Investigation of optical filter in direct-detected orthogonal frequency division multiplexing transmission
In this paper, we explore intermediate-frequency architecture direct-detected orthogonal frequency division multiplexing (DD-OFDM). In the simulation experiment of 10Gb/s DD-OFDM transmission over 640km standard single mode fiber (SSMF), the performance of optical signal to noise ratio(OSNR) and bit error rate(BER) have been analyzed by adjusting the bandwidth and order of the optical filters at transmitter and receiver. To achieve a BER of -3dB at receiver-end, OSNR of DD-OFDM can be improved ldB by using high order optical filters instead of common single-sideband (SSB) filters, and then ultimate performance of the filter has been researched when filter order gets 8 orders. The equivalent relationship between FBG filter and Gaussian bandpass optical filter has been given in DD-OFDM. Meanwhile, the selection of radio frequency can influence the performance of DD-OFDM. Comparing the frequency efficiency with the system sensitivity, the result shows that an optimization performance has been obtained by varying bandwidth gap.
Direct Detected optical filter OFDM optical transmission
Chen Qian Cao Ye Tong Zhengrong Yang Xiufeng
School of Computer and Communication Engineering, Tianjin Key Laboratory of Film Electronic and Communication Devices Tianjin University of Technology, 300384,Tianjin, China
国际会议
秦皇岛
英文
131-134
2010-11-05（万方平台首次上网日期，不代表论文的发表时间）