In this paper a high-repetition-rate mid-infrared （mid-IR） optical parametric oscillator based on periodically poled MgO-doped LiNbO3 （PPMgLN） at room temperature was demonstrated. The maximum average mid-IR outpu...In this paper a high-repetition-rate mid-infrared （mid-IR） optical parametric oscillator based on periodically poled MgO-doped LiNbO3 （PPMgLN） at room temperature was demonstrated. The maximum average mid-IR output power at 3.63μm was 1.02 W with the repetition rate of 60kHz and corresponding efficiency from the pump to the idler was 26.7%. The temperature tuning and the period tuning characteristics were also discussed.展开更多
Alternating current poling(ACP)in air by changing poling temperature(70e130℃)and voltages(2e6 kVrms/cm)on pseudo-ternary 0.24 Pb(In_(1/2)Nb_(1/2))O_(3)-0.46 Pb(Mg1/3Nb_(2/3))O3-0.30PbTiO_(3)(PIMN-0.30PT)single crysta...Alternating current poling(ACP)in air by changing poling temperature(70e130℃)and voltages(2e6 kVrms/cm)on pseudo-ternary 0.24 Pb(In_(1/2)Nb_(1/2))O_(3)-0.46 Pb(Mg1/3Nb_(2/3))O3-0.30PbTiO_(3)(PIMN-0.30PT)single crystals(SCs)manufactured by continuous-feeding Bridgman(CF BM)method was investigated.Free dielectric permittivity(εT 33/ε0)and piezoelectric constant(d33)were improved to be 7000 and 2340 pC/N,which were 29%higher than those of direct current poling(DCP)at 90℃ with 4 kV/cm(εT 33/ε0=5440,d_(33)=1810 pC/N).However,phase change temperature(Tpc)decreased from 94℃ to 78℃ as opposite results reported by other groups.We demonstrated that the high temperature(HT)ACP improved piezoelectric performance of CF BM SCs,however,the Tpc were different from other crystal growth method.The well-designed ACP process was a promising method for mass production not only to enhance the electrical properties for the pseudo-ternary SCs but also reduce the risk of breakdown and realizes organic solvent-free poling process.展开更多
Lead-free(K_(0.4425)Na_(0.52)Li_(0.0375))(Nb_(0.8825)Sb_(0.07)Ta_(0.0475))O_(3)(KNLNST)piezoelectric ceramics are synthesized by the conventional solid-state reaction method.The sintering temperature and poling temper...Lead-free(K_(0.4425)Na_(0.52)Li_(0.0375))(Nb_(0.8825)Sb_(0.07)Ta_(0.0475))O_(3)(KNLNST)piezoelectric ceramics are synthesized by the conventional solid-state reaction method.The sintering temperature and poling temperature dependence of ceramic properties are investigated.Previous studies have shown that variation of sintering temperature can cause phase transition,similar to the morphotropic phase boundary(MPB)behavior induced by composition changes in Pb(Zr,Ti)O_(3)(PZT).And the best piezoelectric performance can be obtained near the phase-transition sintering temperature.In this research,phase transition induced by sintering temperature cannot be detected and excellent piezoelectric properties can still be obtained.The sintering temperature of the largest piezoelectric coefficient of such composition is lower than that of the highest density,which is considered in composition segregation as a result of intensified volatilization of alkali metal oxides.Combined with the effect of poling temperature,the peak values of the piezoelectric properties are d_(33)=313 pC/N,k_(p)=47%,ε_(r)=1825,tanδd=0.024,T_(o-t)=88℃,and TC=274℃.展开更多
基金Project supported by the National Natural Science Foundation of China (Grant Nos 60637010 and 10471071)the Ministry of Education of China+1 种基金the National Research Foundation for the Doctoral Program of Ministry of Education of China (Grant No20040056010)Tianjin Application Bases and Advanced Technology Plan (Grant No 07JCYBJC06200)
文摘In this paper a high-repetition-rate mid-infrared （mid-IR） optical parametric oscillator based on periodically poled MgO-doped LiNbO3 （PPMgLN） at room temperature was demonstrated. The maximum average mid-IR output power at 3.63μm was 1.02 W with the repetition rate of 60kHz and corresponding efficiency from the pump to the idler was 26.7%. The temperature tuning and the period tuning characteristics were also discussed.
文摘Alternating current poling(ACP)in air by changing poling temperature(70e130℃)and voltages(2e6 kVrms/cm)on pseudo-ternary 0.24 Pb(In_(1/2)Nb_(1/2))O_(3)-0.46 Pb(Mg1/3Nb_(2/3))O3-0.30PbTiO_(3)(PIMN-0.30PT)single crystals(SCs)manufactured by continuous-feeding Bridgman(CF BM)method was investigated.Free dielectric permittivity(εT 33/ε0)and piezoelectric constant(d33)were improved to be 7000 and 2340 pC/N,which were 29%higher than those of direct current poling(DCP)at 90℃ with 4 kV/cm(εT 33/ε0=5440,d_(33)=1810 pC/N).However,phase change temperature(Tpc)decreased from 94℃ to 78℃ as opposite results reported by other groups.We demonstrated that the high temperature(HT)ACP improved piezoelectric performance of CF BM SCs,however,the Tpc were different from other crystal growth method.The well-designed ACP process was a promising method for mass production not only to enhance the electrical properties for the pseudo-ternary SCs but also reduce the risk of breakdown and realizes organic solvent-free poling process.
基金This study was supported by the National Natural Science Foundation of China(No.51172108)the project funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions.
文摘Lead-free(K_(0.4425)Na_(0.52)Li_(0.0375))(Nb_(0.8825)Sb_(0.07)Ta_(0.0475))O_(3)(KNLNST)piezoelectric ceramics are synthesized by the conventional solid-state reaction method.The sintering temperature and poling temperature dependence of ceramic properties are investigated.Previous studies have shown that variation of sintering temperature can cause phase transition,similar to the morphotropic phase boundary(MPB)behavior induced by composition changes in Pb(Zr,Ti)O_(3)(PZT).And the best piezoelectric performance can be obtained near the phase-transition sintering temperature.In this research,phase transition induced by sintering temperature cannot be detected and excellent piezoelectric properties can still be obtained.The sintering temperature of the largest piezoelectric coefficient of such composition is lower than that of the highest density,which is considered in composition segregation as a result of intensified volatilization of alkali metal oxides.Combined with the effect of poling temperature,the peak values of the piezoelectric properties are d_(33)=313 pC/N,k_(p)=47%,ε_(r)=1825,tanδd=0.024,T_(o-t)=88℃,and TC=274℃.
