Nonlinear and Quantum Optics on the Nature of Sugar Emission Excited by the First Harmonic of a Nd Laser

V. I. Oleshko, V. P. Tzipilev, A. N. Yakovlev, G. V. Murastov, N. A. Alekseev

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The physical nature of emissions excited in pressed-sugar samples by the first harmonic of a neodymium laser (1064 nm, 12 ns) is studied. The spectral, kinetic, spatial, and amplitude characteristics of emissions upon single- and multipulse irradiation with energy densities of 0.012–3.2 J/cm2 are measured. It is found that excitation of a sample by the first pulse causes two emission types, namely, emission of the second harmonic of a Nd laser (532 nm) and glowing of dense low-temperature plasma formed as a result of a low-temperature optical breakdown on absorbing inhomogeneities. Multipulse excitation leads to annealing of absorbing inhomogeneities and to an increase in the optical breakdown threshold.

Original languageEnglish
Pages (from-to)834-837
Number of pages4
JournalOptics and Spectroscopy (English translation of Optika i Spektroskopiya)
Volume124
Issue number6
DOIs
Publication statusPublished - 1 Jun 2018

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

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