40 × 112 Gb/s transmission over an unrepeatered 365 km effective area-managed span comprised of ultra-low loss optical fibre

Unrepeatered DP-QPSK Transmission Over 352.8 km SMF Using Random DFB Fiber Laser Amplification

“…In [19] authors showed 342.7 km of an unrepeatered SMF transmission but with lower capacity. The record high capacity of 15 Tb/s unrepeatered transmission was presented in [20] and 4 Tb/s in [21], however, in both papers the total link attenuation was lower than in our case.…”

Real-time Single Laser based 3.2 Tb/s (32×100-Gb/s) PM-QPSK Transmission using Coherent Detection Over 2,080-km SSMF

“…In [2], a real-time single wavelength coherent 100-Gb/s PM-QPSK signal was obtained and transmitted over 1,800-km standard single mode fiber (SSMF) in the field environment. J. D. Downie et al demonstrated 40´112-Gb/s transmission over a 365-km unrepeatered span (59.6dB) with a complex span configuration employing three different types of fibers [3], and H. Bissessur et al achieved transmission of real-time processed 4´100-Gb/s over 462-km (76.9dB) with a POPA and a strong third-order Raman pumping scheme with mixed fiber types [4]. By employing independent light sources, coherent real-time 34´120-Gb/s PM-QPSK signals were demonstrated over 432.8-km unrepeatered links of standard effective-area pure-silica-core fiber [5].…”

557-km Unrepeatered 100G Transmission with Commercial Raman DWDM System, Enhanced ROPA, and Cabled Large Aeff Ultra-Low Loss Fiber in OSP Environment

“…Another application is subsea links to connect sparsely populated islands for which an unrepeatered system -without submerged repeaters and associated power feed equipment -yields a more cost effective and thus viable solution. Over the past 5 years, 100G transmission experiments have reported increasing unrepeatered distances [1][2][3][4][5][6], thanks to the introduction of more powerful FEC coding, ultra-low loss and large A eff optical fiber, and optimized Raman / Remote Optically Pumped Amplifier (ROPA) architecture. Figure 1 shows the trend of unrepeatered distances at 100G in recent years.…”