Continuous-wave radiation of 5W at 532 nm was produced with an Nd:YVO_(4)/KTP intracavity&equency-doubled laser end-pumped by a diode-laser-array at pump power of 17.2 W,giving optical conversion efRciency of 29.1...Continuous-wave radiation of 5W at 532 nm was produced with an Nd:YVO_(4)/KTP intracavity&equency-doubled laser end-pumped by a diode-laser-array at pump power of 17.2 W,giving optical conversion efRciency of 29.1%.The output power stability was measured to be better than 1.5%in short term operation.The pump-induced thermal lensing was also measured,showing good agreement with the performance of the laser.展开更多
The nonlinear-optical coefficients of RCOB(R=Gd,Y)crystals are measured.The spatial distribution of deff effective nonlinear-optical coefficient is determined subsequently.Our experiments show that the maximum deff oc...The nonlinear-optical coefficients of RCOB(R=Gd,Y)crystals are measured.The spatial distribution of deff effective nonlinear-optical coefficient is determined subsequently.Our experiments show that the maximum deff occurs at the second quadrant.The second-harmonic-generation efficiency reaches 48%for a 6 mm-long,(113.2°,47.4°)-cut GdCOB,and 41.5%for a 5mm-long,(113°,36.5°)-cut YCOB,respectively.The intracavity frequency doubling of GdCOB is reported for the first time.展开更多
A special prism coupling technique with the KBe_(2)BO_(3)F_(2) crystal is adopted to produce deep ultraviolet light including the fourth harmonic from an Nd:YAG laser,for which a conversion efficiency as high as 10%ha...A special prism coupling technique with the KBe_(2)BO_(3)F_(2) crystal is adopted to produce deep ultraviolet light including the fourth harmonic from an Nd:YAG laser,for which a conversion efficiency as high as 10%has been obtained.展开更多
Large sized and optical quality GdCa_(4)O(BO_(3))_(3)(GdCOB)crystal with calcium partially substituted by strontium(Sr)ions was grown for the first time.The x-ray powder diffraction shows that the Sr ion has an effect...Large sized and optical quality GdCa_(4)O(BO_(3))_(3)(GdCOB)crystal with calcium partially substituted by strontium(Sr)ions was grown for the first time.The x-ray powder diffraction shows that the Sr ion has an effect on the cell parameters of the GdCOB crystal Second-harmonic generation(SHG)experiments were performed on the Sr:GdCOB and GdCOB crystals along the spatial phase-matching direction.The results show that the cw green laser output power is 1.04 W when the laser diode pump power is 10 W in the Nd:YVO_(4)/Sr:GdCOB intracavity laser.Considering the slope efficiency of Nd:YVO_(4) and the fundamental laser in cavity,the intracavity SHG conversion efficiency of the GdCOB crystal is 21%while it is 24%for the Sr:GdCOB crystal,the SHG conversion efficiency is improved by 14%.The effect of the Sr ions on the nonlinearity of the GdCOB crystal is also discussed by using the anion group theory.展开更多
We have demonstrated a diode-pumped Nd:YVO4 laser that produced 273mW cw output at 671 nm by using KTP intracavity doubling.The optical-optical efficiency of the all-solid-state red laser was 5.1%.The maximum output p...We have demonstrated a diode-pumped Nd:YVO4 laser that produced 273mW cw output at 671 nm by using KTP intracavity doubling.The optical-optical efficiency of the all-solid-state red laser was 5.1%.The maximum output power of the fundamental wave at 1342nm from Nd:YVO_(4) was 2.3W with slope-efficiency of 43%.展开更多
The rare-earth ions(Yb^(3+),Tm^(3+))and Li^(+),Bi^(3+)ions doped GdCa_(4)O(BO_(3))_(3) crystals were grown using the Czochralski pulling method.The second-harmonic-generation conversion efficiencies of the GdCOB:Yb an...The rare-earth ions(Yb^(3+),Tm^(3+))and Li^(+),Bi^(3+)ions doped GdCa_(4)O(BO_(3))_(3) crystals were grown using the Czochralski pulling method.The second-harmonic-generation conversion efficiencies of the GdCOB:Yb and GdCOB:Tm crystals are 31.3%and 33.3%,respectively,while the undoped GdCOB crystal is 27.9%.The conversion efficiencies of Yb^(3+),Tm^(3+)doped GdCOB are improved by 12%and 19%,respectively,compared to that of the undoped one.The conversion efficiencies of Li^(+),Bi^(3+)doped GdCOB crystals are 33%and 38.3%,which are improved by 15%and 37%as compared to that of the undoped crystal.The results are discussed using the anion group theory.展开更多
Second harmonic generation conversion efficiencies of Nd:YCOB and Nd:GdCOB were measured,the effective nonlinear coefficient(de_(ff))for both crystals at different phase-matching angles were estimated by comparison wi...Second harmonic generation conversion efficiencies of Nd:YCOB and Nd:GdCOB were measured,the effective nonlinear coefficient(de_(ff))for both crystals at different phase-matching angles were estimated by comparison with a KTP crystal.The self-frequency doubling laser performance c£these crystals were theoretically calculated by using these rfeff values and slope efficiency of the fundamental wave and lasing threshold.The results coincide very well.展开更多
基金Supported by the National Advanced Materials Commit tee of the"863 Program"under Grant No.863-715-001-0030.
文摘Continuous-wave radiation of 5W at 532 nm was produced with an Nd:YVO_(4)/KTP intracavity&equency-doubled laser end-pumped by a diode-laser-array at pump power of 17.2 W,giving optical conversion efRciency of 29.1%.The output power stability was measured to be better than 1.5%in short term operation.The pump-induced thermal lensing was also measured,showing good agreement with the performance of the laser.
基金Supported by the Key Program of the National Natural Science Foundation of China under Grant No.69890235the Key Program of Science and Technology Research of the Minis try of Education of China under Grant No.99182.
文摘The nonlinear-optical coefficients of RCOB(R=Gd,Y)crystals are measured.The spatial distribution of deff effective nonlinear-optical coefficient is determined subsequently.Our experiments show that the maximum deff occurs at the second quadrant.The second-harmonic-generation efficiency reaches 48%for a 6 mm-long,(113.2°,47.4°)-cut GdCOB,and 41.5%for a 5mm-long,(113°,36.5°)-cut YCOB,respectively.The intracavity frequency doubling of GdCOB is reported for the first time.
文摘A special prism coupling technique with the KBe_(2)BO_(3)F_(2) crystal is adopted to produce deep ultraviolet light including the fourth harmonic from an Nd:YAG laser,for which a conversion efficiency as high as 10%has been obtained.
基金Supported by the National Natural Science Foundation of China under Grant No.69890235.
文摘Large sized and optical quality GdCa_(4)O(BO_(3))_(3)(GdCOB)crystal with calcium partially substituted by strontium(Sr)ions was grown for the first time.The x-ray powder diffraction shows that the Sr ion has an effect on the cell parameters of the GdCOB crystal Second-harmonic generation(SHG)experiments were performed on the Sr:GdCOB and GdCOB crystals along the spatial phase-matching direction.The results show that the cw green laser output power is 1.04 W when the laser diode pump power is 10 W in the Nd:YVO_(4)/Sr:GdCOB intracavity laser.Considering the slope efficiency of Nd:YVO_(4) and the fundamental laser in cavity,the intracavity SHG conversion efficiency of the GdCOB crystal is 21%while it is 24%for the Sr:GdCOB crystal,the SHG conversion efficiency is improved by 14%.The effect of the Sr ions on the nonlinearity of the GdCOB crystal is also discussed by using the anion group theory.
基金Supported by the National Advanced Materials Commit tee of the“863 Program”(863-715-001-00).
文摘We have demonstrated a diode-pumped Nd:YVO4 laser that produced 273mW cw output at 671 nm by using KTP intracavity doubling.The optical-optical efficiency of the all-solid-state red laser was 5.1%.The maximum output power of the fundamental wave at 1342nm from Nd:YVO_(4) was 2.3W with slope-efficiency of 43%.
基金Supported by the National Natural Science Foundation of China under Grant No.69890235the Research Fund for the Doctoral Program of Higher Education of China.
文摘The rare-earth ions(Yb^(3+),Tm^(3+))and Li^(+),Bi^(3+)ions doped GdCa_(4)O(BO_(3))_(3) crystals were grown using the Czochralski pulling method.The second-harmonic-generation conversion efficiencies of the GdCOB:Yb and GdCOB:Tm crystals are 31.3%and 33.3%,respectively,while the undoped GdCOB crystal is 27.9%.The conversion efficiencies of Yb^(3+),Tm^(3+)doped GdCOB are improved by 12%and 19%,respectively,compared to that of the undoped one.The conversion efficiencies of Li^(+),Bi^(3+)doped GdCOB crystals are 33%and 38.3%,which are improved by 15%and 37%as compared to that of the undoped crystal.The results are discussed using the anion group theory.
基金Supported by the National Natural Science Foundation of China under Grant No.68890235.
文摘Second harmonic generation conversion efficiencies of Nd:YCOB and Nd:GdCOB were measured,the effective nonlinear coefficient(de_(ff))for both crystals at different phase-matching angles were estimated by comparison with a KTP crystal.The self-frequency doubling laser performance c£these crystals were theoretically calculated by using these rfeff values and slope efficiency of the fundamental wave and lasing threshold.The results coincide very well.
