Division of Advanced Electronics and Optical Science, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan.
Opt Lett. 2011 Apr 15;36(8):1350-2. doi: 10.1364/OL.36.001350.
We propose and demonstrate an electro-optic (EO) multiplication of a frequency shift using 10 GHz order electrical signal. The principle is based on a successive Bragg diffraction from cascaded EO traveling phase gratings in a traveling wave EO phase modulator. We fabricate a shift frequency doubler using simple domain engineering processes in a LiTaO₃ crystal. Frequency shifting of ±32.5 GHz with an efficiency of 60% is demonstrated using a 16.25 GHz modulation signal.
我们提出并演示了一种使用 10GHz 量级电信号对频移进行电光（EO）倍增的方法。该原理基于在行波 EO 相位调制器中，通过级联电光行波相位光栅进行连续布拉格衍射。我们使用 LiTaO₃ 晶体中的简单畴工程工艺制作了一个倍频器。使用 16.25GHz 的调制信号，实现了±32.5GHz 的频移，效率为 60%。
