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Dr. Frank J. Bruni, Consultant

I am a consultant in the field of synthetic crystal growth specializing in oxide crystals for the laser and electro-optics industries. I have over 40 years’ experience in the growth and characterization of crystals. My main area of focus for the past 5 years has been sapphire grown by the Kyropoulos, Czochralski and EFG methods.  My expertise has also been with the synthetic garnets gadolinium gallium garnet (GGG), yttrium aluminum garnet (YAG) and with alexandrite, but I also have extensive experience with a wide variety of other materials such as lithium niobate and scintillator crystals as shown in the table below.

 

Name Acronym Formula Comments
Oxides
Gadolinium Gallium Garnet GGG Gd3Ga5O12 Crystals up to 110 mm in diameter both undoped and doped with neodymium.
Yttrium Aluminum Garnet YAG Y3Al5O12 Crystals up to 75 mm in diameter both undoped and doped with neodymium
Sapphire Al2O3 Crystals grown by Czochralski, EFG and Kyropoulos up to 90 kg
Lithium Niobate LNO LiNbO3 Crystals up to 100 mm in diameter.
Lithium Tantalate LTO LiTaO3 Crystals up to 100 mm in diameter.
Ca-Zr substituted GGG SGGG Gd3-xCaxGa5-yZryO12
Neodymium Gallium Garnet NGG Nd3Ga5O12
Samarium Gallium Garnet SGG Sm3Ga5O12
Lutetium Orthosilicate LSO Lu2(SiO4)O:Ce Scintillator crystals.
Alexandrite Cr:BeAl2O4 Laser crystals
Ferrites Nominally Fe3O4 Bridgman. Various compositions.
Semicondcutors
Gallium Arsenide GaAs GaAs Liquid encapsulated Czochralski.
Indium Antimonide InSb InSb Czochralski
Metals
Copper Cu Czochralski and Bridgman.
Halides
Yttrium Lithium Fluoride YLF YLiF4 Neodymium doped.
Sodium Chloride Salt NaCl Czochralski