State;
Key;
Laboratory;
on;
Integrated;
Optoelectronics,;
Tsinghua;
National;
Laboratory;
for;
Information;
Science;
and;
Technology;
(TNList),;
Department;
of;
Electronic;
Engineering,;
Tsinghua;
University,;
Beijing;
100084,;
China;
OFDM系统; 性能分析; 全光; 采样; 离散傅立叶变换; IDFT; 正交频分复用; 时间延迟;