作者机构:Key Laboratory of Optical Communication and Lightwavc Technologies, Ministry of Education, Beijing University of Posts and Telecommunications, Beijing 100876, China
相关基金:This work was supported by the Hi-Tech Research and Development Program of China (2006AA01Z246), the Program for Changjiang Scholars and Innovative Research Team in University, MOE, (IRT0609), the Teaching and Scientific Research Foundation for the Returned Overseas Chinese Scholars, and the Innovative Foundation for BUPT graduate students.