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Kvantovaya Elektronika, 2014, Volume 44, Number 5, Pages 431–439 (Mi qe15923)  

This article is cited in 11 scientific papers (total in 11 papers)

Lasers

Ti:sapphire/KrF hybrid laser system generating trains of subterawatt subpicosecond UV pulses

V. D. Zvorykin, A. A. Ionin, A. O. Levchenko, G. A. Mesyats, L. V. Seleznev, D. V. Sinitsyn, N. N. Ustinovskii, A. V. Shutov

P. N. Lebedev Physical Institute, Russian Academy of Sciences, Moscow
References:
Abstract: The GARPUN-MTW Ti:sapphire/KrF hybrid laser system is used to investigate different multipass schemes for amplifying trains of ultrashort pulses (USPs) of subpicosecond duration. It is shown that, for an USP repetition period of 3 – 5 ns, which exceeds the gain-medium recovery time (~2 ns), trains are amplified in the same way as single USPs. Due to this, a train can efficiently extract pump energy from the amplifier and sum energies of individual USPs. The energy of a four-USP train, extracted during four passes through the preamplifier and two passes through the final KrF amplifier (4 + 2 scheme), is saturated at a level of 1.6 J and corresponds to maximum USP peak powers of about 0.6 TW. The energy of amplified spontaneous emission (ASE), on the contrary, rapidly increases at a large total gain length Leff ≈ 6 m and is approximately equal to the USP energy. In the (4 + 1) and (2 + 2) schemes the USP energy decreases only slightly, to Eout = 1.3 and 1.2 J, and the ASE fraction is reduced to about 10% and 3%, respectively. USP self-focusing leads to multiple laser beam filamentation and a 200-fold local increase in the radiation intensity in filaments, to ~2 × 1011 W cm-2, a level at which the nonlinear loss in the output CaF2 windows of the KrF amplifier, caused by three-photon absorption, nonlinear scattering, and broadening of the radiation spectrum to a value exceeding the gain band of the KrF laser transition, becomes the main factor determining the saturation of the USP output energy.
Keywords: amplification of subpicosecond subterawatt pulses in KrF amplifiers, multipass amplification schemes, nonlinear loss in amplifier windows.
Received: 03.03.2014
English version:
Quantum Electronics, 2014, Volume 44, Issue 5, Pages 431–439
DOI: https://doi.org/10.1070/QE2014v044n05ABEH015442
Bibliographic databases:
Document Type: Article
PACS: 42.55.Rz, 42.55.Lt, 42.60.By, 42.60.Jf, 42.65.Jx, 42.65.Re
Language: Russian


Citation: V. D. Zvorykin, A. A. Ionin, A. O. Levchenko, G. A. Mesyats, L. V. Seleznev, D. V. Sinitsyn, N. N. Ustinovskii, A. V. Shutov, “Ti:sapphire/KrF hybrid laser system generating trains of subterawatt subpicosecond UV pulses”, Kvantovaya Elektronika, 44:5 (2014), 431–439 [Quantum Electron., 44:5 (2014), 431–439]
Linking options:
  • https://www.mathnet.ru/eng/qe15923
  • https://www.mathnet.ru/eng/qe/v44/i5/p431
  • This publication is cited in the following 11 articles:
    Citing articles in Google Scholar: Russian citations, English citations
    Related articles in Google Scholar: Russian articles, English articles
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