DETERMINATION OF THE LASER-INDUCED DAMAGE THRESHOLD OF BULK POLYMER SAMPLES AT 1.06-MU-M USING THE PULSED PHOTOTHERMAL DEFLECTION TECHNIQUE

被引:8
作者
RAJASREE, K
RADHAKRISHNAN, P
NAMPOORI, VPN
VALLABHAN, CPG
机构
[1] Dept. of Phys., Cochin Univ. of Sci. and Technol.
关键词
D O I
10.1088/0957-0233/4/5/008
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
A pulsed Nd-YAG laser beam is used to produce a transient refractive index gradient in air adjoining the plane surface of the sample material. This refractive index gradient is probed by a continuous He-Ne laser beam propagating parallel to the sample surface. The observed deflection signals produced by the probe beam exhibit drastic variations when the pump laser energy density crosses the damage threshold for the sample. The measurements are used to estimate the damage threshold for a few polymer samples. The present values are found to be in good agreement with those determined by other methods.
引用
收藏
页码:591 / 595
页数:5
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