Transmission of 61 C-Band Channels Over Record Distance of Hollow-Core-Fiber With L-Band Interferers

We report on two recirculating loop transmission experiments over a hollow-core fiber of the Nested-Antiresonant Nodeless type (NANF). transmitted 61 channels in C-band at 32 GBaud, with either PM-QPSK or PM-16QAM modulation. In addition, L-band interferers co-propagated NANF all times, though they were not recirculated loop, to check for presence possible crosstalk effects between C and NANF. The comprised longest line yet constructed (7.72 km), as well 55 km pure-silica-core (PSCF) needed provide enough signal buffering EDFA stabilization loop. launch power into PSCF was low avoid generation any significant non-linear noise. Using PM-QPSK, we achieved record 618 (80 recirculations), an overall average GMI 3.44 bits/symb. PM-16QAM, 201 transmission, 7 saw no adverse effect from If progress reduction loss inter-modal interference continues rate last few years, these fibers might become promising alternative quest next-generation higher-throughput fibers, given their theoretical potential achieving ultra-low non-linearity ultra-wide bandwidths, ideally bringing about many-fold increase throughput per fiber.