cw photon echo. The propagation direction of the optical coherence prepared in a medium by a broadband cw laser beam is reversed by a pair of counterpropagating laser pulses, resulting in a continuous emission of the signal. The signal decays with a phase relaxation time ${\mathrm{T}}_{2}$ and can have a quantum-beat-type modulation, giving the same wave form in one single shot as the plot of echo intensity versus pulse separation in a standard two-pulse echo experiment. Experimental demonstration is given in a ${\mathrm{Eu}}^{3+}$:${\mathrm{YAlO}}_{3}$ crystal.

Physical Review Letters•Aug 14, 1989•9 citations

Statistical Modeling and Theoretical Analysis of the Influence of Laser Phase Fluctuations on Photon Echo Data Erasure and Stimulated Photon Echoes

Ulf Elman, Stefan Kröll

The effect of random laser phase fluctuations on stimulated photon echoes (SPEs) and on coherently added SPEs was studied and evaluated both experimentally and analytically with statistical methods. The general concept of describing laser frequency fluctuations as a stationary stochastic process is presented and applied to three specific SPE configurations. The effect of phase fluctuations on erasing an SPE by coherently adding another SPE, phase-shifted by 180 degrees relative to the first, is presented.

Laser Physics•Jan 1, 1996•6 citations

Effects of hidden transient noise processes on multiphoton absorption

K. Wódkiewicz, Joseph H. Eberly

We consider a category of transient processes that is usually hidden from view in coherent-transient experiments. These are the very fast noise processes that give rise to relaxation effects. We present different Markov-type models of a class of these noise processes, namely, laser phase and frequency fluctuations. These models lead to different forms for the laser-field autocorrelation function, depending on which quantity, the phase or the frequency, is the primary source of noise. We show that it is possible to establish a regime such that all these kinds of noise will lead to a Lorentzian laser power spectrum. Despite this common feature, N-photon absorption exhibits observable differences depending on the source of fluctuations. For example, for diffusive noises the absorption linewidth increases as N2, but for jumplike or shotlike phase fluctuations it can be N independent.

Journal of the Optical Society of America B•Apr 1, 1986•16 citations
We report quantitative measurements of the effects of a phase-diffusing field on coherent transients when the detected signals are averaged over many shots. Experiments were made at a millimeter wavelength, and frequency fluctuations were simulated by deliberately applying a well-defined random Stark field to the gaseous sample: This permits a separate adjustment of the amplitude and the rate of fluctuations. In the case of slow frequency fluctuations, two- and three-pulse-induced photon echoes clearly exhibit a reversible behavior that is closely related to the definite shape of the frequency-autocorrelation function.
It has been generally accepted that the off-resonance heterodyne optical field in Stark-switching and frequency-switching techniques does not have any measurable influence in photon echo and other related experiments. In this work we present theoretical and experimental evidence that through a previously unknown memory effect the heterodyne field produces important undulations in the decay curves of photon echo. This effect appears to be also responsible for other experimental anomalies observed in optical coherent transient effects.1
Coherent transient effects are the optical analogs of the many transient phenomena seen in pulsed nuclear magnetic resonance experiments on spin systems. For example, photon-echo and optical nutation are the respective optical equivalents of spin echo and transient nutation of nuclear magnetic resonance. In Stark-switching and frequency-switching techniques the laser field and the molecules are brought into resonance in a sequence of pulses, the rest of the time they remain well off-resonance. So far it has been assumed that the off-resonance field does not have any measureable influence on the experimental results and is utilized to implement a very efficient detection scheme. This work discusses how the off-resonance field affects the coherent transient effects. It is shown here how this field, by inducing changes in the index of refraction as small as 10⁻⁶ produces easily observable effects in photon echo and delayed optical nutation.
We apply for the first time a novel coherent transient, the cw photon echo. The propagation direction of the optical coherence prepared in a medium by a broadband cw laser beam is reversed by a pair of counterpropagating laser pulses, resulting in a continuous emission of the signal. The signal decays with a phase relaxation time T2{\mathrm{T}}_{2}T2​ and can have a quantum-beat-type modulation, giving the same wave form in one single shot as the plot of echo intensity versus pulse separation in a standard two-pulse echo experiment. Experimental demonstration is given in a Eu3+{\mathrm{Eu}}^{3+}Eu3+:YAlO3{\mathrm{YAlO}}_{3}YAlO3​ crystal.
The effect of random laser phase fluctuations on stimulated photon echoes (SPEs) and on coherently added SPEs was studied and evaluated both experimentally and analytically with statistical methods. The general concept of describing laser frequency fluctuations as a stationary stochastic process is presented and applied to three specific SPE configurations. The effect of phase fluctuations on erasing an SPE by coherently adding another SPE, phase-shifted by 180 degrees relative to the first, is presented.
We consider a category of transient processes that is usually hidden from view in coherent-transient experiments. These are the very fast noise processes that give rise to relaxation effects. We present different Markov-type models of a class of these noise processes, namely, laser phase and frequency fluctuations. These models lead to different forms for the laser-field autocorrelation function, depending on which quantity, the phase or the frequency, is the primary source of noise. We show that it is possible to establish a regime such that all these kinds of noise will lead to a Lorentzian laser power spectrum. Despite this common feature, N-photon absorption exhibits observable differences depending on the source of fluctuations. For example, for diffusive noises the absorption linewidth increases as N2, but for jumplike or shotlike phase fluctuations it can be N independent.