论文标题
时空波数据包的超紧凑型合成
Ultra-compact synthesis of space-time wave packets
论文作者
论文摘要
时空波数据包（STWP）是脉冲场，其中空间频率和时间频率之间严格规定的关联产生令人惊讶和有用的行为。但是，迄今为止使用笨重的自由空间光学系统合成了STWP，这些光学系统需要精确比对。我们描述了使用新型光学组件的紧凑型系统：相对于平行平行的设备方面的旋转45度的the鼠bragg光栅。凭借这种光栅的独特结构，级联的光栅可以解决并重新组合光谱，而无需自由空间传播或准确。我们通过放置一个相板来产生STWP，该相位板在空间上调节此类级联的光栅之间的分辨光谱，设备体积为25x25x8 mm3，该设备体积比以前的布置小。
Space-time wave packets (STWPs) are pulsed fields in which a strictly prescribed association between the spatial and temporal frequencies yields surprising and useful behavior. However, STWPs to date have been synthesized using bulky free-space optical systems that require precise alignment. We describe a compact system that makes use of a novel optical component: a chirped volume Bragg grating that is rotated by 45 degrees with respect to the plane-parallel device facets. By virtue of this grating's unique structure, cascaded gratings resolve and recombine the spectrum without free-space propagation or collimation. We produce STWPs by placing a phase plate that spatially modulates the resolved spectrum between such cascaded gratings, with a device volume of 25x25x8 mm3, which is orders of magnitude smaller than previous arrangements.
