Kurosu Takayuki, Tanizawa Ken, Wang Dexiang, Set Sze Yun, Namiki Shu
Network Photonics Research Center, National institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 2, 1-1-1 Umezono, Tsukuba, Ibaraki 305-8568, Japan.
Opt Express. 2013 Feb 25;21(4):4447-55. doi: 10.1364/OE.21.004447.
We propose a novel scheme of OTDM utilizing pulse position modulation, where optical null headers (ONH) are inserted between the signal pulses periodically to allow channel identification. The ONH also achieves in-band clock distribution through the generation of high contrast pilot tone on the signal power spectra, enabling baud-rate flexible clock recovery. Using the novel scheme, clock recovery with a timing jitter of less than 200 fs is achieved at different baud rates up to 344 Gbaud. We demonstrate stable clock recovery with channel identification in 344-Gb/s OTDM transmissions over dispersion managed 3-km SMF.
我们提出了一种利用脉冲位置调制的新型光时分复用（OTDM）方案，其中光空包头（ONH）周期性地插入信号脉冲之间以实现信道识别。ONH还通过在信号功率谱上生成高对比度导频音来实现带内时钟分布，从而实现波特率灵活的时钟恢复。使用该新型方案，在高达344波特的不同波特率下实现了定时抖动小于200飞秒的时钟恢复。我们展示了在色散管理的3公里单模光纤上进行344 Gb/s OTDM传输时，具有信道识别功能的稳定时钟恢复。
