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

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2 Author(s)
Brandle, C. ; Bell Laboratories, Murray Hill, NJ ; Vanderleeden, J.C.

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 thelangle111rangledirection. 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 is256 pm 8 mus 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) is3.8 times 10^{-19}cm2, A comparison of the CW laser performance of identical ND:YAG and Nd:GADSCAG rods is presented.

Published in:

Quantum Electronics, IEEE Journal of  (Volume:10 ,  Issue: 1 )

Date of Publication:

Jan 1974

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