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Université de Fribourg

Graines cauris et tabliers : Diversité, origine et traditions dans les jeux de semailles

Retschitzki, Jean

In: Jeux de l'humanité. 5000 ans d'histoire culturelle des jeux de société, 2007, p. 42-49

Haute Ecole pédagogique Fribourg

Eigenmotivation, Neugier und Interesse fördern

Gerteis, Markus

In: 4 bis 8 – Fachzeitschrift für Kindergarten und Unterstufe, 2003, no. 9, p. 5-7

Université de Neuchâtel

Characterizing the carrier-envelope offset in an optical frequency comb without traditional f-to-2f interferometry

Brochard, Pierre ; Schilt, Stéphane ; Wittwer, Valentin J ; Südmeyer, Thomas

In: Optics Letters, 2015, vol. 40, no. 23, p. 5522-5525

We present a new method to measure the frequency noise and modulation response of the carrier-envelope offset (CEO) beat of an optical frequency comb that does not make use of the traditional f-to-2f interferometry. Instead, we use an appropriate combination of different signals to extract the contribution of the CEO frequency without directly detecting it. We present a...

Université de Fribourg

Der Verfassungseid und die Verfassung der Eide

In: Verfassungsidee und Verfassungspolitik, 2015, p. 373-378

Université de Fribourg

Visualization of polymer deformation using microcapsules filled with charge-transfer complex precursors

Lavrenova, Anna ; Farkas Jacob ; Weder, Christoph ; Simon, Yoan C.

In: ACS Appl. Mater. Interfaces, 2015, vol. 7, no. 39, p. 21828–21834

The visualization of polymer deformation using microcapsules filled with charge-transfer complex precursors is reported. Poly(urea-formaldehyde) microcapsules filled with toluene and either hexamethylbenzene as donor or chloranil as acceptor were prepared by in situ polymerization of an oil-in-water emulsion. The resulting microcapsules were incorporated in a poly(dimethylsiloxane) matrix by...

Université de Neuchâtel

Green-diode-pumped femtosecond Ti:Sapphire laser with up to 450 mW average power

Gürel, Kutan ; Wittwer, Valentin J ; Hoffmann, Martin ; Saraceno, Clara J ; Hakobyan, Sargis ; Resan, B ; Rohrbacher, A ; Weingarten, K ; Schilt, Stéphane ; Südmeyer, Thomas

In: Optics Express, 2015, vol. 23, no. 23, p. 30043-30048

We investigate power-scaling of green-diode-pumped Ti:Sapphire lasers in continuous-wave (CW) and mode-locked operation. In a first configuration with a total pump power of up to 2 W incident onto the crystal, we achieved a CW power of up to 440 mW and self-starting mode-locking with up to 200 mW average power in 68-fs pulses using semiconductor saturable absorber mirror (SESAM) as saturable...