All-optical OFDM transmitter design using AWGRs and low-bandwidth modulators.
All-optical OFDM transmitter design using AWGRs and low-bandwidth modulators.
复制标题
使用AWGR 和低带宽调制器的全光 OFDM 发射机设计。
作者：
Arthur James Lowery;L. Du
阵列波导光栅路由器（AWGR）可以用作光OFDM系统的解复用器，因为它在一个组件中提供了串行到并行转换器和光学傅里叶变换（FT）。因为逆FT在拓扑上与傅立叶变换相同，所以AWGR也可以用作OFDM发射机中的FT。在大多数全光OFDM系统中，光调制器被馈送有CW音调;然而，如果数据调制器的带宽与所有子载波的总带宽相似，则子载波（SC）将仅是完全正交的。使用模拟，本文探讨了调制器带宽的减少，可以实现如果调制器被放置在AWGR设计为FT之前。这种布置还允许用更简单和更紧凑的相位调制器来替换复杂（IQ）调制器。我们表明，这些设计的改进，使7.5 GHz带宽调制器中使用的4 × 10 Gsymbol/s（80 Gbit/s）每偏振每波长系统。
An Arrayed-Waveguide Grating Router (AWGR) can be used as a demultiplexer for an optical OFDM system, as it provides both the serial-to-parallel converter and the optical Fourier transform (FT) in one component. Because an inverse FT is topologically identical to a Fourier transform, the AWGR can also be used as a FT in an OFDM transmitter. In most all-optical OFDM systems the optical modulators are fed with CW tones; however, the subcarriers (SC) will only be perfectly orthogonal if the bandwidth of the data modulators is similar to the total bandwidth of all subcarriers. Using simulations, this paper investigates the reduction in modulator bandwidth that could be achieved if the modulators are placed before an AWGR designed as a FT. This arrangement also allows the complex (IQ) modulators to be replaced with simpler and more-compact phase modulators. We show that these design improvements enable 7.5-GHz bandwidth modulators to be used in a 4 × 10 Gsymbol/s (80 Gbit/s) per polarization per wavelength system.
影响因子：
35
作者：
Hillerkuss, D.;Schmogrow, R.;Leuthold, J.
通讯作者：
Leuthold, J.