| 摘要 |
<p>A self-polarization diversity technique to combat PMD in a direct-detection optical OFDM system. This technique does not require any dynamic polarization control, and can simultaneous compensate PMD in a WDM system with one device. Simulation results show that this technique virtually completely eliminates the PMD impairments in direct-detection optical OFDM systems. The received optical signal is split into two portions, the first one of which is supplied to a direct-detection OFDM receiver. The second portion is supplied-through a circulator, fibre grating and Faraday rotator-to a second OFDM receiver, and the outputs of said two OFDM receivers are combined. To mitigate effects due to polarization misalignment between the carrier and the subcarriers of the received signal.</p> |
