Abstract
The thermal expansion coefficient and dn/dT
are measured by interferometry techniques in undoped YAG below 300
K. The thermal expansion coefficient at 125 K is measured to be
2.70 × 10-6 K-1 and
dn/dT at 633 nm is 2.5 ×
10-6 K-1, compared with 7 ×
10-6 K-1 and 9 × 10-6
K-1 for these quantities at 300 K.
© 1999 Optical Society of America
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