摘要
In this letter, we experimentally demonstrated a high level quadrature amplitude modulation (QAM) optical orthogonal frequency division multiplexing (OFDM) transmission system utilizing a cost-effective directly modulated laser. This experiment was enabled by intrasymbol frequency-domain averaging-based channel estimation, large fast Fourier transform size to enhance the resistance of intersymbol interference, and the discrete Fourier transform-spread technique to reduce peak-to-average power ratio. A 31.7-Gbit/s 2048QAM OFDM signal can be successfully transmitted over 20-km large effective area fiber under a 20% soft-decision forward-error-correction threshold (bit error rate of 2.4 × 10-2.
| 源语言 | 英语 |
|---|---|
| 文章编号 | 6758346 |
| 页(从-至) | 941-944 |
| 页数 | 4 |
| 期刊 | IEEE Photonics Technology Letters |
| 卷 | 26 |
| 期 | 9 |
| DOI | |
| 出版状态 | 已出版 - 1 5月 2014 |
| 已对外发布 | 是 |
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