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Title: Laser amplifier based on a neodymium glass rod 150 mm in diameter

Abstract

A unique large-aperture neodymium glass rod amplifier is experimentally studied. The small-signal gain distribution is measured at different pump energies. The aperture-averaged gain is found to be 2.3. The stored energy (500 J), the maximum possible pump pulse repetition rate, and the depolarisation in a single pulse and in a series of pulses with a repetition rate of one pulse per five minutes are calculated based on the investigations performed. It is shown that the use of this amplifier at the exit of the existing laser can increase the output pulse energy from 300 to 600 J. (lasers)

Authors:
; ; ; ; ; ;  [1];  [2]
  1. Institute of Applied Physics, Russian Academy of Sciences, Nizhnii Novgorod (Russian Federation)
  2. Public Limited Company "Scientific research Institute for Optoelectronic Instrument Engineering", Leningrad region (Russian Federation)
Publication Date:
OSTI Identifier:
22375910
Resource Type:
Journal Article
Resource Relation:
Journal Name: Quantum Electronics (Woodbury, N.Y.); Journal Volume: 44; Journal Issue: 5; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; AMPLIFIERS; LASERS; NEODYMIUM; PULSES; SIGNALS; STORED ENERGY

Citation Formats

Shaykin, A A, Fokin, A P, Soloviev, A A, Kuzmin, A A, Shaikin, I A, Burdonov, K F, Khazanov, E A, and Charukhchev, A V. Laser amplifier based on a neodymium glass rod 150 mm in diameter. United States: N. p., 2014. Web. doi:10.1070/QE2014V044N05ABEH015440.
Shaykin, A A, Fokin, A P, Soloviev, A A, Kuzmin, A A, Shaikin, I A, Burdonov, K F, Khazanov, E A, & Charukhchev, A V. Laser amplifier based on a neodymium glass rod 150 mm in diameter. United States. doi:10.1070/QE2014V044N05ABEH015440.
Shaykin, A A, Fokin, A P, Soloviev, A A, Kuzmin, A A, Shaikin, I A, Burdonov, K F, Khazanov, E A, and Charukhchev, A V. Fri . "Laser amplifier based on a neodymium glass rod 150 mm in diameter". United States. doi:10.1070/QE2014V044N05ABEH015440.
@article{osti_22375910,
title = {Laser amplifier based on a neodymium glass rod 150 mm in diameter},
author = {Shaykin, A A and Fokin, A P and Soloviev, A A and Kuzmin, A A and Shaikin, I A and Burdonov, K F and Khazanov, E A and Charukhchev, A V},
abstractNote = {A unique large-aperture neodymium glass rod amplifier is experimentally studied. The small-signal gain distribution is measured at different pump energies. The aperture-averaged gain is found to be 2.3. The stored energy (500 J), the maximum possible pump pulse repetition rate, and the depolarisation in a single pulse and in a series of pulses with a repetition rate of one pulse per five minutes are calculated based on the investigations performed. It is shown that the use of this amplifier at the exit of the existing laser can increase the output pulse energy from 300 to 600 J. (lasers)},
doi = {10.1070/QE2014V044N05ABEH015440},
journal = {Quantum Electronics (Woodbury, N.Y.)},
number = 5,
volume = 44,
place = {United States},
year = {Fri May 30 00:00:00 EDT 2014},
month = {Fri May 30 00:00:00 EDT 2014}
}
  • An experimental investigation was made of the parameters of 60-mm-diameter amplifiers pumped in various enclosures. A study was made of the influence of flashlamps, nature of the enclosure, and neodymium concentration on the gain. The maximum output energies of the amplifiers were calculated for circular and linear polarizations, and these were compared with the experimental values. Estimates were obtained of the parameters of rod amplifiers with apertures right up to 150 mm.
  • A neodymium amplifier with lambda/4-decoupling and a stimulated Mandel'shtam-Brillouin scattering (SMBS) mirror is tested experimentally. The advantages of this type of amplifier compared with other schemes are discussed. A contrast approx.5 x 10/sup -3/ was obtained with lambda/4-decoupling. The performance of CCl/sub 4/ and K-8 glass SMBS mirrors was studied over a wide range of pumping energies. It is shown that breakdown of the laser medium does not cut off the wave front inversion process, so that SMBS mirrors can be used in multipass amplifier schemes. Reflection of a time-modulated pulse from an SMBS mirror with high angular directivity ismore » demonstrated.« less
  • Photographic-film apodizing apertures were developed and used in a high-power laser system with neodymium-doped phosphate glass rods as the active elements, is reported. The aperture of the output amplifier state was 45 mm. The parameters of the optical system of the amplifier channel were taken into account in the development of the transmission profiles of the apodizing apertures. A method of estimating the Fresnel number of the channel was developed and the principles of building an amplifier channel with an optical repeater were considered. An experimental investigation was made of the gain of beams having an approximately rectangular spatial profile.more » An output beam had a peak power of 50 GW and suffered no appreciable loss of brightness as a result of small-scale self-focusing.« less
  • The gain achieved in an eight-pass amplifier with a stimulated Brillouin scattering mirror was up to 3 x 10/sup 5/ for nanosecond pulses with an input energy of approx.10 ..mu..J.
  • A description is given of a laser amplifier with a disk active element made of GLS2 (40 x 40 x 220 mm dimensions). This amplifier is filled with thionyl chloride (n=1.53, absorption coefficient k<10/sup -3/ cm/sup -1/ at lambda=1.06 ..mu..). The single-pass inactive losses, per 1 cm length of the active medium, are 4.3 x 10/sup -3/ cm/sup -1/. The results are reported of measurements of the small-signal gain and of the gain obtained at pump energy densities up to 25 J/cm/sup 3/.