Acquiring sequentially time-resolved two-dimensional images with parallel multi-group sampling strategy

A method of acquiring sequentially time-resolved two-dimensional images with parallel multi-group sampling strategy has been developed. In this technique, the two-dimensional image was sampled and transferred by a fiber bundle, the fibers of which were arranged in two-dimensional arrays in the input end and rearranged in four one dimensional lines in the output end. The output four groups of one-dimensional images were parallelly detected by a streak camera. The recorded images of the streak camera were then reconstructed according to the spatial relationship of the fibers between the input and output ends to obtain sequentially time-resolved two-dimensional images. The fiber bundle was composed of 64 <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mo>×</mml:mo></mml:math> 64 pixels in the input end and four columns of 1 <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mo>×</mml:mo></mml:math> 1024 pixels in the output end. Each pixel consisted of 4 <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mo>×</mml:mo></mml:math> 4 fibers. The imaging system with about 10 ps temporal resolution has been applied for observing the flight of light, indicating that this technique can be a promising tool for investigating ultrafast phenomena.