论文标题
Y-Z切割氯锂纵向纵向压电共振光弹性调节器
Y-Z cut lithium niobate longitudinal piezoelectric resonant photoelastic modulator
论文作者
论文摘要
调节光束强度的能力具有科学和实际意义。在这项工作中，我们演示了具有创纪录的调制效率的Y-Z切割的niobate声学调节器，仅需要$ 1.5〜 \ text {w}/\ text {cm}^2 $在7 MHz时100％调制。这些调节器使用简单的制造过程；用透明的电极涂上薄锂晶片的顶部和底部表面。晶圆的基本剪切声模式通过透明电极激发，通过施加与该模式的谐振频率相对应的频率，将声波限制在电极区域。通过该区域传播的光的偏振在应用频率下进行调制。极化调制通过在极化器之间放置调制器将其转换为强度调制。为了展示此调制器的重要应用空间，我们将其与标准图像传感器集成在一起，并演示4百万像素的飞行时间成像
The capability to modulate the intensity of an optical beam has scientific and practical significance. In this work, we demonstrate Y-Z cut lithium niobate acousto-optic modulators with record-high modulation efficiency, requiring only $1.5~\text{W}/\text{cm}^2$ for 100% modulation at 7 MHz. These modulators use a simple fabrication process; coating the top and bottom surfaces of a thin lithium niobate wafer with transparent electrodes. The fundamental shear acoustic mode of the wafer is excited through the transparent electrodes by applying voltage with frequency corresponding to the resonant frequency of this mode, confining an acoustic standing wave to the electrode region. Polarization of light propagating through this region is modulated at the applied frequency. Polarization modulation is converted to intensity modulation by placing the modulator between polarizers. To showcase an important application space for this modulator, we integrate it with a standard image sensor and demonstrate 4 megapixel time-of-flight imaging
