Mode tailoring in a ridge-type periodically poled lithium niobate waveguide.

Mode tailoring in a ridge-type periodically poled lithium niobate waveguide.
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脊型周期性极化铌酸锂波导中的模式剪裁。

DOI:
10.1364/oe.18.007678
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发表时间:
2010
期刊:
影响因子:
3.8
通讯作者:
D. Ko
D. Ko
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Y. Lee;W. Shin;B. Yu;C. Jung;Y. Noh;D. Ko

文献摘要

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我们提出了一种简单而强大的方法,通过使用二阶非线性效应和局部温度控制技术,在脊型周期性极化铌酸锂(PPLN)波导中进行模式生成和转换。我们证明,通过调节基波的波长或波导的温度,可以通过 PPLN 波导中的准相位匹配(QPM)非线性过程选择性地生成厄米高斯(HG)模波(HG(00)至 HG(22)之间)。此外,还证明了通过使用局部温度控制技术在单个 PPLN 波导中同时生成的 HG 模式的组合,可以将 HG 模式转换为拉盖尔高斯(LG)模式。
We present a simple and powerful method for mode generation and transformation in a ridge-type periodically poled lithium niobate (PPLN) waveguide by the use of second-order nonlinear effect and local-temperature-control technique. We show that a Hermite-Gaussian (HG) mode wave (among HG(00) to HG(22)) can be selectively generated via the quasi-phase-matching (QPM) nonlinear process in a PPLN waveguide by tuning the wavelength of fundamental wave or the temperature of the waveguide. As well, it is demonstrated that HG mode can be transformed into Laguerre-Gaussian (LG) one via combination of HG modes which are simultaneously generated in a single PPLN waveguide with local-temperature-control technique.