O-band 400 Gbit/s Client Side Optical Transmission Link

Enabling 4-Lane Based 400 G Client-Side Transmission Links with MultiCAP Modulation

“…In this review paper we demonstrate the flexibility of the IM/DD MultiCAP based solutions for a SR 100 m link [4], a LR 20 km link, and an ER 40 km link [5]. A SR client-side link that achieves error-free 65.7 Gbps over a 100 m multimode fiber (MMF) OM3 using an 850 nm vertical cavity surface-emitting laser (VCSEL) is presented.…”

“…In the LR of 10 km, NRZ coding enables 25 Gbps [10], 4-PAM 50 Gbps [11], CAP-64QAM 60 Gbps [12], and DMT 106 Gbps [13]. MultiCAP achieves 108 Gbps per lane with 20 km reach [5]. In the ER of 40 km, NRZ coding allows 40 Gbps per lane [14].…”

“…In the ER of 40 km, NRZ coding allows 40 Gbps per lane [14]. Beyond 100 Gbit/s per lane for ER is reached by DMT modulation [15] and MultiCAP [5]. The DD/IM WDM-based 400 Gbps systems were demonstrated as feasible in several of the cited works (indicated in Figure 2).…”

“…Eight lanes × 40 Gbps [14] or 16 lanes × 25-Gbps [10] were used to reach 400 Gbps with NRZ coding. A four-lane LAN-WDM 400 Gbps solution was demonstrated using DMT over 30 km [16] and MultiCAP over 40 km standard single mode fiber (SSMF) [5]. Both of them assume the 7% FEC overhead.…”

100 Gbps IM/DD links using quad-polarization: Performance, complexity, and power dissipation

“…Thus, alternative solutions such as higher order modulation formats and space division multiplexing have been proposed. Higher spectral efficiency for data links has been explored employing 4 levels pulse amplitude modulation (4-PAM) [2], duo-binary modulation [3], and even more complex modulation formats such as discrete multitone (DMT) modulation [4] or carrierless amplitude phase (CAP) modulation [5].…”