Abstract
An Nd:glass disc requires an edge cladding to absorb the amplified
spontaneous emission. The absorption is determined by reflections (R) from disc
edges. R is primarily induced by the refractive index (n) mismatch. Thus, the
temperature at the cladding interface increases due to absorption, and leads to the
variation of n. In order to investigate the effect of temperature on the refractive
index match, temperature coefficients (dn/dT) of the laser glass, adhesive polymer,
and cladding glass are measured. The effect of temperature on the refractive index
match is discussed. Results show that the indices match below 40°C.
© 2014 Chinese Optics Letters
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