Single crystal of Yb x Y 1- x Al 3(BO 3) 4 (Yb∶YAB) was grown by using flux method based on the potassium trimolybdate. 160 mW efficient continuous wave green output was obtained from a fibre coupled 976 nm laser dio...Single crystal of Yb x Y 1- x Al 3(BO 3) 4 (Yb∶YAB) was grown by using flux method based on the potassium trimolybdate. 160 mW efficient continuous wave green output was obtained from a fibre coupled 976 nm laser diode. The conversion efficiency is larger than 11 3%, and the electrical input green conversion efficiency is 3 9%. Tunable green output from 513 0 to 545 8 nm is also demonstrated with a quartz birefringent filter. By enhancing the incident pump power, 1 1 W cw green output can be reached.展开更多
As early as the end of the 1960s, people already put forward an idea of LSFD crystal.In 1979 V. G. Dmitriev et al. first produced LSFD Nd:LN crystal and observed thephenomenon of LSFD in their laboratory. In 1981 L. M...As early as the end of the 1960s, people already put forward an idea of LSFD crystal.In 1979 V. G. Dmitriev et al. first produced LSFD Nd:LN crystal and observed thephenomenon of LSFD in their laboratory. In 1981 L. M. Dorozhkin et al. reportedthe LSFD effect of NYAB crystal from 1.32μm to 0.66μm. In 1990 N. Y. Chou etal. first briefly reported the investigation on the third LSFD Cr:KTP crystal. Be-fore 1990 we had begun to study the Cr:KTP crystal in our laboratory.展开更多
YCOB,a member of the new crystal family of ReCOB (ReCOB=ReCa 4O(BO 3) 3,Re=La 3+ ,Nd 3+ ,Sm 3+ ,Gd 3+ ,Er 3+ ,Y 3+ ),has received mo re and more attentions in recent few years,because of its excellent nonlinear op tic...YCOB,a member of the new crystal family of ReCOB (ReCOB=ReCa 4O(BO 3) 3,Re=La 3+ ,Nd 3+ ,Sm 3+ ,Gd 3+ ,Er 3+ ,Y 3+ ),has received mo re and more attentions in recent few years,because of its excellent nonlinear op tical (N LO) properties and a great promise as a laser host material.Unfortunately,liking most of nonlinear optical crystals,the laser induced damages were also created in the new crystal family when irradiated by ultraviolet laser.In this report we present our preliminary results of the investigation on the radiation induced damage in YCOB crystals.展开更多
Red,blue and green visible lasers are more attractive with the development of the science and technology.Self frequency doubling is an important approach to realize visible lasers.For self frequency doubling,the basic...Red,blue and green visible lasers are more attractive with the development of the science and technology.Self frequency doubling is an important approach to realize visible lasers.For self frequency doubling,the basic requests are high figure of merit(FOM),high damage threshold,good chemical stability and mechanical properties.Perfection and growth characters are also important for a practical SFD crystal. In recent years,the discovery of rare earth calcium oxyborates has resulted in the renewal in the field of SFD crystal.ReCaO(BO 3) 3(ReCOB)is a new type of novel nonlinear optical crystals which is nearly congruently melt and can be grown with Czochralski method.ReCOB crystals possess high nonlinear coefficients and damage thresholds.They are non hydroscopic and easy cutting and polishing.They belong to monoclinic with point group m and space group cm.The strong anisotropy originated from the low symmetry makes the measurement and application of the crystal more complicated.More than half of naturally existed crystals belongs to low symmetry,consequently,the research on the nonlinear and anisotropic laser optical properties are not only important for ReCOB crystal,but also useful for the applications of other low symmetry crystals.展开更多
文摘Single crystal of Yb x Y 1- x Al 3(BO 3) 4 (Yb∶YAB) was grown by using flux method based on the potassium trimolybdate. 160 mW efficient continuous wave green output was obtained from a fibre coupled 976 nm laser diode. The conversion efficiency is larger than 11 3%, and the electrical input green conversion efficiency is 3 9%. Tunable green output from 513 0 to 545 8 nm is also demonstrated with a quartz birefringent filter. By enhancing the incident pump power, 1 1 W cw green output can be reached.
基金Project supported by the National Natural Science Foundation of China.
文摘As early as the end of the 1960s, people already put forward an idea of LSFD crystal.In 1979 V. G. Dmitriev et al. first produced LSFD Nd:LN crystal and observed thephenomenon of LSFD in their laboratory. In 1981 L. M. Dorozhkin et al. reportedthe LSFD effect of NYAB crystal from 1.32μm to 0.66μm. In 1990 N. Y. Chou etal. first briefly reported the investigation on the third LSFD Cr:KTP crystal. Be-fore 1990 we had begun to study the Cr:KTP crystal in our laboratory.
文摘YCOB,a member of the new crystal family of ReCOB (ReCOB=ReCa 4O(BO 3) 3,Re=La 3+ ,Nd 3+ ,Sm 3+ ,Gd 3+ ,Er 3+ ,Y 3+ ),has received mo re and more attentions in recent few years,because of its excellent nonlinear op tical (N LO) properties and a great promise as a laser host material.Unfortunately,liking most of nonlinear optical crystals,the laser induced damages were also created in the new crystal family when irradiated by ultraviolet laser.In this report we present our preliminary results of the investigation on the radiation induced damage in YCOB crystals.
文摘Red,blue and green visible lasers are more attractive with the development of the science and technology.Self frequency doubling is an important approach to realize visible lasers.For self frequency doubling,the basic requests are high figure of merit(FOM),high damage threshold,good chemical stability and mechanical properties.Perfection and growth characters are also important for a practical SFD crystal. In recent years,the discovery of rare earth calcium oxyborates has resulted in the renewal in the field of SFD crystal.ReCaO(BO 3) 3(ReCOB)is a new type of novel nonlinear optical crystals which is nearly congruently melt and can be grown with Czochralski method.ReCOB crystals possess high nonlinear coefficients and damage thresholds.They are non hydroscopic and easy cutting and polishing.They belong to monoclinic with point group m and space group cm.The strong anisotropy originated from the low symmetry makes the measurement and application of the crystal more complicated.More than half of naturally existed crystals belongs to low symmetry,consequently,the research on the nonlinear and anisotropic laser optical properties are not only important for ReCOB crystal,but also useful for the applications of other low symmetry crystals.
