Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE

The features of coherent stimulated emission of Pr3+doped into LaF 3 matrix

G. G. Grigoryan, Yu. V. Orlov, Evgenii A Petrenko, A. Yu. Shashkov, Nikolay V Znamenskiy

Published Mar 23, 2005• 0 citations
Publisher

Abstract

The paper presents the experimental results on temporal characteristics of coherent stimulated emission on the 3PO-3H6 transition of Pr3+ doped into the LaF3 matrix while turning the pumping frequency in the vicinity of 3H4-3PO transition. The stimulated emission was generated in the modes both with and without an external resonator. It was found that the emission duration could be up to 2 μs and consisted of train of spikes. Simultaneously the fluorescence emission was observed on the 3PO-3H4, 3H5j, 3H6, 3F2 transitions Pr3+, which also had a complicated temporal form.

DOI
10.1117/12.611217

Related papers

Temporal evolution of coherent stimulated emission in the three-level system LaF 3 :Pr 3+

A. I. Agafonov, G. G. Grigoryan, Eduard A. Manykin +4 more

The paper reports the experimental results on the temporal characteristics of coherent stimulated emission on the 3P0-3H6 transition of Pr3+ ion dopped into the LaF3 matrix while tuning of pumping frequency in the vicinity of the 3H4-3P0 transition. The generation pulse duration was found to be about 10 ns, and it was delayed by 3-4 ns relative to the beginning of the pumping pulse at the exact resonance. It was observed that as the detuning increased, the shape of the coherent stimulated emission pulse changed and its delay increased up to 10ns. A theoretical interpretation of the experimental results observed is proposed.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•Apr 7, 2004•0 citations

Temporal evolution of a coherent stimulated radiation pulse in the three-level system in a Pr3+: LaF3crystal

A. I. Agafonov, Grigorii G Grigoryan, Nikolay V Znamenskiy +4 more

The temporal characteristics of coherent stimulated radiation at the 3 P 0 — 3 H 6 transition in the Pr 3+ ion in a LaF 3 matrix are studied by tuning the pump frequency in the vicinity of the 3 H 4 — 3 P 0 transition. It is found that in the case of the exact tuning to the resonance, a laser pulse, consisting of a train of picosecond spikes of total duration about 10 ns, was delayed by 3–4 ns with respect to the pump pulse onset. As the pump pulse detuning was increased, the shape of the coherent laser pulse changes and its delay increased up to 10 ns. The experimental results are interpreted theoretically.

Quantum Electronics•Sep 30, 2004•10 citations

Peculiarities of two-color optical superradiance in the LaF 3 :Pr 3+ crystal

Alexei A. Kalachev, Самарцев Виталий Владимирович

We report the results of detailed investigation of optical superradiance (SR) in LaF3:Pr3+ crystal resonantly excited on the 3P0-3H4(0) transition by laser pulse. When the power of the pumping pulse was higher than a certain threshold, the resonant medium emitted by optical SR pulse on 3P0-3H4(0) transition in the direction of the pumping pulse (as well as in the opposite direction) delayed in time with respect to the pumping pulse. Further increasing of the peak power of the pumping pulse led to the observation of SR on the 3P0-3H6(1) transition also. Thus, the two-color SR in the employed crystal was observed.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•Apr 20, 2004•0 citations

Superradiant emission of LaF3:Pr3+ in resonator

G. G. Grigoryan, Yu. V. Orlov, A. Yu. Shashkov +2 more

Experimental data concerning superradiant emission from the LaF 3 medium doped with impurity praseodymium ions are presented in the cases of a free medium and when the medium is placed into an optical resonator. The spike structure of superradiance is registered and studied. When the medium is placed inside a cavity, a new channel of energy removal by superradiance related to the cavity mode appears; the old noncavity channels are preserved. The duration of superradiance in the cavity channel is decreased, and regular modulation arises. These peculiarities of superradiance induced by the presence of an optical resonator are explained.

Laser Physics•Apr 1, 2007•5 citations

Spectroscopy, relaxation, and laser action in Pr3+:LaF3

R. Kichinski, Fred Moshary, Sven R. Hartmann

The photon echo technique was used to investigate the 3P0‐3H6 (5985Å) and the two 3P0‐3H5 (5333.0 Å 5333.5 Å) transitions in Pr3+:LaF3 at 4.6 K. On the 3P0‐3H6 transition, the data displayed modulation and spanned a dynamic range of nine decades in intensity. Echo relaxation rates were anomalously fast in view of previous experiments in this sample. We also report observation of ‘Satellite Echoes’ on the satellite lines of the 3P0‐3H4(4778 Å) transition and present photon echo data obtained on one of the satellite lines. Lasing was observed at 4.6 K and at 77 K during pulse excitation of the 3P0‐3H4 and 3P1(2I6)‐3H4(4633 Å) transitions.

AIP conference proceedings•Jan 1, 1986•4 citations

Optical superradiance in Van-Vleck paramagnets

Alexei A. Kalachev, В. А. Зуйков, Самарцев Виталий Владимирович +1 more

The paper describes experimental investigations of two-color optical super-radiance (SR) in LaF3:Pr3+ crystal. Optical excitation was made on the transition 3P0- 3H4(0) at liquid helium temperature. When the power of the pumping 10ns-pulse was higher than a certain threshold, the resonant medium emitted an optical SR pulse on 3P0-3H4(0) transition with a duration of 8-10 ns in the direction of the pumping pulse delayed in time by 12-15 ns with respect to the pumping pulse. When the peak power of the pumping pulse increases up to 40 kW, an SR pulse was also observed for the 3P0-3H6(1) transition. The delay time of this pulse was about 30 ns. Thus, the two-color SR in the employed crystal was observed.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•Jul 12, 2002•0 citations
The paper presents the experimental results on temporal characteristics of coherent stimulated emission on the 3PO-3H6 transition of Pr3+ doped into the LaF3 matrix while turning the pumping frequency in the vicinity of 3H4-3PO transition. The stimulated emission was generated in the modes both with and without an external resonator. It was found that the emission duration could be up to 2 μs and consisted of train of spikes. Simultaneously the fluorescence emission was observed on the 3PO-3H4, 3H5j, 3H6, 3F2 transitions Pr3+, which also had a complicated temporal form.
The paper reports the experimental results on the temporal characteristics of coherent stimulated emission on the 3P0-3H6 transition of Pr3+ ion dopped into the LaF3 matrix while tuning of pumping frequency in the vicinity of the 3H4-3P0 transition. The generation pulse duration was found to be about 10 ns, and it was delayed by 3-4 ns relative to the beginning of the pumping pulse at the exact resonance. It was observed that as the detuning increased, the shape of the coherent stimulated emission pulse changed and its delay increased up to 10ns. A theoretical interpretation of the experimental results observed is proposed.
The temporal characteristics of coherent stimulated radiation at the 3 P 0 — 3 H 6 transition in the Pr 3+ ion in a LaF 3 matrix are studied by tuning the pump frequency in the vicinity of the 3 H 4 — 3 P 0 transition. It is found that in the case of the exact tuning to the resonance, a laser pulse, consisting of a train of picosecond spikes of total duration about 10 ns, was delayed by 3–4 ns with respect to the pump pulse onset. As the pump pulse detuning was increased, the shape of the coherent laser pulse changes and its delay increased up to 10 ns. The experimental results are interpreted theoretically.
We report the results of detailed investigation of optical superradiance (SR) in LaF3:Pr3+ crystal resonantly excited on the 3P0-3H4(0) transition by laser pulse. When the power of the pumping pulse was higher than a certain threshold, the resonant medium emitted by optical SR pulse on 3P0-3H4(0) transition in the direction of the pumping pulse (as well as in the opposite direction) delayed in time with respect to the pumping pulse. Further increasing of the peak power of the pumping pulse led to the observation of SR on the 3P0-3H6(1) transition also. Thus, the two-color SR in the employed crystal was observed.
Experimental data concerning superradiant emission from the LaF 3 medium doped with impurity praseodymium ions are presented in the cases of a free medium and when the medium is placed into an optical resonator. The spike structure of superradiance is registered and studied. When the medium is placed inside a cavity, a new channel of energy removal by superradiance related to the cavity mode appears; the old noncavity channels are preserved. The duration of superradiance in the cavity channel is decreased, and regular modulation arises. These peculiarities of superradiance induced by the presence of an optical resonator are explained.
The photon echo technique was used to investigate the 3P0‐3H6 (5985Å) and the two 3P0‐3H5 (5333.0 Å 5333.5 Å) transitions in Pr3+:LaF3 at 4.6 K. On the 3P0‐3H6 transition, the data displayed modulation and spanned a dynamic range of nine decades in intensity. Echo relaxation rates were anomalously fast in view of previous experiments in this sample. We also report observation of ‘Satellite Echoes’ on the satellite lines of the 3P0‐3H4(4778 Å) transition and present photon echo data obtained on one of the satellite lines. Lasing was observed at 4.6 K and at 77 K during pulse excitation of the 3P0‐3H4 and 3P1(2I6)‐3H4(4633 Å) transitions.
The paper describes experimental investigations of two-color optical super-radiance (SR) in LaF3:Pr3+ crystal. Optical excitation was made on the transition 3P0- 3H4(0) at liquid helium temperature. When the power of the pumping 10ns-pulse was higher than a certain threshold, the resonant medium emitted an optical SR pulse on 3P0-3H4(0) transition with a duration of 8-10 ns in the direction of the pumping pulse delayed in time by 12-15 ns with respect to the pumping pulse. When the peak power of the pumping pulse increases up to 40 kW, an SR pulse was also observed for the 3P0-3H6(1) transition. The delay time of this pulse was about 30 ns. Thus, the two-color SR in the employed crystal was observed.