Coherent control of high harmonic generation in a large-volume capillary for seeding of free-electron lasers

S.J. Goh, J. Reinink, Y. Tao, H.M.J. Bastiaens, P.J.M. van der Slot, S.G. Biedron, M.B. Danailov, S.V. Milton, J. Herek, K.-J. Boller

Research output: Contribution to conferencePosterOther research output

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Abstract

FEL-1 at FERMI@Elettra is a seeded free-electron laser using sub-harmonic seeding to generate soft x-rays down to 10 nm. The current seed laser, a standard solid-state laser followed by frequency quadrupling in nonlinear crystals, has a minimum wavelength of 200 nm. Injecting much shorter seed-laser wavelengths, for which high-harmonic generation (HHG) is of high promise, can shorten the laser output wavelength significantly. However, the minimum seed pulse energy required is not readily available with standard approaches to HHG. To increase the energy available in a particular harmonic for seeding, we use a gas-filled capillary with a large diameter (500 μm), pumped by an 8 mJ, 35 fs Ti:Sapphire laser. A wide capillary allows a large gas volume for HHG, thereby increasing the output energy. We also investigate the coherent control of HHG by shaping the spectral phase of the drive laser using an acousto-optic programmable dispersive filter. Here, we use a learning algorithm with the objective to simultaneously tune and selectively enhance an individual harmonic order. We present first results including pressure dependent harmonic output energy, spectrum and beam stability, as these are important for seeding of FELs. Further, we discuss initial experiments with coherent control that has shown selective enhancement up to a factor of 10.
Original languageEnglish
Number of pages1
Publication statusPublished - 11 Mar 2014
Event26th NNV-Symposium Plasma Physics & Radiation Technology 2014 - CongresHotel De Werelt, Lunteren, Netherlands
Duration: 11 Mar 201412 Mar 2014
Conference number: 26

Conference

Conference26th NNV-Symposium Plasma Physics & Radiation Technology 2014
CountryNetherlands
CityLunteren
Period11/03/1412/03/14

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inoculation
free electron lasers
harmonic generations
harmonics
seeds
lasers
wavelengths
output
acousto-optics
laser outputs
solid state lasers
gases
learning
energy
sapphire
energy spectra
filters
augmentation
pulses
crystals

Keywords

  • METIS-308827

Cite this

Goh, S. J., Reinink, J., Tao, Y., Bastiaens, H. M. J., van der Slot, P. J. M., Biedron, S. G., ... Boller, K-J. (2014). Coherent control of high harmonic generation in a large-volume capillary for seeding of free-electron lasers. Poster session presented at 26th NNV-Symposium Plasma Physics & Radiation Technology 2014, Lunteren, Netherlands.
Goh, S.J. ; Reinink, J. ; Tao, Y. ; Bastiaens, H.M.J. ; van der Slot, P.J.M. ; Biedron, S.G. ; Danailov, M.B. ; Milton, S.V. ; Herek, J. ; Boller, K.-J. / Coherent control of high harmonic generation in a large-volume capillary for seeding of free-electron lasers. Poster session presented at 26th NNV-Symposium Plasma Physics & Radiation Technology 2014, Lunteren, Netherlands.1 p.
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title = "Coherent control of high harmonic generation in a large-volume capillary for seeding of free-electron lasers",
abstract = "FEL-1 at FERMI@Elettra is a seeded free-electron laser using sub-harmonic seeding to generate soft x-rays down to 10 nm. The current seed laser, a standard solid-state laser followed by frequency quadrupling in nonlinear crystals, has a minimum wavelength of 200 nm. Injecting much shorter seed-laser wavelengths, for which high-harmonic generation (HHG) is of high promise, can shorten the laser output wavelength significantly. However, the minimum seed pulse energy required is not readily available with standard approaches to HHG. To increase the energy available in a particular harmonic for seeding, we use a gas-filled capillary with a large diameter (500 μm), pumped by an 8 mJ, 35 fs Ti:Sapphire laser. A wide capillary allows a large gas volume for HHG, thereby increasing the output energy. We also investigate the coherent control of HHG by shaping the spectral phase of the drive laser using an acousto-optic programmable dispersive filter. Here, we use a learning algorithm with the objective to simultaneously tune and selectively enhance an individual harmonic order. We present first results including pressure dependent harmonic output energy, spectrum and beam stability, as these are important for seeding of FELs. Further, we discuss initial experiments with coherent control that has shown selective enhancement up to a factor of 10.",
keywords = "METIS-308827",
author = "S.J. Goh and J. Reinink and Y. Tao and H.M.J. Bastiaens and {van der Slot}, P.J.M. and S.G. Biedron and M.B. Danailov and S.V. Milton and J. Herek and K.-J. Boller",
year = "2014",
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language = "English",
note = "26th NNV-Symposium Plasma Physics & Radiation Technology 2014 ; Conference date: 11-03-2014 Through 12-03-2014",

}

Goh, SJ, Reinink, J, Tao, Y, Bastiaens, HMJ, van der Slot, PJM, Biedron, SG, Danailov, MB, Milton, SV, Herek, J & Boller, K-J 2014, 'Coherent control of high harmonic generation in a large-volume capillary for seeding of free-electron lasers' 26th NNV-Symposium Plasma Physics & Radiation Technology 2014, Lunteren, Netherlands, 11/03/14 - 12/03/14, .

Coherent control of high harmonic generation in a large-volume capillary for seeding of free-electron lasers. / Goh, S.J.; Reinink, J.; Tao, Y.; Bastiaens, H.M.J.; van der Slot, P.J.M.; Biedron, S.G.; Danailov, M.B.; Milton, S.V.; Herek, J.; Boller, K.-J.

2014. Poster session presented at 26th NNV-Symposium Plasma Physics & Radiation Technology 2014, Lunteren, Netherlands.

Research output: Contribution to conferencePosterOther research output

TY - CONF

T1 - Coherent control of high harmonic generation in a large-volume capillary for seeding of free-electron lasers

AU - Goh, S.J.

AU - Reinink, J.

AU - Tao, Y.

AU - Bastiaens, H.M.J.

AU - van der Slot, P.J.M.

AU - Biedron, S.G.

AU - Danailov, M.B.

AU - Milton, S.V.

AU - Herek, J.

AU - Boller, K.-J.

PY - 2014/3/11

Y1 - 2014/3/11

N2 - FEL-1 at FERMI@Elettra is a seeded free-electron laser using sub-harmonic seeding to generate soft x-rays down to 10 nm. The current seed laser, a standard solid-state laser followed by frequency quadrupling in nonlinear crystals, has a minimum wavelength of 200 nm. Injecting much shorter seed-laser wavelengths, for which high-harmonic generation (HHG) is of high promise, can shorten the laser output wavelength significantly. However, the minimum seed pulse energy required is not readily available with standard approaches to HHG. To increase the energy available in a particular harmonic for seeding, we use a gas-filled capillary with a large diameter (500 μm), pumped by an 8 mJ, 35 fs Ti:Sapphire laser. A wide capillary allows a large gas volume for HHG, thereby increasing the output energy. We also investigate the coherent control of HHG by shaping the spectral phase of the drive laser using an acousto-optic programmable dispersive filter. Here, we use a learning algorithm with the objective to simultaneously tune and selectively enhance an individual harmonic order. We present first results including pressure dependent harmonic output energy, spectrum and beam stability, as these are important for seeding of FELs. Further, we discuss initial experiments with coherent control that has shown selective enhancement up to a factor of 10.

AB - FEL-1 at FERMI@Elettra is a seeded free-electron laser using sub-harmonic seeding to generate soft x-rays down to 10 nm. The current seed laser, a standard solid-state laser followed by frequency quadrupling in nonlinear crystals, has a minimum wavelength of 200 nm. Injecting much shorter seed-laser wavelengths, for which high-harmonic generation (HHG) is of high promise, can shorten the laser output wavelength significantly. However, the minimum seed pulse energy required is not readily available with standard approaches to HHG. To increase the energy available in a particular harmonic for seeding, we use a gas-filled capillary with a large diameter (500 μm), pumped by an 8 mJ, 35 fs Ti:Sapphire laser. A wide capillary allows a large gas volume for HHG, thereby increasing the output energy. We also investigate the coherent control of HHG by shaping the spectral phase of the drive laser using an acousto-optic programmable dispersive filter. Here, we use a learning algorithm with the objective to simultaneously tune and selectively enhance an individual harmonic order. We present first results including pressure dependent harmonic output energy, spectrum and beam stability, as these are important for seeding of FELs. Further, we discuss initial experiments with coherent control that has shown selective enhancement up to a factor of 10.

KW - METIS-308827

M3 - Poster

ER -

Goh SJ, Reinink J, Tao Y, Bastiaens HMJ, van der Slot PJM, Biedron SG et al. Coherent control of high harmonic generation in a large-volume capillary for seeding of free-electron lasers. 2014. Poster session presented at 26th NNV-Symposium Plasma Physics & Radiation Technology 2014, Lunteren, Netherlands.