11:15 - 11:30ID: 462
/ TOM14 S06: 1
TOM 14 Advances and Applications of Optics and Photonics
Sub-thermodynamic equilibrium surface roughness in hollow-core fibers for the ultraviolet range
Jonas H. Osório1, Foued Amrani1,2, Frédéric Delahaye1,2, Ali Dhaybi1, Kostiantyn Vasko1, Gilles Tessier3, Fabio Giovanardi4, Luca Vincetti4, Benoît Debord1,2, Frédéric Gérôme1,2, Fetah Benabid1,2
1XLIM Institute CNRS 7252, France; 2GLOphotonics; 3Institute de la Vision; 4University of Modena
We report on the development of new state-of-the-art ultralow-loss hollow-core fibers guiding in the short-wavelength range. The new record low attenuation values are as low as 50.0 dB/km at 290 nm, 9.7 dB/km at 369 nm, 5.0 dB/km at 480 nm, 0.9 dB/km at 558 nm, and 1.8 dB/km at 719 nm. Notably, the core roughness levels of the new state-of-the-art fibers are under the thermodynamic equilibrium limit set by the surface capillary waves scenario in amorphous silica.
11:30 - 11:45ID: 231
/ TOM14 S06: 2
TOM 14 Advances and Applications of Optics and Photonics
Poincare sphere of electromagnetic coherence
Jyrki Juhani Laatikainen1, Ari T. Friberg1, Olga Korotkova2, Tero Setälä1
1University of Eastern Finland, Finland; 2University of Miami, USA
We introduce a geometric representation that we call the Poincaré sphere of electromagnetic coherence. Our model intuitively illustrates the state of coherence and polarization of electromagnetic beams, and it is the first construction that displays optical coherence graphically.
11:45 - 12:00ID: 222
/ TOM14 S06: 3
TOM 14 Advances and Applications of Optics and Photonics
Sub-2 Cycle carrier-envelope-phase–stabilized 110W, 1.1mJ laser
Steffen Hädrich1, Maxim Tschernajew1, Evgeny Shestaev2, Fabian Stutzki1, Nico Walther1, Florian Just1, Florian Karl1, Sven Breitkopf1, Oliver Herrfurth1, Imre Seres3, Peter Jójárt3, Zoltán Várallyay3, Adám Börzsönyi3, Michael Müller2, Christian Grebing2, Dominik Hoff5, Gerhard Paulus6,7, Tino Eidam1, Jens Limpert1,2,4,6
1Active Fiber Systems GmbH, Germany; 2Institute of Applied Physics, Germany; 3ELI-ALPS, Hungary; 4Fraunhofer Institute for Applied Optics and Precision Engineering, Germany; 5Single Cycle Instruments, Germany; 6Helmholtz-Institute Jena, Germany; 7Institute of Optics and Quantum Electronics
We present a sub-2 cycle laser system combining high average power, pulse energy and repetition rate with CEP-stable operation. The system is based on an 8-channel fiber-based chirped pulse amplification system. The latter emits 300fs pulses, which are post-compressed down to the few-cycle regime in a two-stage multi-pass cell (MPC) nonlinear pulse compression. Furthermore, stabilization of the carrier-to-envelope phase is presented. This unique combination of high average power (110W), pulse energy (1.1mJ), pulse repetition rate (100kHz) and CEP stability makes this system an ideal driver for next generation attosecond sources.
12:00 - 12:15ID: 228
/ TOM14 S06: 4
TOM 14 Advances and Applications of Optics and Photonics
Continuous evolution of non-cyclic Pancharatnam-Berry phase in double-pinhole experiment
Aleksi Leinonen1, Antti Hannonen1, Henri Partanen2, Tommi K. Hakala1, Tero Setälä1, Ari T. Friberg1
1Institute of Photonics, University of Eastern Finland, Yliopistokatu 7, FI-80110 Joensuu, Finland; 2Dispelix Oy, Länsikatu 15, FI-80110 Joensuu, Finland
We demonstrate a way to measure a continuous evolution of non-cyclic Pancharatnam-Berry phase, using a modified Young’s double-pinhole arrangement, and derive an analytical expression for the phase by employing the geometry of the Poincaré sphere. The measurements and expression match the geodesic rule previously put forward and converge to the cyclic Pancharatnam-Berry phase after a full loop.
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