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Piezooptic Properties of beta-BaB2O4 and Li2B4O7 Crystals
Martunyuk-Lototska I., Mys O., Dyachok Ya., Dudok T., Adamiv V,
Burak Ya. and Vlokh R.
Institute of Physical Optics, 23 Dragomanov Str., 79005
Lviv, Ukraine
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Photoelastic coefficients of beta-BaB2O4 and Li2B4O7 crystals are calculated
on the basis of piezooptic measurements performed with interferometric
technique and the elastic compliance and stiffness data. Using the experimental
results, the acoustooptic (AO) figure of merit (FM) has been estimated
for the possible geometries of AO interaction. It is shown that the AO
FM for the ABO and LTB crystals reach respectively the values M2=243.4*10-15s3/kg
and M2=2.57*10-15s3/kg, if the interaction with the slowest ultrasonic
waves (v=933.5m/s and v=3173m/s) is concerned. The directions of propagation
and polarization of those acoustic waves are obtained on the basis of construction
of indicative surfaces of the acoustic wave velocities.
Key words: piezooptic effect, borate crystals, photoelastic effect
PACS 78.20.Hp
doi 10.3116/16091833/5/1/19/2004 |
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