Towards 400GBASE 4-lane Solution Using Direct Detection of MultiCAP Signal in 14 GHz Bandwidth per Lane

Abstract

Abstract:We report on an experimental demonstration of 102 Gbit/s transmission over a 15km single wavelength and polarization fiber link with 14GHz 3dB bandwidth. Novel multi-band CAP signaling allows for a 4-lane 400GBASE long reach solution.

Real-time 100 Gbps/λ/core NRZ and EDB IM/DD transmission over multicore fiber for intra-datacenter communication networks

“…The average attenuation per core is less than 0.2 dB/km at 1550 nm. The FI/FO is realized by chemically etching the 7 bare SMF until the cladding diameter matches the MCF core pitch and arranging them in the hexagonal lattice [7]. The insertion loss per FI/FO is less than 1.5 dB.…”

“…In the near future, the need for 400G connectivity and beyond has been crystal clear for intradatacenter networks [2,3]. Intra-datacenter interconnects (DCIs) comprise server-to-ToR (top of rack), ToR-to-fabric, and inter-fabric links, covering links with transmission distances from tens of meters to several kilometers [4].To address the growing capacity demands in DCIs, research efforts have been put on improving the single lane rate, e.g., to 100 Gbps and beyond with intensity modulation and direct detection (IM/DD) systems [5][6][7][8][9]. In addition, low latency should be guaranteed for time-critical services involving DCNs (e.g., remote control), and therefore heavy digital signal processing (DSP) needs to be avoided.…”

High-speed and efficient silicon modulator based on forward-biased pin diodes

“…Total transmission capacity urgently needs to be scaled up for transceivers in optical fiber communications [1][2][3][4][5]. Increasing the channel rate with the baud rate or using multi-level modulation is relatively simple since numbers of photonic and electronic devices inside the transceiver remain constant.…”

“…Increasing the channel rate with the baud rate or using multi-level modulation is relatively simple since numbers of photonic and electronic devices inside the transceiver remain constant. The bit rate on a single optical carrier has already exceeded 100 Gb/s [1][2][3][6][7][8][9]. Even when these wide-bandwidth technologies are used, it is necessary to use parallel links [4], wavelengths [1,5,10,11] or polarization multiplexing [3,[6][7][8]12], or combinations of them, to reach the targets of the next and future generations of transceivers, such as 400 Gb/s and 1 Tb/s.…”

10 Gbps Five Levels Polibinary Signaling for Short Range and Access Networks

“…These scenarios are currently requiring 400G and 40-100G solutions, respectively. Different techniques have been used for advanced modulation, such as discrete multitone (DMT) [3], carrierless amplitude/phase (CAP) [4], orthogonal frequency division multiplexing (OFDM) [3], and N-pulse amplitude modulation (N-PAM) [6]. Additionally, duobinary modulation has been extensively used in high-capacity backplanes [7], where the roll-off of the backplane itself matches the spectrum profile of the duobinary signal.…”