Stimulated Photon Echo Response Research Articles

Differentiation of the Contribution of Velocity-Changing Gas-Particle Collisions to Attenuation of the Stimulated Photon Echo Response

The effect of velocity-changing gas-particle collisions on the intensity of the stimulated photon echo response is investigated. The intensity is influenced most by such collisions if the exciting-pulse wave vectors are nonparallel. An approximation of the intensity of the stimulated photon echo response as a function of the time interval between the second and third exciting laser pulses is proposed and enables differentiation of the contribution of velocity-changing particle collisions to attenuation of the response. The results are of interest for optical coherent echo spectroscopy.

Two-frequency information recording in a three-level system using stimulated photon echo

The process of recording and reproducing information in a three-level system using stimulated photon echo is studied as a function of the amount of information embedded in the first and second two-frequency object laser pulses. It is shown that two-frequency information recording leads to an increase in the power of the stimulated photon echo response on one frequency transition and to its reduction on the other.

Two-Frequency Information Recording Using Stimulated Photon Echo in a Three-Level System

We study recording of information in a three-level system at external spatially inhomogeneous electric fields in the case of its coding in the first two-frequency object laser pulse. At two-frequency information recording, the temporal shape of a two-frequency object pulse is correlated with stimulated photonecho response. We observe that stimulated photon-echo responses are observed to be locked during the action of an external spatially inhomogeneous electric field between the first and second or after the third two-frequency pulse.

Information reproducibility in a stimulated photon-echo response at different orientations of external spatially inhomogeneous electric fields

We have studied the locking effect of photon-echo responses in a three-level system and the information reproducibility upon coding the information in the temporal shape of the object laser pulse. We have shown that these effects differ from their analogs in the two-level system.

The optimal conditions for the correlation of object pulse temporary form with the stimulated photon echo response in the presence of external spatial inhomogeneous electric fields

The influence of external spatially inhomogeneous electric fields on the reproducibility of the information and effectiveness of stimulated photon echo responses locking at different encoding information in the object laser pulses are investigated.

Change in Information Flow Density in Optical Echo Processors

We consider the change in information flow density in the stimulated photon-echo response in a threelevel system as a function of the spectrum nonequidistance parameter.

Effectiveness of Locking a Stimulated Photon Echo in a Three-Level System, Depending on the Mutual Orientation of Standing Waves of Nonresonant Laser Pulses

We consider the effectiveness of locking the stimulated photon echo response in a three-level system, depending on the mutual orientation of external nonresonant electromagnetic standing waves. We show that the effect of locking the stimulated photon echo response depends on the “non-equidistance” parameter for the spectrum of the system.

Control of Stimulated Photon-Echo Response Time in a Three-Level System by Changing the Relative Orientation of the External Electric-Field Gradients

We investigate the formation of stimulated photon echo in a three-level system in the presence of spatially inhomogeneous external electric fields. We show the possibility of controlling stimulated photon-echo response time in the nano-temporal range.

Two-Channel Hologram Recording Using Photon Echo in Three-Level Systems

Information recording in three-level systems in external spatially inhomogeneous electric fields with coding of the data in the first two-frequency object pulse is studied. It is shown that when the nonequidistance parameter of the system is <1 the real-time scale in the stimulated photon echo response undergoes changes. When a spatially inhomogeneous electric field is applied between the first and second pulses and after the third pulse, a locking effect is observed in the stimulated photon echo response with an efficiency that depends on the field gradient.

Optimum conditions for correlation of the temporal shape of an object pulse with a stimulated photon echo response in inhomogeneous external electric fields

We have studied the information locking effect and the effect of correlation of the shape of an object laser pulse with the shape of a stimulated photon echo response in the presence of external spatially inhomogeneous electric fields. We have shown that, for the transition 3H4-3P0 in a LaF3:Pr3+ crystal, one can observe the effect of the correlation of the shape of an object laser pulse with the shape of a stimulated photon echo response and, depending on the scheme of the action of external spatially inhomogeneous electric fields, either the information locking effect or the information destroying effect.

Determination of Optimum Conditions for Reproducing Information in Optical Echo Processors

We consider correlations between the temporal profile of stimulated photon echo and the temporal form of the object laser pulse. We find that the information measure is a good criterion in choosing optimum conditions for reproducing information in optical echo processors. We show that the reproducibility of information in the stimulated photon-echo response in this regime depends on the object-pulse area.

Calculation of the stimulated photon echo in three-level and degenerate systems in the presence of external inhomogeneous electric fields

We consider the frequency-time correlation of inhomogeneous broadening and its effect on the intensity of the stimulated photon echo response in three-level and degenerate systems, in the presence of external inhomogeneous electric fields. We show that the frequency-time correlation coefficient for frequency shifts in different time intervals and the intensity of the stimulated photon echo response depend on the magnitude of the Stark constants for different resonant transitions and on the external inhomogeneous electric field gradients. We study the possibility of controlling the appearance time of the stimulated photon echo response in the nanosecond range.