FIGURE 4. Measurements of double and triple read-out of the atomic memory.
From the following article:
Observation of coherent optical information storage in an atomic medium using halted light pulses
Chien Liu, Zachary Dutton, Cyrus H. Behroozi and Lene Vestergaard Hau
Nature 409, 490-493(25 January 2001)
doi:10.1038/35054017
To deplete the atomic memory in these cases, we use two (a) and three (b) short coupling pulses. The total energy in the two (three) revived probe pulses is measured to be the same as the energy in the single revived probe pulse obtained with a single, long coupling laser pulse (as used in Figs 2 and 3). Meanings of lines and symbols as in Fig. 2.