[1] Russian Acad Sci, Fiber Opt Res Ctr, Laser Phys, Moscow 119333, Russia
[2] Russian Acad Sci, Fiber Opt Res Ctr, AM Prokhorov Gen Phys Inst, Moscow 119333, Russia
[3] Russian Acad Sci, Fiber Opt Res Ctr, AM Prokhorov Gen Phys Inst, Laser Phys, Moscow 119333, Russia
[4] Russian Acad Sci, Fiber Opt Res Ctr, Moscow 119333, Russia