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LGYSB:Nd─High-Performance Lasing in the Near-Infrared Region.

Alin Broasca1, Madalin Greculeasa1,2, Flavius Voicu1

  • 1National Institute for Laser, Plasma and Radiation Physics, 409 Atomistilor, Magurele 077125, Romania.

Journal of the American Chemical Society
|January 12, 2024
PubMed
Summary
This summary is machine-generated.

Newly grown LaNdGdYSc borate (LGYSB:Nd) crystals exhibit promising laser properties. The LGYSB:Nd_3 crystal demonstrated high slope efficiencies, indicating potential for advanced laser applications.

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Area of Science:

  • Solid-state laser materials
  • Crystal growth and characterization
  • Nonlinear optics

Background:

  • The development of novel laser materials is crucial for advancing optical technologies.
  • Lanthanum, Neodymium, Gadolinium, Yttrium, and Scandium borate (LGYSB:Nd) crystals offer a unique host matrix for laser applications.
  • Understanding crystal structure and optical properties is key to optimizing laser performance.

Purpose of the Study:

  • To grow novel incongruent melting LGYSB:Nd crystals with varying Yttrium concentrations using the Czochralski method.
  • To characterize the structural, optical, and nonlinear optical properties of the grown crystals.
  • To evaluate the laser performance of the LGYSB:Nd crystals.

Main Methods:

  • Czochralski crystal growth method.
  • Inductively coupled plasma mass spectrometry (ICP-MS) for composition analysis.
  • Optical spectroscopy (transmission, absorption, emission) for optical property determination.
  • Third-harmonic generation experiments for nonlinear susceptibility measurement.
  • Laser operation testing.

Main Results:

  • Successfully grew three incongruent melting LGYSB:Nd crystals with different Y concentrations.
  • LGYSB:Nd crystals possess an acentric structure (space group R32), similar to huntite.
  • Measured optical properties including transmission spectra, absorption cross-section (1.18 × 10⁻¹⁹ cm² at 808 nm), and emission cross-section (1.74 × 10⁻¹⁹ cm² at 1064 nm).
  • Determined a third-order nonlinear optical susceptibility (χ⁽³⁾) and a fluorescence lifetime (τ = 115 μs).
  • LGYSB:Nd_3 laser achieved high slope efficiencies (ηsa = 0.74 quasi-cw, 0.64 cw) at 1062 nm.

Conclusions:

  • The Czochralski method is effective for growing LGYSB:Nd crystals.
  • LGYSB:Nd crystals exhibit favorable optical and nonlinear optical properties for laser applications.
  • The LGYSB:Nd_3 crystal demonstrates excellent laser performance, making it a promising candidate for solid-state lasers.