2D spectrum slicing for sequentially timed all-optical mapping photography with 25 frames

Abstract

Sequentially timed all-optical mapping photography (STAMP) is a promising technology for observing ultrafast phenomena. Increasing the frame number during one shot is critical to enhance the capability of STAMP, but the rearrangement of the frames significantly intensifies the complexity of the system. In this work, we design a spectrum-slicing method, allowing for the separation and arrangement of the frames simultaneously in a two-dimensional manner. The experimental results show that our system can capture 25 images in one shot with a spatial resolution of 2.46 μm and a frame rate of 2.5 Tfps, indicating its potential for the observation of highly dynamic events.

Design and Study of a Two-Dimensional (2D) All-Optical Spatial Mapping Module

“…This system has the advantages of fewer optical elements and a compact structure; however, the fabrication of diffractive optical elements was challenging and expensive, and lower energy utilization and poor consistency of 2D diffraction efficiency limit the further development of this system. Saiki et al used slicing mirrors instead of the periscope array for complete optical field control [19], which was then developed by Yuan et al [2,20,21]. This can effectively increase the frame and detector utilization of the instrument; however, there are problems, such as the high precision of the grating and the slice mirror and the existence of chromatic aberration that reduces the quality of imaging.…”