Generation of optical OFDM signals using 21.4 GS/s real time digital signal processing

被引：55

作者：

Benlachtar, Yannis ^{[1
]}

Watts, Philip M. ^{[1
,2
]}

Bouziane, Rachid ^{[1
]}

Milder, Peter ^{[3
]}

Rangaraj, Deepak ^{[3
]}

Cartolano, Anthony ^{[3
]}

Koutsoyannis, Robert ^{[3
]}

Hoe, James C. ^{[3
]}

Pueschel, Markus ^{[3
]}

Glick, Madeleine ^{[4
]}

Killey, Robert I. ^{[1
]}

机构：

[1] UCL, Dept Elect & Elect Engn, Opt Networks Grp, London WC1E 7JE, England

[2] Univ Cambridge, Comp Lab, Cambridge CB3 0FD, England

[3] Carnegie Mellon Univ, Dept Elect & Comp Engn, Pittsburgh, PA 15213 USA

[4] Intel Res Pittsburgh, Pittsburgh, PA 15213 USA

来源：

OPTICS EXPRESS | 2009年 / 17卷 / 20期

基金：

英国工程与自然科学研究理事会;

关键词：

DISPERSION COMPENSATION; TRANSMISSION; FIBER; SPM; DSP;

D O I：

10.1364/OE.17.017658

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We demonstrate a field programmable gate array (FPGA) based optical orthogonal frequency division multiplexing (OFDM) transmitter implementing real time digital signal processing at a sample rate of 21.4 GS/s. The QPSK-OFDM signal is generated using an 8 bit, 128 point inverse fast Fourier transform (IFFT) core, performing one transform per clock cycle at a clock speed of 167.2 MHz and can be deployed with either a direct-detection or a coherent receiver. The hardware design and the main digital signal processing functions are described, and we show that the main performance limitation is due to the low (4-bit) resolution of the digital-to-analog converter (DAC) and the 8-bit resolution of the IFFT core used. We analyze the back-to-back performance of the transmitter generating an 8.36 Gb/s optical single sideband (SSB) OFDM signal using digital up-conversion, suitable for direct-detection. Additionally, we use the device to transmit 8.36 Gb/s SSB OFDM signals over 200 km of uncompensated standard single mode fiber achieving an overall BER <10(-3). (C) 2009 Optical Society of America

引用

页码：17658 / 17668

页数：11

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