An upgrade to 40 Gb/s transmission and detection for advanced optical communications systems

最近与加拿大光通信设备供应商的磋商引出了一个主题，作为未来系统的一个共同的，最大的关注：使用40 Gb/s及以上的传输速率所产生的非线性影响。接下来是高级调制格式的研究，如差分移位键控（DPSK）和正交频分复用（OFDM）。当调查光通信的文献时，这并不奇怪，通常报告的结果是40 Gb/s的点对点和网络通信，包括长途和城域。两位申请人是国际公认的实验家，在有源设备和系统的非线性动态行为方面具有丰富的经验。互联网流量的爆炸性增长是将光纤链路的传输容量增加到40gb /s或更高的巨大兴趣背后的驱动因素。与10gb /s系统相比，传输受到光纤非线性、噪声积累、偏振模色散（PMD）、色散变化和串扰的限制。提出的升级到40gb /s系统将能够研究先进的调制和前向纠错，以减轻光纤传输障碍；光信号处理，以减轻光纤传输障碍；低损耗光学元件，最大限度地减少光放大要求和由此产生的噪声；低噪声光放大器

A recent consultation with Canadian optical telecommunications equipment providers elicited one topic as the single common, greatest concern for future systems: nonlinear effects from the use of transmission rates of 40 Gb/s and beyond. Next in line was the study of advanced modulation formats such as differential shift keying (DPSK) and orthogonal frequency division multiplexing (OFDM). This comes at no surprise when surveying the literature for optical communications, where results are commonly reported at 40 Gb/s for point-to-point and networked communications, both long haul and metro.  The two applicants are internationally recognized experimentalists with extensive experience in the nonlinear dynamic behaviour of active devices and systems.The explosive traffic growth in the Internet traffic has been the driver behind the enormous interest in increasing the transport capacity of fibre links to 40 Gb/s and higher. As compared to 10 Gb/s systems, transmission is limited by fibre nonlinearities, noise accumulation, polarization mode dispersion (PMD), chromatic dispersion variations and crosstalk. The proposed upgrad to 40 Gb/s systems will enable research into- advanced modulation and forward error correction to mitigate fibre transmission impairments- optical signal processing to mitigate fibre transmission impairments- low-loss optical components minimizing optical amplification requirements and resulting noise- low-noise optical amplifiers