Berlin 2014 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 30: Poster: Photonics, laser development and applications, ultrashort laser pulses, quantum effects

Q 30.19: Poster

Dienstag, 18. März 2014, 16:30–18:30, Spree-Palais

Supercontinuum generation in optical fibers: considerations about the spectral shape. — •Christoph Mahnke und Fedor Mitschke — Universität Rostock, Universitätsplatz 3, 18051 Rostock

In the process of supercontinuum generation in optical fibers the interplay of various nonlinear effects leads to a spectral broadening of the input field. Under certain conditions the resulting spectrum becomes independent from details of the field propagation and converges to a certain characteristic shape[1]. We observe a similar behavior in our experimental setup, where supercontinuum is generated by high-power picosecond laser pulses in a nonlinear microstructured fiber with two zero-dispersion wavelengths.

A recent theoretical approach endeavours to describe this observation by us and others through adaptation of the so called wave-turbulence theory from hydrodynamics [2-3]. This approach attempts to predict the characteristic spectral shape as dominated by the dispersion curve of the fiber. We will discuss whether this procedure can be applied to our experiment and compare experimental and numerical data to the predictions from the wave-turbulence theory.

[1] Martin-Lopez et al., Opt. Express 9, 6745 (2008)

[2] B. Barviau et al., Opt. Lett. 33, 2833 (2008)

[3] Kibler et al., Opt. Fiber Techn. 18, 257 (2012)

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