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Title: Passive Fe{sup 2+}:ZnSe single-crystal Q switch for 3-{mu}m lasers

Abstract

Passive Q-switching of 3-{mu}m lasers with the help of a Fe{sup 2+}:ZnSe single crystal is demonstrated. The 6-mJ, 50-ns giant pulses are obtained from a 2.9364-{mu}m Er:YAG laser by using this passive Q switch. (letters)

Authors:
 [1]; ; ; ; ;  [2];  [3]
  1. Moscow Institute of Physics and Technology (State University), Dolgoprudnyi, Moscow Region (Russian Federation)
  2. P.N. Lebedev Physics Institute, Russian Academy of Sciences, Moscow (Russian Federation)
  3. Engineering center for new technologies, Institute for Nuclear Research, Russian Academy of Sciences, Troitsk (Russian Federation)
Publication Date:
OSTI Identifier:
21456838
Resource Type:
Journal Article
Resource Relation:
Journal Name: Quantum Electronics (Woodbury, N.Y.); Journal Volume: 36; Journal Issue: 1; Other Information: DOI: 10.1070/QE2006v036n01ABEH013097
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; IRON IONS; MONOCRYSTALS; NEODYMIUM LASERS; PULSES; Q-SWITCHING; ZINC SELENIDES; CHALCOGENIDES; CHARGED PARTICLES; CRYSTALS; IONS; LASERS; SELENIDES; SELENIUM COMPOUNDS; SOLID STATE LASERS; ZINC COMPOUNDS

Citation Formats

Voronov, A A, Kozlovskii, Vladimir I, Korostelin, Yurii V, Landman, Aleksandr I, Podmar'kov, Yu P, Frolov, M P, and Polushkin, V G. Passive Fe{sup 2+}:ZnSe single-crystal Q switch for 3-{mu}m lasers. United States: N. p., 2006. Web. doi:10.1070/QE2006V036N01ABEH013097.
Voronov, A A, Kozlovskii, Vladimir I, Korostelin, Yurii V, Landman, Aleksandr I, Podmar'kov, Yu P, Frolov, M P, & Polushkin, V G. Passive Fe{sup 2+}:ZnSe single-crystal Q switch for 3-{mu}m lasers. United States. doi:10.1070/QE2006V036N01ABEH013097.
Voronov, A A, Kozlovskii, Vladimir I, Korostelin, Yurii V, Landman, Aleksandr I, Podmar'kov, Yu P, Frolov, M P, and Polushkin, V G. Tue . "Passive Fe{sup 2+}:ZnSe single-crystal Q switch for 3-{mu}m lasers". United States. doi:10.1070/QE2006V036N01ABEH013097.
@article{osti_21456838,
title = {Passive Fe{sup 2+}:ZnSe single-crystal Q switch for 3-{mu}m lasers},
author = {Voronov, A A and Kozlovskii, Vladimir I and Korostelin, Yurii V and Landman, Aleksandr I and Podmar'kov, Yu P and Frolov, M P and Polushkin, V G},
abstractNote = {Passive Q-switching of 3-{mu}m lasers with the help of a Fe{sup 2+}:ZnSe single crystal is demonstrated. The 6-mJ, 50-ns giant pulses are obtained from a 2.9364-{mu}m Er:YAG laser by using this passive Q switch. (letters)},
doi = {10.1070/QE2006V036N01ABEH013097},
journal = {Quantum Electronics (Woodbury, N.Y.)},
number = 1,
volume = 36,
place = {United States},
year = {Tue Jan 31 00:00:00 EST 2006},
month = {Tue Jan 31 00:00:00 EST 2006}
}
  • The passive Q-switching of 1.66-{mu}m Er{sup 3+}:YAlO{sub 3} lasers with the help of some saturable absorbers is studied. Giant 200-ns pulses are generated by using a Cr{sup 2+}:ZnSe crystal as a saturable absorber. (control of laser radiation parameters)
  • The nonlinear transmission of light by single-wall carbon nanotube suspensions in D{sub 2}O at a wavelength of 1.54 {mu}m is studied. For the 250-ns probe pulse and the 40-MW cm{sup -2} maximum intensity of radiation incident on a cell, the decrease in the absorption coefficient was 3.6 cm{sup -1} while the absorption coefficient in a weak field was 17 cm{sup -1}. Q-switching and self-mode locking were obtained in a pulsed Er{sup 3+} : glass laser by using a cell with the nanotube suspension as a passive filter. (nonlinear optical phenomena)
  • An investigation was made of the energy characteristics of a YAG:Nd/sup 3 +/ laser subjected to pulse-periodic pumping and to passive Q switching of a resonator by an LiF crystal containing F/sup -//sub 2/ color centers. A comparison was made of the energy of giant laser pulses obtained using passive and electrooptic switches when the pump pulse repetition frequency was up to 50 Hz. The use of a passive switch made of an LiF:F/sup -//sub 2/ crystal under optimal lasing conditions did not reduce the energy of the output pulses of the laser compared with that attainable using an electroopticmore » Q switch.« less
  • Single-crystal X-ray diffraction measurements have been carried out on [Nd(dmf){sub 4}(H{sub 2}O){sub 3}({mu}-CN)Fe(CN){sub 5}]{center_dot}H{sub 2}O (1; dmf=dimethylformamide), [Nd(dmf){sub 4}(H{sub 2}O){sub 3}({mu}-CN)Co(CN){sub 5}]{center_dot}H{sub 2}O (2), [La(dmf){sub 4}(H{sub 2}O){sub 3}({mu}-CN)Fe(CN){sub 5}]{center_dot}H{sub 2}O (3), [Gd(dmf){sub 4}(H{sub 2}O){sub 3}({mu}-CN)Fe(CN){sub 5}]{center_dot}H{sub 2}O (4), and [Y(dmf){sub 4}(H{sub 2}O){sub 3}({mu}-CN)Fe(CN){sub 5}]{center_dot}H{sub 2}O (5), at 15(2) K with and without UV illumination of the crystals. Significant changes in unit-cell parameters were observed for all the iron-containing complexes, whereas 2 showed no response to UV illumination. Photoexcited crystal structures have been determined for 1, 3, and 4 based on refinements of two-conformer models, and excited-state occupancies of 78.6(1), 84(6),more » and 86.6(7) % were reached, respectively. Significant bond-length changes were observed for the Fe-ligand bonds (up to 0.19 {angstrom}), the cyano bonds (up to 0.09{angstrom}), and the lanthanide-ligand bonds (up to 0.10{angstrom}). Ab initio theoretical calculations were carried out for the experimental ground-state geometry of 1 to understand the electronic structure changes upon UV illumination. The calculations suggest that UV illumination gives a charge transfer from the cyano groups on the iron atom to the lanthanide ion moiety, {l_brace}Nd(dmf){sub 4}(H{sub 2}O){sub 3}{r_brace}, with a distance of approximately 6 {angstrom} from the iron atom. The charge transfer is accompanied by a reorganization of the spin state on the {l_brace}Fe(CN)6{r_brace} complex, and a change in geometry that produces a metastable charge-transfer state with an increased number of unpaired electrons, thus accounting for the observed photomagnetic effect.« less
  • The operation of a passively Q-switched laser emitting the TEM{sub mn} mode is described. The excited-state absorption losses and nonlinear absorption in the shaded ends of the active element are taken into account. We measured the laser pulse energy for the TEM{sub 00} mode, the ratios of the output energy in transverse TEM{sub mn} modes with m = 0-4, n = 0 and m = 0-3, n = 1 to the TEM{sub 00} mode energy in an erbium-doped glass laser and determined its temporal parameters in the passive Q-switching regime achieved with the help of a Co{sup 2+} : ZnSemore » crystal. It is shown that on passing from one type of the transverse mode to another for invariable parameters of the resonator, the laser pulse energy changes discretely. A change in the radius of the transverse distribution of the TEM{sub 00} mode at the output mirror of the passively Q-switched laser during the development of lasing is estimated. It is found that the relative change in the laser beam cross section on the output mirror under our conditions is less than 2%. The experimental data obtained in the study are in good agreement with our calculations. (special issue devoted to the 25th anniversary of the a.m. prokhorov general physics institute)« less