The possibilities of the reverse photon echo for obtaining information about the relaxation times and the electrical dipole momentum of the resonant transition are investigated experimentally in ruby (resonant transition 4A2–2E(Ē)). A new method based on the many-pulse excitation of the resonant system by a single travelling wave and by a sequence of standing waves, is proposed. As a result, this system irradiates a series of reverse echo signals, from the decay of their intensities it is possible to define the relaxation times in a single series. These relaxation times are measured at different values of the permanent magnetic field. The different apparatus solutions of these experimental problems are discussed.The possibilities of the reverse photon echo for obtaining information about the relaxation times and the electrical dipole momentum of the resonant transition are investigated experimentally in ruby (resonant transition 4A2–2E(Ē)). A new method based on the many-pulse excitation of the resonant system by a single travelling wave and by a sequence of standing waves, is proposed. As a result, this system irradiates a series of reverse echo signals, from the decay of their intensities it is possible to define the relaxation times in a single series. These relaxation times are measured at different values of the permanent magnetic field. The different apparatus solutions of these experimental problems are discussed.

physica status solidi (a)Oct 16, 198215 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.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 LettersAug 14, 19899 citations

Properties of the two-pulse photon echo signal

Cheng Li, Xiangyang Yu

Optoelectronics LettersMar 1, 20101 citation

{\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.