| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1535466 | Optics Communications | 2013 | 5 Pages |
Abstract
Pilot patterns are experimentally investigated to characterize the frequency/time dependence of the optical orthogonal frequency division multiplexing (OFDM) signal transmission. The optical signal performance is evaluated in terms of error vector magnitude (EVM). It is shown that, the quality of the OFDM signals can be improved up to 4Â dB in EVM, for 10Â Gb/s, 16-QAM-encoded OFDM signals after 20Â km single mode fiber (SMF) transmission with intensity-modulation and direct-detection (IMDD). The best performance is obtained by applying pilot tones for all subcarriers, which implies that the optical OFDM transmission is relatively quasi-static with respect to the subcarrier frequencies. The noise of the OFDM signals originated mainly from the amplitude/phase fluctuation of optical signal with time.
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Lilong Liu, Xuelin Yang, Weisheng Hu,