G. Schimmel, T. Produit, D. Mongin, J. Kasparian, and J.-P. Wolf, Optica 5, 1338 (2018) link
Abstract: Atmospheric clearness is a key issue for free space optical communications (FSO). We present an active method to achieve FSO through clouds and fog, using ultrashort high-intensity laser filaments. The laser filaments opto-mechanically expel the droplets out of the beam and create a cleared channel for transmitting high-bit-rate telecom data at 1.55 μm. The low energy required for the process allows considering applications to Earth–satellite FSO and secure ground-based optical communication, with classical or quantum protocols.
L. He, M. Azadifar, Q. Li, M. Rubinstein, V. A. Rakov, A. Mediano, D. Pavanello, M. Paolone, H. Xing and F. Rachidi
Joint IEEE EMC and Asia Pacific EMC Symposium, 14-17.052018, Singapore
A. Mostajabi, N. Pineda, D. Romero, M. Azadifar, O. Van der Velde,
J. Montanya, M. Rubinstein and F. Rachidi
Joint IEEE EMC and Asia Pacific EMC Symposium, Singapore, 14-17.05.2018
L. He, M. Azadifar, F. Rachidi, M. Rubinstein, V. A. Rakov, V. Cooray, D. Pavanello, H. Xing, Journal of Geophysical Research: Atmospheres (2018)
Interview of GAP Biophotonics leader Prof. Jean-Pierre Wolf on German TV ZDF “Lebensretter Technik” Link
A. Mostajabi, A. Smorgonskiy, F. Rachidi, M. Azadifar, M. Rubinstein, G. Diendorfer
25th International Lightning Detection Conference & 7th International Lightning Meteorology Conference, March 12-15 – Ft. Lauderdale, Florida, USA
The ZEISS Research Award promotes outstanding achievements in the field of optics. Jean-Pierre Wolf, Professor at the University of Geneva, will be honored for his groundbreaking application of ultra-short, ultra-intense laser pulses in researching the earth’s atmosphere. His research makes it possible to find out more about pollutants in the earth’s atmosphere and potentially control lightning and condensation in clouds.
The awards will be presented during the ZEISS Symposium “Optics in the Quantum World” on 18 April 2018 at the ZEISS Forum in Oberkochen
UNIGE team will organize the International Conference on Laser Filamentation, COFIL 2018, in Geneva on June 25- 29 2018. COFIL 2018 is the 7th of a very successful series of biennial conferences bringing together scientists working in the field of ultrashort and intense laser filamentation and its applications.
E. Schubert, D. Mongin, T. Produit, G. Schimmel, J. Kasparian and J.-P. Wolf, Applied Physics Letters 111, 211103 (2017) link
Abstract: We investigate the influence of ultrashort laser filaments on high-voltage discharges and spark-free unloading at various repetition rates and wind conditions. For electric fields well below, close to, and above the threshold for discharges, we observe remote spark-free unloading, discharge suppression, and discharge guiding, respectively. These effects rely on an indirect consequence of thermal deposition, namely, the fast dilution of ions by the shockwave triggered by the filament at each laser shot. This dilution drastically limits ion-ion recombination and increases the plasma channel conductivity that can still be non-negligible after tens or hundreds of milliseconds. As a result, the charge flow per pulse is higher at low repetition rates.