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13 September 2005 Evaluation of the Fourier transform limit of x-ray lasers
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Abstract
Evidence from experimental measurements of the temporal duration Δt of x-ray lasing and measurements or estimates of the frequency bandwidth Δν show that the Fourier transform limit ΔνΔt ~ 1 has been approached in several experiments. It is important to understand and quantify this fundamental limit. The temporal behaviour of x-ray laser pulses of short duration at the Fourier transform limit is examined in this paper. Using numerical methods to model ASE output, the behaviour of the electric field with time E(t) is determined from the Fourier transform of the electric field variation with frequency E(ν). The expected time-bandwidth product is then presented for different gain length products.
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P. Mistry, G. J. Tallents, and M. Kalal "Evaluation of the Fourier transform limit of x-ray lasers", Proc. SPIE 5919, Soft X-Ray Lasers and Applications VI, 59190B (13 September 2005); https://doi.org/10.1117/12.620622
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