Centralized Lightwave WDM-PON Employing 16-QAM Intensity Modulated OFDM Downstream and OOK Modulated Upstream Signals

被引：129

作者：

Yu, Jianjun ^{[1
]}

Huang, Ming-Fang ^{[1
,2
]}

Qian, Dayou ^{[1
]}

Chen, Lin ^{[3
]}

Chang, Gee-Kung ^{[2
]}

机构：

[1] NEC Labs Amer, Princeton, NJ 08540 USA

[2] Georgia Inst Technol, Sch Elect & Comp Engn, Atlanta, GA 30332 USA

[3] Hunan Univ, Sch Comp & Commun, Changsha 410082, Hunan, Peoples R China

来源：

IEEE PHOTONICS TECHNOLOGY LETTERS | 2008年 / 20卷 / 17-20期

关键词：

Double-sideband (DSB) modulation; optical fiber communication; orthogonal frequency-division multiplexing (OFDM); wavelength-division-multiplexing passive optical network (WDM-PON); wavelength reused technique;

D O I：

10.1109/LPT.2008.928841

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We have proposed and experimentally demonstrated a novel architecture for orthogonal frequency-division-multiplexing (OFDM) wavelength-division-multiplexing passive optical network with centralized lightwave. In this architecture, 16 quadrature amplitude modulation intensity-modulated OFDM signals at 10 Gb/s are utilized for downstream transmission. A wavelength-reuse scheme is employed to carry the upstream data to reduce the cost at optical network unit. By using one intensity modulator, the downstream signal is remodulated for upstream on-off keying (OOK) data at 2.5 Gb/s based on its return-to-zero shape waveform. We have also studied the fading effect caused by double-sideband (DSB) downstream signals. Measurement results show that 2.5-dB power penalty is caused by the fading effect. The fading effect can be removed when the DSB OFDM downstream signals are converted to single sideband (SSB) after vestigial filtering. The power penalty is negligible for both SS OFDM downstream and the remodulated OOK upstream signals after over 25-km standard single-mode-fiber transmission.

引用

页码：1545 / 1547

页数：3

共 7 条

[1] Wavelength remodulation using DPSK down-and-upstream with high extinction ratio for 10-Gb/s DWDM-passive optical networks [J].