Growth of a Cr, Tm, Ho:YAG crystal and its optical and laser characteristics

Zygmunt Frukacz; Jaroslaw Kisielewski; Zygmunt Mierczyk; Waldemar Zendzian

doi:10.1117/12.203278

1 March 1995 Growth of a Cr, Tm, Ho:YAG crystal and its optical and laser characteristics

Zygmunt Frukacz, Jaroslaw Kisielewski, Zygmunt Mierczyk, Waldemar Zendzian

Proceedings Volume 2202, Laser Technology IV: Research Trends, Instrumentation, and Applications in Metrology and Materials Processing; (1995) https://doi.org/10.1117/12.203278
Event: Laser Technology: Fourth Symposium, 1993, Szczecin, Poland

Abstract

Yttrium aluminum garnets doped by Cr, Tm, and Ho have been obtained by Czochralski method using iridium crucible and HF heating. Assumed concentrations of dopants are n(Cr) equals 2.3 X 10²⁰ cm^-3, n(Tm) equals 7.9 X 10²⁰ cm^-3 and n(Ho) equals 5 X 10¹⁹ cm^-3, respectively. Moreover, the distribution coefficients for chromium (Cr), thulium (Tm), and holmium (Ho) are 2.4, 1.2, and 1, respectively. Thus, the concentrations of Cr and Tm dopants change along the crystal. Monocrystals having 28% of the initial mass of the crucible ingot and 75 mm long have been obtained. The concentrations of dopants calculated with the help of the normal freeze equation at the end of the crystal are n(Cr) equals 1.45 X 10²⁰ cm^-3, n(Tm) equals 7.4 X 10²⁰ cm^-3, respectively. The absorptive, luminescence as well as energetic properties of laser rods, having 4 mm diameter and the length equal 63 divided by 67 mm, have been investigated. It is shown that the energetic characteristics of the obtained crystals depend strongly on the annealing in the oxidizing atmosphere.

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Zygmunt Frukacz, Jaroslaw Kisielewski, Zygmunt Mierczyk, and Waldemar Zendzian "Growth of a Cr, Tm, Ho:YAG crystal and its optical and laser characteristics", Proc. SPIE 2202, Laser Technology IV: Research Trends, Instrumentation, and Applications in Metrology and Materials Processing, (1 March 1995); https://doi.org/10.1117/12.203278

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KEYWORDS

Crystals

Chromium

Thulium

Holmium

Rod lasers

Laser crystals

Annealing

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