Real-time optical OFDM transmissions with spectral efficiency up to 6.93 bit/s/Hz over 50 km SSMF IMDD systems

详细信息    查看全文

• 作者：Qianwu Zhang ; ^{zhangqianwu@shu.edu.cn} ; Min Liu ; Jian Chen ; Han Dun ; Junjie Zhang ; Yingchun Li ; Yingxiong Song ; Min Wang
• 关键词：Real-time ; OFDM ; Spectral efficiency ; IMDD
• 刊名：Optics Communications
• 出版年：2017
• 出版时间：15 March 2017
• 年：2017
• 卷：387
• 期：Complete
• 页码：12-17
• 全文大小：1092 K
• 卷排序：387

文摘

Real-time end-to-end OOFDM transmissions over 50 km SSMF IMDD systems with adaptively modulated up to 512-QAM modulation format without oversampling or inline amplifier are experimentally demonstrated, by utilizing low-cost transceiver components including directly modulated DFB Lasers and DACs/ADCs operating at sampling rate as low as 2GS/s. Moreover, the system performance robustness is also extensively explored to determine the system tolerance to DAC/ADC resolution mismatch. It is shown that aggregate system capacity can be maintained almost constant for DAC/ADC resolution mismatch as large as 3bits due to the utilization of adaptive bits and power loading. On the other hand, for a certain signal line rate, reference minimum DAC/ADC boundary in practical is also given which is important in cost effective application area.