Hillerkuss D, Winter M, Teschke M, Marculescu A, Li J, Sigurdsson G, Worms K, Ben Ezra S, Narkiss N, Freude W, Leuthold J
1Institute of Photonics and Quantum Electronics, Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, Germany.
Opt Express. 2010 Apr 26;18(9):9324-40. doi: 10.1364/OE.18.009324.
A practical scheme to perform the fast Fourier transform in the optical domain is introduced. Optical real-time FFT signal processing is performed at speeds far beyond the limits of electronic digital processing, and with negligible energy consumption. To illustrate the power of the method we demonstrate an optical 400 Gbit/s OFDM receiver. It performs an optical real-time FFT on the consolidated OFDM data stream, thereby demultiplexing the signal into lower bit rate subcarrier tributaries, which can then be processed electronically.
介绍了一种在光域中执行快速傅里叶变换的实用方案。光实时傅里叶变换信号处理的速度远远超出电子数字处理的极限，且能耗可忽略不计。为说明该方法的强大功能，我们展示了一个光400 Gbit/s正交频分复用（OFDM）接收机。它对合并后的OFDM数据流执行光实时傅里叶变换，从而将信号解复用为较低比特率的子载波支路，然后可对其进行电子处理。
