Abstract
By numerical simulations and analysis, we proposed a fiber with multi-hollow-core structure for optical pulse compression of high energy ultrashort laser pulses. In this scheme, different parts of a high-energy flat-top pulse are coupled into different hollow cores of such fiber and each of the cores functions as an independent traditional hollow-core fiber compressor. After the multi-hollow-core fiber, the output beams are collimated and compressed to few-cycle level. Then they can be focused to ultra-high intensity. This method can easily be scaled to compressing pulses of large beam size with high energy without limit in principle.
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