Sektion Physik der Universitat Munchen and Max-Planck-Institut fur Quantenoptik 85748 Garching, Fed. Rep. of Germany

Shanghai Institute of Optics and Fine Mechonics, National Laboratory on High Power Laser and Physics, Shonghai 201800, China

T. D. Lee Physics Laboratory, Department of Physics 11, Fudan University, Shanghai 200433, China

State Key Joint Laboratory for Materials Modification by Laser, Ion and Electron Beams, Fudan University Branch Laboratory of Opfics & Laser Physics, Fudan University, Shanghai 200433, China

Joint Laboratory for Quantum Optics, Shanghai Institute of Optics & Fine Mechanics, Shanghai 201800, China

Institufe of Quantum Electronics, South China Normal University, Guangzhou 510631, China

¹ Laser Institute of Huazhong University of Science & Technology, Wuhan 430074, China

² Industrial Lasers R & D Center, Shatura, Moscow Region, 140700, Russia

¹ Department of Physics, Hangzhou University, Hangzhou 310028, China

² Complutense University of Madrid, Department of Optics, Faculfy of Physics, Ciudad Universitaria s/n.28040 Madrid, Spain

¹ Electronic Engineering Department, Jilin University of Technology, Changchun 130025, China

² Chongcbon Institute of Optics and Fine Mechanics Academia Sinica State Key Laboratory of Applied Optics P. O. Box 1024, Changchun 13002, China

³ Changchun Institute of Physics, Academia Sinica, Changchun 130021, China

Department of Precision Instruments Tsinghua University, Beijing 100084, China