@conference{
author = "Ilić, Jelena and Srećković, Milesa and Zarubica, Veljko",
year = "2008",
abstract = "Materials suitable for light pulse propagation control are investigated in this paper. Many of recent papers reported the results of optical properties measurement in broad wavelength ranges for newly developed materials as well as thin films of more or less known materials [1] [2]. After the refractive indices are measured for set of wavelengths they are fitted usually by four-parameter Sellmeier equation, on the basis of which the phase matching curves for second-harmonic generation are calculated. In this paper further analyses of Sellmeier equation for various materials of interest in nonlinear optics are performed.
First, group velocity dispersions are calculated and wavelength regions of specific types of pulse propagation are distincted: regions of constant pulse width around the zero group velocity dispersion, regions of pulse compression possibilities with negative group velocity dispersion and regions of pulse broadening which though usually unwanted can be used for introducing a good quality chirp suitable fore effective pulse compression [3]. Temperature dependences of refractive indices also reported are taken into account [4] [5].
On the other hand, generalized Sellmeier equation which consists of several oscillator terms involve in its parameters more direct information about material such as electronic transitions or resonance wavelengths and average oscillator strengths i.e. oscillators volume concentrations and transition probabilities [6]. Therefore, four parameter Sellmeier equations are transformed by fitting into one-term (or one-oscillator) in order to get more useful information about a material. The necessity of second term introduction indicated by bad fitting are detected for some materials. The conditions for the second term parameters required for negative group velocity dispersion (as it is appropriate in pulse compression) are determined. Finally, correlation of the parameters of Sellmeier equation and some non-optical material properties, including mechanical and thermal, are considered.
The materials chosen for the analyses are rare earth oxides, borates, chalcopyrite crystals some laser host materials and some crystals such as langasite, langanite and langataite [7].
References
[1] N. Umemura, K. Miyata and K. Kato, 30, 532 (2007).
[2] C. Martinet, A. Pillonnet, J. Lancok and C. Garapon, J. Luminescence 126, 807 (2007).
[3] G. Hays, E. Gaul, M. Martinez and Todd Ditmire, Appl. Opt. 46, 4813 (2007).
[4] U. Schlarb, K. Betzler, Phys.Rev. B 50, 751 (1994).
[5] L. F. Jiang, W. Z. Shen, H. Ogawa, Q. X. Guo, J. Appl. Phys. 94, 5704 (2004).
[6] X. Wan, H. Chan, C. Choy, X. Zhao, H. Luo, J. Appl. Opt. 96, 1387 (2004).
[7] J. Stade, L. Bohaty, M. Hengst, R. B. Heimann, Cryst. Res. Technol. 37, 1113 (2002).",
publisher = "Vinča Institute of Nuclear Sciences",
journal = "CEWQO 2008 Book of Abstracts",
title = "Sellmeier parameters analysis in optical pulse shaping",
pages = "36-35",
url = "https://hdl.handle.net/21.15107/rcub_machinery_6738"
}