The results of an experimental investigation the incoherent photon echo in ruby (with Cr 3+ concentration equal to 0.16 wt%) at T =1.7 K are presented. Optical fiber with length 3 m and diameter 100 μm was used for delivery first exciting pulse a sample. dependence IPE intensity on excitation wavelength within width R 1 absorption line studied. decay curve obtained phase relaxation time found be 98 ns.

A new scheme of the definition g-factors as ground and excited optical states a paramagnetic ion in zero external constant magnetic field has been proposed experimentally realized systems which Zeeman effect is manifested. pulse weak leads to occurrence relative phase shifts dipoles and, consequence, modulation photon echo wave form if overlaps time with pulse. The periods depend on polarization laser light excites echo. values these for σ - π-laser have measured then 4I15/2 4F9/2 Er3+...

A novel scheme for determining the pseudo-Stark splitting of optical lines has been suggested and tested in experiment. The allows one to observe beating a photon echo waveform under conditions overlap time between weak electric pulse its echo- pulse. is equal inverse average modulation period waveform. R1-line Ruby observed. dependence on value field over optically excited volume found. obtained values parameter are good agreement with known literature data.

It is reported about the first observation and studying of photon echo in LuLiF 4 :Er 3+ . The energy transition I 15/2 → F 9/2 (λ=6536 Å). density ErF 3 0.025 wt%. operation temperature 1.9 K. Measurements were spent at low (up to 1200 Oe) even zero external magnetic fields. was studied a behavior intensity versus field magnitude direction crystal axis C laser pulse separation t 12 observed an exponential growth then, after some plateau, decreasing as function with increasing from value....

The signals of photon echo (PE) are investigated firstly in a ruby crystal doped only by the 53Cr isotope ions concentration 0.03 – 0,05 wt%. optical experiments were performed backward regime at wavelength 693.4 nm both with low magnetic field (200 G) and without it. Since have hyperfine structure levels special attention was paid to study stimulated primarily investigation its decay kinetics. It is established that this has form which typical long-lived PE. But contrast PE time our case...

We report the first observation and study of photon echo in Er3+:LuLiF4. The energy transition is 4 I 15/2 → F 9/2 (λ = 6536 Å). density ErF3 0.025 wt %. operation temperature 1.9 K. Measurements were made at low (up to 1200 Oe) even zero external magnetic fields. studied behavior intensity vs. field magnitude direction about crystal axis C laser pulse separation t 12 observed an exponential growth then, after a certain plateau, decrease as function upon increasing from zero. parameters...

The coefficient of a linear Stark shift the 4 F 9/2 -4 I 15/2 transition Er 3+ ion in Y 2 SiO 5 is measured (14.3 kHzV -1 cm ) by splitting upper and lower levels pulsed electric field measuring frequency from period beatings temporal form photon echo signal (stark beating method).The coefficients transitions have not been before, this valuable result for number applications such as gradient memory, group velocity control via spectral hole burning, etc.

Optical superradiance was experimentally obtained for the first time on 3P0—3H4(0) transition in a Van Vleck paramagnet — Pr3+:LaF3 crystal. Superradiance at wavelength of 477.7 nm emitted by sample 8 mm long, with resonant absorption coefficient α=4.7 cm-1, excited 10-ns laser pulses temperature 2.2 K.

A relative phase shift between the different groups of excited dipoles, which appears as result its frequency splitting due to action a pulse electric or magnetic fields, depends on time, if overlaps in time with echo-pulse. As а consequence, echo waveform is changed. The form modulated. inverse modulation period well enough approximates Zeeman and pseudo-Stark cases and, therefore, electrical fields. Thus g-factors ground 4I15/2 4F9/2 optical states Er3+ ion LuLiF4 YLiF4 have been measured...

We have measured the magnetic parameters of a paramagnetic ion in ground and excited states by controlling relative phases dipoles with pulse weak field. Er3+ two crystals LuLiF4 YLiF4 has been used as ion. The second matrix was for control. Optical transition is 4I15/2 → 4F9/2.

Two-pulse photon echo in LiLuF₄:Er³⁺ crystal subjected to a weak pulsed magnetic field is investigated. The dependence of the intensity on switching time analyzed. Prospects for using modulation by photon-echo-based storage are discussed.

This paper is about the possibilities of optically dense impurity media spectroscopy by means incoherent photon echo. The theoretical model phenomenon given. results experiment on echo in a crystal ruby at liquid helium temperature are presented. Fiber optical delay line was used to make an incoherence excitation radiation. dependence intensity wavelength studied. decay curve obtained and phase relaxation time found be equal 98 ns.

Temporal shape of a primary photon echo (PPE) in ruby is experimentally investigated. Using special equipment, including dye laser and stroboscopic oscilloscope, allows to observe the "beats" temporal echo. Analysis shows that these are due hyperfine interaction electrons "Cr-53" isotope ions with their nuclei.