Broadband spectral characterization of the phase shift induced by population inversion in Ti:Sapphire

Roland S. Nagymihaly, Huabao Cao, Peter Jojart, Viktor Zuba, Roland Flender, Oleg Antipov, Imre Seres, Adam Borzsonyi, Vladimir Chvykov, K. Osvay, Mikhail Kalashnikov

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Abstract

The spectral phase shift of broadband amplified pulses, induced by population inversion, was measured in Ti:Sapphire at different pump fluence values. The measurement was performed for two orthogonal polarization directions and at two different crystal temperatures of 296 K and 30 K. Zero shifts and sign changes were observed in the spectral phase, which are connected to the gain spectrum of the crystal. The electronic refractive index changes were also numerically calculated by the Kramers-Kronig theory. The results are highly important for achieving sub-10 fs pulse duration and phase stability in the next generation of Ti:Sapphire-based laser systems.

Original languageEnglish
Pages (from-to)1226-1235
Number of pages10
JournalOptics Express
Volume27
Issue number2
DOIs
Publication statusPublished - Jan 21 2019

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ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Nagymihaly, R. S., Cao, H., Jojart, P., Zuba, V., Flender, R., Antipov, O., Seres, I., Borzsonyi, A., Chvykov, V., Osvay, K., & Kalashnikov, M. (2019). Broadband spectral characterization of the phase shift induced by population inversion in Ti:Sapphire. Optics Express, 27(2), 1226-1235. https://doi.org/10.1364/OE.27.001226