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arXiv 1202.5580physics.optics
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用单个啁啾准相位匹配晶体产生有效的宽带和频与差频

Efficient broadband sum and difference frequency generation with a single chirped quasi-phase-matching crystal

Andon A. Rangelov

摘要:

我们提出了一种有效的宽带频率产生技术,用于两个共线光学参量过程$ω_3=ω_1+ω_2$和$ω_4=ω_1-ω_2$。它利用啁啾准相位匹配光栅,在非耗尽泵浦近似制度执行人口转移,这是类似于绝热人口转移在三态"V“量子系统。输入场的能量通过晶体中的局部调制周期,取决于两个相位匹配中哪一个首先发生,而被交替地转移到$ω_3$或$ω_4$场中。通过反转本地调制扫描的方向,可以在$ω_3$和$ω_4$之间切换输出,这对应于晶体旋转角度$π$

英文摘要:

We propose an efficient broadband frequency generation technique for two collinear optical parametric processes $ω_3=ω_1+ω_2$ and $ω_4=ω_1-ω_2$. It exploits chirped quasi-phase-matched gratings, which in the undepleted pump approximation regime perform population transfer that is analogous to adiabatic population transfer in a three-state ``vee'' quantum system. The energy of the input fields is transferred adiabatically either into $ω_3$ or $ω_4$ field, depending on which of the two phase matchings occurs first by the local modulation period in the crystal. One can switch the output between $ω_3$ and $ω_4$ by inverting the direction of the local modulation sweep, which corresponds to a rotation of the crystal by angle $π$

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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