The correlation of the
inhomogeneous broadening of the resonance transition at different time
intervals and the efficiency of long-lived photon echo response locking by the
action of standing waves of non-resonant laser pulses are considered. It is shown that the long-lived photon
echo response locking effect may be observed even at the angles of the relative
orientation of the non-resonant standing wave laser pulses of less than one
degree, due to the change in the correlation coefficient of inhomogeneous
broadening at time intervals between the first and the second and after the
third resonant laser pulses.
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