1. National Institute for Laser, Plasma and Radiation Physic, Laser Department, 409 Atomistilor Street, PO Box MG-36, 077125 Magurele, RomaniabUniversity Politehnica of Bucharest, Faculty of Applied Sciences, Physics Department, 313 Splaiul Independentei, Bu
2. National Institute for Laser, Plasma and Radiation Physic, Laser Department, 409 Atomistilor Street, PO Box MG-36, 077125 Magurele, Romania