Abstract

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

S-, C- and L-band transmission over a 157 nm bandwidth using doped fiber and distributed Raman amplification

Benjamin J. Puttnam, Ruben S. Luís, Georg Rademacher, Manuel Mendez-Astudillio, Yoshinari Awaji, and Hideaki Furukawa
Opt. Express 30(6) 10011-10018 (2022)

214.7 Tbit/s S, C, and L-band transmission over 50 km SSMF based on silicon photonic integrated transceivers

Xu Zhang, Ming Luo, Jia Liu, Daigao Chen, Qingyu He, Honglin Ji, Yan Wu, Ping Du, Liang Mei, Yaqin Wang, Hongguang Zhang, Lei Wang, Zhixue He, Xi Xiao, and Shaohua Yu
Opt. Express 31(25) 41546-41555 (2023)

30Tb/s C- and L-bands bidirectional transmission over 10,181km with 121km span length

Dayou Qian, Ming-Fang Huang, Shaoliang Zhang, Yequn Zhang, Yue-Kai Huang, Fatih Yaman, Ivan B. Djordjevic, and Eduardo Mateo
Opt. Express 21(12) 14244-14250 (2013)

Few-mode optical fiber with a simple double-layer core supporting the O + C + L band weakly coupled mode- division multiplexing transmission

Shuqi Mo, He Zhu, Jie Liu, Junyi Liu, Jingxing Zhang, Lei Shen, Xin Wang, Dawei Wang, Zhaohui Li, and Siyuan Yu
Opt. Express 31(2) 2467-2479 (2023)

Ultra-broadband 3-dB coupler based on dual-hollow-core polymer fiber covering E + S + C + L + U band

Haoqiang Jia, Shuqin Lou, Donglian Hou, Lu Xue, Xinzhi Sheng, Paul K Chu, and Xin Wang
Opt. Express 31(18) 29877-29886 (2023)