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Pulse patterning effect in optical pulse division multiplexing for flexible single wavelength multiple access optical network

机译：灵活的单波长多址光网络中光脉冲分复用中的脉冲模式效应

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摘要

A demand for high spectral efficiency requires multiple access within a single wavelength, but the uplink signals are significantly degraded because of optical beat interference (OBI) in intensity modulation/direct detection system. An optical pulse division multiplexing (OPDM) technique was proposed that could effectively reduce the OBI via a simple method as long as near-orthogonality is satisfied, but the condition was strict, and thus, the number of multiplexing units was very limited. We propose pulse pattern enhanced OPDM (e-OPDM) to reduce the OBI and improve the flexibility in multiple access within a single wavelength. The performance of the e-OPDM and patterning effect are experimentally verified after 23-km single mode fiber transmission. By employing pulse patterning in OPDM, the tight requirement was relaxed by extending the optical delay dynamic range. This could support more number of access with reduced OBI, which could eventually enhance a multiple access function.
机译：对高频谱效率的需求要求在单个波长内进行多次访问，但是由于强度调制/直接检测系统中的光学拍频干扰（OBI），上行链路信号会显着降低。提出了一种光脉冲分复用（OPDM）技术，只要满足近正交性，就可以通过简单的方法有效地降低OBI，但是条件很严格，因此复用单元的数量非常有限。我们提出了脉冲模式增强型OPDM（e-OPDM），以减少OBI并提高单个波长内多路访问的灵活性。在23公里单模光纤传输后，通过实验验证了e-OPDM的性能和图案形成效果。通过在OPDM中采用脉冲图案化，可以通过扩展光学延迟动态范围来缓解严格的要求。这可以通过减少OBI支持更多的访问，最终可以增强多路访问功能。

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