Serial 103.125-Gb/s Transmission over 1 km SSMF for Low-Cost, Short-Reach Optical Interconnects

Real-Time 100 Gb/s Transmission Using Three-Level Electrical Duobinary Modulation for Short-Reach Optical Interconnects

“…4, in the optical B2B case the bandwidth is mainly limited by the electrical amplifiers, interfaces and ICs. However, fibre operating in C-band severely degenerates the flatness of the frequency response, especially at 2 km showing the increased challenges compared to [8]. Together with the bandwidthlimited components and the dispersive fibre, the real-time FFE in the TX is engaged to create an equivalent channel response that transforms the NRZ from the serializer output into 3-level duobinary at the RX input.…”

“…Advanced modulation formats, such as 4-level pulse-amplitude modulation (PAM-4) [4] [5] discrete multi-tone (DMT) [6] [7] and electrical duobinary (EDB) [8]- [10] overcome this limitation by improving the spectral efficiency while maintaining the benefits of direct detection. However, most of the realized 100 Gb/s class DMT, PAM-4 and EDB demonstrations [3]- [8] are based on off-line digital signal processing (DSP). The realization of 100 Gb/s class real-time DMT transmission [11] is hindered by the huge amount of calculations which are very energy demanding.…”

“…EDB), is gaining a lot of attention [8]- [10]. Compared to OOK, the three-level signaling in EDB or optical duobinary (ODB) narrows optical spectral bandwidth improving the CD tolerance and the equalization requirements of the high-speed serial link [10] [13].…”

“…In [8], 103.125 Gb/s is realized using the EDB scheme over 1 km SSMF with off-line processing. As in this paper communication up to 2 km SSMF is considered, a significant increase in the CD influence compared to [8] is introduced. This paper is an invited extension of our work presented in a post deadline paper of ECOC 2016 [14].…”

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

“…In short reach OI system, MCF combined with spectral efficient higher order modulation format is considered as an alternate efficient method to increase the transmission capacity provided crosstalk tolerance is decreased concurrently [16]. On-off keying (OOK) is the only modulation and main source of interest for short reach commercial links today, since they are sufficiently low cost with low power consumption [17]. However, to realize spectrally efficient short reach optical transmission, various modulation formats, such as quadrature amplitude modulation in combination with sub-carrier modulation [18], carrier-less amplitude/phase modulation [19], pulse amplitude modulation [20], poly-binary modulation and discrete multi-tone modulation [20] have been recently reported.…”