Alpha-Lithium Iodate

   Alpha－Lithium Iodate, which is a non-ferroelectric polarcrystal with large non-linear optical coefficient and high radiation resistivity, is used in laser technique as the medium to generate secondary harmonic and parametric oscillation.

   It is also an ideal material for making narrow-pulse, wide-band ultrasonic transducers in industries of aviation, chemical engineering, metallurgy and petroleum, etc. The products won the gold and silver prizes on“14SALON INTERNATIONAL DES INVENTIONS ETDES TECHNIQUES NOUVELLES GENEVE 1986 ”and “WORLD FAIR FOR INVENTION, BRUSSELS, 1986” respectively. It has been exported to Europe and U.S.A . since 1981.

Specifications:

• Range of wave length for transmitted light:  0.5-5.0μm(transmissivity86%)

• Optical homogeneity:  the change of refractive index 10^-5-10^-6/cm.

• SHG conversion efficiency for Nd laser light:  34%.

• Damage threshold for 1.06μm laser light:  50MW/cm².

• For parametric oscillation, Continuous tunable light can be obtained from 0.9μm to 1.2μm.

• Dielectric constant ε=6.

• Mechano-electronic couplin, coefficient for thickness mode Kt=0.51.

• Sensitivity of high frequency probes: 20 times as high as that of the PZT  ceramic.

• Sound impedance Z=18.5×10⁶kg/m².S

• Piezoelectric stress constant g₃₃=320×10^-3V/m .N

• Density ( at room temperature) D=4.502 g/cm³.