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Title: Passive Q-switching of a 1.66-{mu}m Er{sup 3+}:YAlO{sub 3} laser by means of a Cr{sup 2+}:ZnSe crystal

Abstract

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)

Authors:
; ;  [1]; ;  [2];  [3]
  1. A.M. Prokhorov General Physics Institute, Russian Academy of Sciences, Moscow (Russian Federation)
  2. International Laser Center, Belarus State Technical University, Minsk (Belarus)
  3. Institute of Solid-State and Semiconductor Physics, National Academy of Sciences of Belarus, Minsk (Belarus)
Publication Date:
OSTI Identifier:
21466659
Resource Type:
Journal Article
Resource Relation:
Journal Name: Quantum Electronics (Woodbury, N.Y.); Journal Volume: 37; Journal Issue: 4; Other Information: DOI: 10.1070/QE2007v037n04ABEH013498
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CHROMIUM IONS; CRYSTALS; ERBIUM IONS; LASER RADIATION; PULSES; Q-SWITCHING; ZINC SELENIDES; CHALCOGENIDES; CHARGED PARTICLES; ELECTROMAGNETIC RADIATION; IONS; RADIATIONS; SELENIDES; SELENIUM COMPOUNDS; ZINC COMPOUNDS

Citation Formats

Galagan, B I, Denker, B I, Sverchkov, S E, Kuleshov, N V, Kisel', V E, and Levchenko, V I. Passive Q-switching of a 1.66-{mu}m Er{sup 3+}:YAlO{sub 3} laser by means of a Cr{sup 2+}:ZnSe crystal. United States: N. p., 2007. Web. doi:10.1070/QE2007V037N04ABEH013498.
Galagan, B I, Denker, B I, Sverchkov, S E, Kuleshov, N V, Kisel', V E, & Levchenko, V I. Passive Q-switching of a 1.66-{mu}m Er{sup 3+}:YAlO{sub 3} laser by means of a Cr{sup 2+}:ZnSe crystal. United States. doi:10.1070/QE2007V037N04ABEH013498.
Galagan, B I, Denker, B I, Sverchkov, S E, Kuleshov, N V, Kisel', V E, and Levchenko, V I. Mon . "Passive Q-switching of a 1.66-{mu}m Er{sup 3+}:YAlO{sub 3} laser by means of a Cr{sup 2+}:ZnSe crystal". United States. doi:10.1070/QE2007V037N04ABEH013498.
@article{osti_21466659,
title = {Passive Q-switching of a 1.66-{mu}m Er{sup 3+}:YAlO{sub 3} laser by means of a Cr{sup 2+}:ZnSe crystal},
author = {Galagan, B I and Denker, B I and Sverchkov, S E and Kuleshov, N V and Kisel', V E and Levchenko, V I},
abstractNote = {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)},
doi = {10.1070/QE2007V037N04ABEH013498},
journal = {Quantum Electronics (Woodbury, N.Y.)},
number = 4,
volume = 37,
place = {United States},
year = {Mon Apr 30 00:00:00 EDT 2007},
month = {Mon Apr 30 00:00:00 EDT 2007}
}
  • An investigation was made of the generation of giant pulses in a new yttrium scandium gallium garnet laser crystal doped with holmium (Cr{sup 3+}:Yb{sup 3+}:Ho{sup 3+}:YSGG) operating on the basis of the self-terminating {sup 5}I{sub 6} - {sup 5}I{sub 7} transition. Q-switching was performed by an electro-optical lithium niobate switch, a passive switch based on an epitaxial film of indium arsenide on a gallium arsenide substrate, or a passive switch consisting of water. The 2.92 {mu}m wavelength dominated giant pulse generation, whereas under free-running conditions the radiation was discretely tunable in the range 2.84 -3.05 {mu}m. Depending on the Q-switchingmore » method, pulses of 60 - 160 ns duration were generated and the pulse energy was {approx}20 mJ. The second and fourth harmonics of the holmium laser radiation were generated and the efficiency of each frequency-multiplication stage was {approx}20%. (lasers)« less
  • The parameters of a Q-switched longitudinally-diode-pumped Tm{sup 3+}:YAlO{sub 3} laser are presented. The pulse repetition rate is f = 1-15 Hz. The maximum average output power is 5 W (at f = 5-15 kHz), the minimum pulse duration is 130 ns (f = 1 kHz), the efficiency is 26% (with the slope efficiency of 58%). The laser wavelength under pumping in the region of 803-805 nm is 1.99 {mu}m. (lasers and amplifiers)
  • 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)
  • Four different erbium laser crystals, two YAG:Er (40 at. %) and two YAlO{sub 3}:Er (30 at. % and 50 at. %), have been compared with respect to their laser thresholds and slope efficiencies. The performance of these laser crystals was further compared with a YSGG:Cr:Er (Y{sub 3}Sc{sub 2}Ga{sub 3}O{sub 12}) (3.6 at. % Cr{sup 3+} and 4 at. % Er{sup 3+}). The experimental results are explained with up-conversion processes in the crystals.
  • 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