Submillimeter wave surface-emitting difference frequency generation in periodically poled lithium niobate waveguide
Submillimeter wave surface-emitting difference frequency generation in periodically poled lithium niobate waveguide
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周期性极化铌酸锂波导中亚毫米波面发射差频产生
DOI：
10.1109/icton.1999.781875
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
K. Kocharyan
中科院分区：
文献类型：
--
作者：
Y. Avetisyan;K. Kocharyan
从理论上研究了周期极化铌酸锂(LiNbO/SUB3/)(PPLN)光波导结构中的亚毫米波差频产生。结果表明，如果极化周期等于L=/spl//n/subg/(/spl lambda//n/subg/，其中/spl lambda/是亚毫米辐射波长，n/subg/是光群速度的平均折射率)，则PPLN波导能够在垂直于波导表面的方向上发射差频辐射。与光波不同，这种周期的PPLN光波导可以很容易地制作成亚毫米波DFG。
The submillimeter wave difference frequency generation (DFG) in periodically poled lithium niobate (LiNbO/sub 3/) (PPLN) waveguide structure is considered theoretically. It is shown that the PPLN waveguide is capable of emitting difference frequency radiation in direction normal to the surface of a waveguide if the poling period is equal to L=/spl lambda//n/sub g/ (/spl lambda/ is a wavelength of submillimeter radiation and n/sub g/ is a mean refractive index of the optical group velocity). In contrast to the optical waves, the PPLN waveguide with such period can be easily fabricated for the submillimeter wave DFG.