Growth, optical properties, and CW laser action of neodymium-doped gadolinium scandium aluminum garnet

Author

Brandle, C.D., Jr. ; Vanderleeden, J.C.

Author_Institution

Bell Laboratories, Murray Hill, NJ

Volume

10

Issue

1

fYear

1974

fDate

1/1/1974 12:00:00 AM

Firstpage

67

Lastpage

71

Abstract

Investigation of the congruent melting rare-earth aluminum garnet Gd3Sc2Al3O12(GADSCAG) has been made. The optimum crystal growth parameters for the undoped material are a rotation rate of 20 r/min and a growth rate of 4.6 mm/hr along the $\\langle 111\\rangle$ direction. For Nd³⁺-doped crystals the linear growth rate is 2 mm/h. The optical properties of Nd:GADSCAG which are of interest for laser operation were also determined. The stimulated emission cross section of the 1.06-μ transition in Nd³⁺at room temperature is $(3.2 \\pm 0.3) \\times 10^{-19}$ cm², the fluorescence lifetime is $256 \\pm 8 \\mu$ s at an Nd³⁺ion density of 1 atomic percent in the crystal and the integrated peak absorption cross section in the strongest pump band (0.81 μ) is $3.8 \\times 10^{-19}$ cm², A comparison of the CW laser performance of identical ND:YAG and Nd:GADSCAG rods is presented.

Keywords

Aluminum; Crystalline materials; Crystals; Garnets; Laser transitions; Neodymium; Optical materials; Optical pumping; Stimulated emission; Temperature;

fLanguage

English

Journal_Title

Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

0018-9197

Type

jour

DOI

10.1109/JQE.1974.1068074

Filename

1068074