RbTiOAsO_4(RTA)晶体的电光性能(英文)

Electro-optic Property of RbTiOAsO_4 (RTA) Crystal

测量了ＲｂＴｉＯＡｓＯ４（ＲＴＡ）晶体的电光系数、介电常数和交流电导率，结果为：电光系数γ１３＝１０．８，γ２３＝１７．３，γ３３＝４０．０，γ５１＝１２．３，γ４２＝１４．６ｐｍ／Ｖ；介电常数ε１１＝ε２２＝１２，ε３３＝２１；交流电导率σｃ＝３．６×１０－８ｓ／ｃｍ。结果表明ＲＴＡ晶体波导调制器的品质因子ｎ７γ２／ε比ＫＴＰ晶体高１５％，但是其交流电导率比ＫＴＰ晶体小了两个数量级。这些性能使ＲＴＡ晶体有希望应用于波导调制器和其它电光器件。

The electro-optic coefficients,dielectric constants and conducti vity of RbTiOAsO4(RTA) crystal have been measured for the first time.The resul t ants obtained are the eletro-optic coefficients γ13=10.8,γ23=17.3, γ33=40.0,γ51=12.3,γ41=14.6pm/V;the dielectric constants ε 11=ε12=12,ε33=21；the alternative conductivity σc=3.6×10 -8s/cm.It is shown that the figure of merit for waveguide modulaters of RTA crystal n7γ2/ε is 15% higher than that of KTP crystal but its alternative conductivity is two orders lower than the KTP's.These properties make RTA crysta l promising for the applications of waveguide modulators and other electro-optic elements.