Enhancing optical communications with brand new fibers

High-Capacity Directly Modulated Optical Transmitter for 2-μm Spectral Region

“…To keep pace with the increasing traffic demand at a reasonable cost-per-bit, new physical layer technology for communication networks will soon be necessary. In the search for solutions, the research community is investigating various new approaches [5]. For instance, mode division multiplexing assisted by MIMO (Multiple-Input-Multiple-Output) signal processing has recently attracted much interest and shown impressive data transmission performance [6].…”

Diode-pumped Wideband Thulium-doped Fiber Amplifiers for Optical Communications in the 1800 - 2050 nm Window

“…The quest for increasing transmission capacity has stimulated interest in radical approaches, which may eventually justify a shift away from the traditional operating wavelengths around 1.55 μm 1 . Thulium-doped fiber amplifiers (TDFAs) operating around 2 μm offer the broadest gain spectrum of all rare-earth doped fiber amplifiers and represent an attractive route towards significantly enhanced transmission bandwidths 2 .…”

Augmenting data rate performance for higher order modulation in triangular index profile multicore fiber interconnect

“…In order to obtain mode coupling coefficient between adjacent cores, firstly electric field distribution of MCF is calculated using commercial finite element analysis software FemSIM [9]. Key issue of inter-core crosstalk in MCF interconnects transmission system is evaluated in absence of nonlinear noise as MCF is less sensitive to fiber nonlinearities [6]. Crosstalk in any core 'A' is defined as the ratio of crosstalk power leaking into 'A' from adjacent core to the signal power guided in core 'A'.…”

“…The key issues for design of the forthcoming heterogeneous and bandwidth intensive OI are high fiber count and high density cable with minimum escalation in link cost and power budget [4,5]. The SDM technology based on multicore fibers (MCFs) has potential to thrust the data traffic capacity up to an unprecedented level [6]. Recently, with shortrange MCF OIs an aggregate data transmission capacity of 240 Gbps has experimentally been achieved in a multichannel transmission using low-cost vertical cavity surface emitting lasers [7].…”

“…MCF with SDM, not only increases system capacity but is also less vulnerable to limits imposed by fiber non-linearity as it guides less power per core [6]. However, one of the most critical issues impending efficient usage of MCF as OI, is inter-core crosstalk [10][11][12][13].…”