2μm OPO laser based on KTA
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摘要: 为了研究如何产生2μm 激光,提出将KTA晶体用于光参变振荡来产生2μm 激光的方法,通过对比KTA与KTP晶体的非线性性能,从理论上论证了该方法的可行性;并从光学频率变换所遵循的能量守恒与动量守恒出发,利用KTA晶体的Sellmeier方程、根据折射率椭球方程计算出了晶体的切割角度,绘制出了角度调谐和波长的关系曲线图;比较了两种切割方式下的晶体有效非线性系数的大小,通过比较,得出φ=0°,θ=48.37°切割的晶体具有更好的非线性特性的结论;并对该晶体的走离角、允许角、可接受带宽进行了计算,解决了KTA-OPO设计的最基本问题,为下一步的试验工作开展打下了基础.Abstract: In order to generate 2μm laser,a novel method was presented with kalium titanyl arsenate(KTA) as a nonlinear crystal in optical parametric oscillators.It was proved feasible by comparing the nonlinear parameters between KTA and KTP crystal.The graph of the relationship between the wavelength and the tunable-angle was drawn based on Sellmeier equation and refractive index ellipsoid of KTA.After compareson it was found that the crystal has better nonlinear characteristic at cut angles of φ=0°,θ=48.37°.Then the walk-off angle,acceptance angle and bandwidth were calculated.The basic problems on the design of KTA-OPO were solved and the study foundation was built up for the future experiments.
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Keywords:
- nonlinear optics /
- optical parametric oscillator(OPO) /
- 2μm laser /
- KTA crystal
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[1] JOHNSON L F,GEUSIC J E,van UITERT L G.Coherent oscillation from Tm3+,Ho3+,Yb3+ and Er3+ ions in yttrium aluminum garnet[J].A P L,1965,7(5):127～129.
[2] KIELECK C,HIRTH A.Investigations of a Q-switched Ho:YAG laserintracavity-pumped by a diode-pumped Tm:YLF laser[J].Proc SPIE,2004,5460:56～63.
[3] WANG Y Zh,YAO B Q,JU Y L et al.1W～2W ZnGeP2 optical parametric oscillator[J].High Power Laser and Particle Beam,2005,17(S1):163～166(in Chinese).
[4] YAO B Q,HE W J,LI Y F et al.Technical study of ZnGeP2 optical parametric oscillator pumped by a 2μm Tm,Ho:YLF laser[J].Chinese Journal of Laser,2005,32(1):39～42(in Chinese).
[5] BEACH R I,SUTTON S B,HONEA E C et al.High power 2μm diode pumped Tm:YAG laser[J].SPIE,1996,2698:168～171.
[6] WANG K Q,HAN L,WANG J J et al.LD pumped intro-cavity OPO high repetition frequency 2μm laser[J].High Power Laser and Particle Beam,2005,17(S1):185～188(in Chinese).
[7] WEI J Q,WANG J Y,LIU Y G.The study about growth and character of KTiOAsO4 crystal[J].Artificial Crystal,1994,23(2):95～101(in Chinese).
[8] MARK S W,PETER F M,JEFFREY J K.High-average-power KTiOAsO4 optical parametric oscillator[J].Opt Lett,1998,23(15):1161～1163.
[9] BOSENBERG W R,DEAN R.Broadly tunable single-frequency optical parametric frequency-conversion system[J].J O S A,1993,10(9):1716～1722.
[10] YAO B Q,WANG Y Zh,WANG Q.Development of mid-infared optical parametric oscillator[J].Laser Technology,2002,26(3):217～220(in Chinese).
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