掺杂比对Hg1－xCdxGa2S4晶体频率转换的影响

在相位匹配和可接受掺杂比理论的基础上,针对Cd掺杂的不同相Hg1－xCdxGa2S4晶体,研究了掺杂比对频率转换的影响.依据相应的Sellmeier方程得到了倍频和Nd3+∶YAG与Ho3+∶YLF激光器泵浦光学参量振荡的相位匹配调谐曲线,并给出了不同掺杂下的可接受掺杂比.结果表明:掺杂晶体可实现1~5 μm范围内非临界相位匹配的倍频和1~13 μm的参量光产生;随着掺杂比的增大,可接受掺杂比近似线性减小,并随着波长改变展现出不同变化趋势.

Influence of Composition Ratio on Frequency Conversion of Hg1-xCdxGa2S4

Based on the theories of phase matching and acceptable composition ratio,the influence of composition ratio on the frequency conversions of two kinds (phases) of Cd doped Hg1－xCdxGa2S4 was investigated.In consideration of corresponding sellmeier equations,phase matching diagrams of second harmonic generation and optical parametric oscillations pumped by the popular Nd3+∶YAG and Ho3+:∶YLF lasers were calculated,as well as acceptable composition ratios with various compositions.It is shown that second harmonic generation of noncritical phase matching can be realized in 1~5 μm and parametric light in 1~13 μm can be generated by optical parametric oscillations.Acceptable composition ratios decrease approximately in linearity with composition ratio,and show different tendencies with changing wavelengths.