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Title: A table-top monochromator for tunable femtosecond XUV pulses generated in a semi-infinite gas cell: Experiment and simulations

Abstract

We present a new design of a time-preserving extreme-ultraviolet (XUV) monochromator using a semi-infinite gas cell as a source. The performance of this beamline in the photon-energy range of 20 eV–42 eV has been characterized. We have measured the order-dependent XUV pulse durations as well as the flux and the spectral contrast. XUV pulse durations of ≤40 fs using 32 fs, 800 nm driving pulses were measured on the target. The spectral contrast was better than 100 over the entire energy range. A simple model based on the strong-field approximation is presented to estimate different contributions to the measured XUV pulse duration. On-axis phase-matching calculations are used to rationalize the variation of the photon flux with pressure and intensity.

Authors:
; ;  [1]
  1. Laboratorium für Physikalische Chemie, ETH Zürich, Vladimir-Prelog-Weg 2, CH-8093 Zürich (Switzerland)
Publication Date:
OSTI Identifier:
22597875
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 87; Journal Issue: 7; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; APPROXIMATIONS; COMPUTERIZED SIMULATION; EV RANGE; EXTREME ULTRAVIOLET RADIATION; MONOCHROMATORS; PERFORMANCE; PHOTONS; PULSES

Citation Formats

Conta, A. von, Huppert, M., and Wörner, H. J.. A table-top monochromator for tunable femtosecond XUV pulses generated in a semi-infinite gas cell: Experiment and simulations. United States: N. p., 2016. Web. doi:10.1063/1.4955263.
Conta, A. von, Huppert, M., & Wörner, H. J.. A table-top monochromator for tunable femtosecond XUV pulses generated in a semi-infinite gas cell: Experiment and simulations. United States. doi:10.1063/1.4955263.
Conta, A. von, Huppert, M., and Wörner, H. J.. 2016. "A table-top monochromator for tunable femtosecond XUV pulses generated in a semi-infinite gas cell: Experiment and simulations". United States. doi:10.1063/1.4955263.
@article{osti_22597875,
title = {A table-top monochromator for tunable femtosecond XUV pulses generated in a semi-infinite gas cell: Experiment and simulations},
author = {Conta, A. von and Huppert, M. and Wörner, H. J.},
abstractNote = {We present a new design of a time-preserving extreme-ultraviolet (XUV) monochromator using a semi-infinite gas cell as a source. The performance of this beamline in the photon-energy range of 20 eV–42 eV has been characterized. We have measured the order-dependent XUV pulse durations as well as the flux and the spectral contrast. XUV pulse durations of ≤40 fs using 32 fs, 800 nm driving pulses were measured on the target. The spectral contrast was better than 100 over the entire energy range. A simple model based on the strong-field approximation is presented to estimate different contributions to the measured XUV pulse duration. On-axis phase-matching calculations are used to rationalize the variation of the photon flux with pressure and intensity.},
doi = {10.1063/1.4955263},
journal = {Review of Scientific Instruments},
number = 7,
volume = 87,
place = {United States},
year = 2016,
month = 7
}
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  • A detailed description of the design and operational characteristics of a regeneratively initiated, self-mode-locked Cr:forsterite laser pumped by a continuous-wave Nd:YAG laser is given. Without compensating for the intracavity positive group velocity dispersion, regenerative acoustooptic modulation produced pulses of between 41 and 6.5 ps (FWHM) at 1.23 [mu]m with average output powers of between 280 and 380 mW, respectively. Using intracavity negative group-velocity-dispersion compensation, nearly transform-limited femtosecond pulses of 48 fs (FWHM) duration were generated with average TEM[sub 00] output powers of 380 mW at 1.23 [mu]m. By tuning the output of the mode-locked laser from 1.211 to 1.264 [mu]m,more » the dispersion (second and third order) of the Cr:forsterite gain medium has been measured. The operational wavelength range of the laser was extended to the visible region from 605 to 635 nm by external frequency doubling in a LiIO[sub 3] nonlinear crystal. With approximately 250 mW of fundamental pump power at 1.23 [mu]m, red pulses of 116 fs (FWHM) duration at 615 nm were obtained with conversion efficiencies approaching 10 percent.« less
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  • We demonstrate the feasibility of the compression of tunable pulses by means of sum-frequency generation under special group-velocity mismatch conditions. {beta}-Barium borate crystal has been shown to support the upconversion process, resulting in 160-fs pulses tunable within 600{endash}720 nm when mixing with 1.3-ps 1055-nm pulses from a Nd:glass laser with 0.95-ps pulses tunable within 1400{endash}2200 nm from a traveling-wave parametric generator. A similar compression of {approximately}150-fs Ti:sapphire pulses predicted for the sum-frequency tuning range of 520{endash}590 nm. {copyright} {ital 1996 Optical Society of America.}