"Integrated Magneto-Optical Devices for Microwave & Optical Signal Processing"

高容量单模光纤通信系统需要稳定的单模激光光源和光外差接收器。源和接收器的一个重要部件是光学频率转换器。该设备产生输入光信号的频移复制品。理想情况下，频移量应该是电子可控的。外差光学光谱学也需要频率转换器。PI最近利用与磁性石榴石薄膜中的微波静磁波的相互作用，展示了高达12 GHz的光学频移。使用这项技术，最高可达+20 GHz的频移应该是可能的。与电光和声光频率转换器相比的优势包括单边带频移、通过偏置磁场在1-20 GHz范围内连续的电子可调谐、可选择的上下频移以及与频率无关的输出光束角度。

Stable single mode laser sources and optical heterodyne receivers are needed for high capacity single-mode fiber communications systems. An important component for both sources and receivers is an optical frequency translator. This device yields a frequency-shifted replica of an input optical signal. Ideally the amount of the frequency shift should be electronically controllable. Frequency translators are also needed for heterodyne optical spectroscopy. The PI has recently demonstrated optical frequency shift of up to 12 GHz using interactions with microwave magnetostatic waves in magnetic garnet thin films. Shifts of up to + 20 GHz should be possible using this technique. Advantages over electro-optical and acousto-optical frequency translators include single-sideband frequency shifts, continuous electronic tunability over the range 1-20 GHz via a magnetic bias field, selectable up or down frequency shifts, and a frequency-independent output beam angle.