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Title: Small autonomous passively Q-switched Nd{sup 3+}:YAG laser with a Cr{sup 4+}:YAG Q switch emitting pulse trains

Abstract

The energy and time characteristics of a passively Q-switched Nd{sup 3+}:YAG laser with a Cr{sup 4+}:YAG Q switch emitting pulse trains are studied and analysed theoretically. The description and technical parameters of a small autonomous laser with intracavity second-harmonic generation (ICSHG) in the pulse-train regime are presented. The laser provides a high total pulse-train energy for a relatively low peak power of a single pulse, stable operation in a wide temperature range, and has a small weight and size, which is convenient in operation. The enhanced reliability and stability of the laser operation are provided by its original technical design: the ICSHG scheme for type II phase matching without polarisers, the use of temperature-noncritical phase matching in KTP crystals, dust- and moisture-proof casing, and battery-operated pulsed power supply for the pump flashlamp. (lasers)

Authors:
; ; ; ; ;  [1]
  1. M.F. Stel'makh Polyus Research and Development Institute, Moscow (Russian Federation)
Publication Date:
OSTI Identifier:
21466646
Resource Type:
Journal Article
Resource Relation:
Journal Name: Quantum Electronics (Woodbury, N.Y.); Journal Volume: 37; Journal Issue: 4; Other Information: DOI: 10.1070/QE2007v037n04ABEH013437
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CHROMIUM IONS; COVERINGS; CRYSTALS; DESIGN; HARMONIC GENERATION; NEODYMIUM IONS; NEODYMIUM LASERS; PEAK LOAD; PULSES; Q-SWITCHING; RELIABILITY; TEMPERATURE RANGE; CHARGED PARTICLES; FREQUENCY MIXING; IONS; LASERS; SOLID STATE LASERS

Citation Formats

Buzinov, N M, Dmitriev, Valentin G, Zabavin, V N, Kazakov, A A, Maslov, A A, and Spitsyn, E M. Small autonomous passively Q-switched Nd{sup 3+}:YAG laser with a Cr{sup 4+}:YAG Q switch emitting pulse trains. United States: N. p., 2007. Web. doi:10.1070/QE2007V037N04ABEH013437.
Buzinov, N M, Dmitriev, Valentin G, Zabavin, V N, Kazakov, A A, Maslov, A A, & Spitsyn, E M. Small autonomous passively Q-switched Nd{sup 3+}:YAG laser with a Cr{sup 4+}:YAG Q switch emitting pulse trains. United States. doi:10.1070/QE2007V037N04ABEH013437.
Buzinov, N M, Dmitriev, Valentin G, Zabavin, V N, Kazakov, A A, Maslov, A A, and Spitsyn, E M. Mon . "Small autonomous passively Q-switched Nd{sup 3+}:YAG laser with a Cr{sup 4+}:YAG Q switch emitting pulse trains". United States. doi:10.1070/QE2007V037N04ABEH013437.
@article{osti_21466646,
title = {Small autonomous passively Q-switched Nd{sup 3+}:YAG laser with a Cr{sup 4+}:YAG Q switch emitting pulse trains},
author = {Buzinov, N M and Dmitriev, Valentin G and Zabavin, V N and Kazakov, A A and Maslov, A A and Spitsyn, E M},
abstractNote = {The energy and time characteristics of a passively Q-switched Nd{sup 3+}:YAG laser with a Cr{sup 4+}:YAG Q switch emitting pulse trains are studied and analysed theoretically. The description and technical parameters of a small autonomous laser with intracavity second-harmonic generation (ICSHG) in the pulse-train regime are presented. The laser provides a high total pulse-train energy for a relatively low peak power of a single pulse, stable operation in a wide temperature range, and has a small weight and size, which is convenient in operation. The enhanced reliability and stability of the laser operation are provided by its original technical design: the ICSHG scheme for type II phase matching without polarisers, the use of temperature-noncritical phase matching in KTP crystals, dust- and moisture-proof casing, and battery-operated pulsed power supply for the pump flashlamp. (lasers)},
doi = {10.1070/QE2007V037N04ABEH013437},
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}
}
  • We demonstrate, for the first time as far as we know, a passively Q-switched operation of a Nd:YVO{sub 4} laser in which a Cr{sup 4+}:YAG crystal and a laser-diode bar are used as the saturable absorber and the pump source, respectively. Stable laser pulses as short as 28 ns with 20-{mu}J energy can be generated with this laser, which has the advantages of simplicity, high efficiency, and good long-term stability. {copyright} 1997 Optical Society of America
  • The performance of a flash-lamp-pumped self-frequency-doubled Nd{sup 3+}:GdCa{sub 4}O(BO{sub 3}){sub 3} (Nd:GdCOB) laser that is passively Q switched with Cr{sup 4+}:YAG saturable absorbers is demonstrated. The maximum 0.53-{mu}m pulse energy obtained is 2.6 mJ, and the maximum peak intensity is 15 MW/cm2. The dependence of the pulse characteristics on the orientation of the saturable absorber and on the cavity length is measured. Meanwhile, the transversal distribution of the intracavity photon density is taken into account in the rate equations for an intracavity frequency-doubled passively Q-switched laser, and the solutions are used to account for the behavior of the passively Q-switchedmore » Nd:GdCOB laser. {copyright} 2001 Optical Society of America« less
  • We report a new configuration of a high-repetition rate nanosecond laser based on a semiconductor saturable absorber mirror (SESAM). The SESAM is conventional technical solution for passive mode-locking at 1064 nm and simultaneously used as a highly reflecting mirror and a saturable absorber in a high-Q and short cavity of a cw diode-end-pumped a-cut Nd{sup 3+}:YVO{sub 4} laser. Two laser beams are coupled out from the cavity using an intracavity low-reflection thin splitter. The laser characteristics are investigated as functions of pump and resonator parameters. Using a 1.8-W cw pump laser diode at 808 nm, the passively Q-switched SESAMbased lasermore » generates 22-ns pulses with an average power of 275 mW at a pulse repetition rate of 2250 kHz.« less
  • High-peak power, passively Q-switched, composite Nd : YAG/Cr{sup 4+} : YAG lasers consisting of all-polycrystalline bonded Nd:YAG and Cr{sup 4+}:YAG ceramics are developed, and two applications of such lasers are discussed. A 1.1-at. %-doped Nd:YAG/Cr{sup 4+}:YAG ceramic laser is fabricated, which is quasi-cw pumped by a diode laser in the Hz-range, delivering laser pulses of 2.5-mJ energy and 1.9-MW peak power. By frequency doubling the laser output in a LiB{sub 3}O{sub 5} (LBO) nonlinear crystal at room temperature, 0.36-mJ, 0.3-MW green laser pulses with 27 % conversion efficiency are produced at 532 nm. Furthermore, a highly doped (1.5-at. %) Nd:YAG/Cr{supmore » 4+}:YAG ceramic laser operates successfully in the range of pulse repetition rates from 50 to 500 Hz, yielding 0.8-to-1.0 mJ pulses with a peak power around 1 MW. The laser output beam is amplified in a master-oscillator - power-amplifier (MOPA) system to generate laser pulses with 11-mJ energy at a 250-Hz repetition rate. (lasers)« less
  • Pulsed oscillation of a diode-pumped passively Q-switched Nd{sup 3+}:Ca{sub 3}Ga{sub 2}Ge{sub 3}O{sub 12} (Nd:CGGG) solid-state laser is studied. For the absorbed pump power of 0.8 W, the pulse energy was 3.5 {mu}J and the pulse rise time, duration and decay time were 6, 11 and 13 ns, respectively. The pulse repetition rate varied from 3 to 13 kHz when the absorbed pump power was changed from 0.45 to 1 W. It is shown that all the temporal parameters of the generated pulse decrease with increasing the absorbed pump power. The sensitivities of these parameters and the pulse repetition rate tomore » changes in the absorbed pump power and the laser resonator length are measured. The results of the research are compared with the corresponding results for the pulsed Nd:YAG laser operating under the same conditions. (lasers)« less