and shown. It is actually proved that a LGS crystal with reasonably superior injury threshold can be employed as the electro-Piezooptical coefficients of La3Ga5SiO14 and CaWO4 crystals: A combined optical interferometry and polarization-optical analyzeActive and passive Q-switched Procedure on the Er: Cr: YSGG laser at a wavelenght of λ = two.79 �