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POLARIZATION MAINTAINING (PM) FIBER OPTIC INTERCONNECTS
Optimum control of the signal polarization state
� Diamond PM measuring method follows IEC 61300-3-55 (proposed and drafted by Diamond)
� Expertise with a large variety of PM fibers
� Optimized glue polymerization process for a minimized thermal- induced stress ➟ increase in PER
� Independent optimization of IL and 휓 � High PER and small-core fibers (Ø < 5 μm)
� 100% inspection and measurement
Solutions Marketing, explained: “Both the WaveLogic 6 Extreme (WL6e) and Wave- Logic 6 Nano (WL6n) support up to 1.6Tbps per wavelength. WL6e is the first to leverage 200GBd optics, while the WL6n can be combined with between 120-140GBd optics for coherent 400G-800G pluggables, 400G long-haul and 800G metro/regional appli- cations, and for interoperable 800ZR data centre interconnect (DCI). We have doubled the capacity of the WL6e, but have the same hardware, so there is a 50% reduction in footprint, a 50% reduction in power-per-bit and 15% increase in spectral efficiency.”
Proving validity Acacia’s (part of Cisco) coherent solution, the CIM 8, has begun to ship to Tier-1 carri- er customers for network field trials. CIM 8 supports data rates up to 1.2Tbps, powered by Jannu, the company’s 8th generation DSP ASIC, based on a 5nm CMOS using silicon photonic technology. Live network trials have taken place over ultra-long-haul, long- haul and regional network distances. They were undertaken in partnership with Adtran, and with carriers including China Mobile and Windstream Wholesale. Nokia has also field trialled the PSE 6s in
a live network, in partnership with European operator GlobalConnect. A speed of 1.2Tbps was achieved over metro distances (118km) and 800Gbps over long-haul distances (2,019km), both using a single wavelength.
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More terabit tech It’s not just coherent DSPs moving into terabit territory; OFC also saw a number of announcements pointing to PAM4-based solutions also reaching these data rates. On the optics side, as OFC was opening its doors, Marvell announced the launch of its first 1.6Tbps PAM4 electro-optics platform, the Nova, for cloud, artificial intelligence (AI), machine learning (ML) and data centre networks. Powered by a 200Gbps optical DSP, Nova enables 1.6Tbps pluggable modules for scaling AI clusters. Key features include a 200Gbps per channel line side transmitter interface to support a range of
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As we get better with DSP processing and electro optics, the performance of those systems end up with increased reach and low- er power consumption
high-speed lasers; a 200Gbps per-channel line-side receiver with companion Marvell 112GBd trans impedance amplifiers (TIAs) to offer linearity and low noise; integrated laser drivers and latency-optimised forward error correction (FEC) for 200Gbps traffic. In other technology announcements,
Nokia’s sixth-generation coherent photonic service engine, the PSE-6s, is designed to power the next generation of coherent transport at up to 1.2Tbps
startup Nubis Communications recently launched its first optical engine, the XT1600, designed to be optimised from the ground up for machine learning and artificial intelli- gence networks. The company was founded in 2020 and subsequently raised more than $40m to fund the development of its first product to volume production. Samples are already available to customers. The XT1600 has a total capacity of 1.6Tbps optical transmit and 1.6Tbps receive carried over 16 fibre pairs, allowing full fan-out and flexible assignment as 16 independent 100Gbps full-duplex channels, four separate 400Gbps full-duplex channels, or two 800Gbps full-duplex channels. It is optimised for unretimed direct-drive operation, connecting directly with host ASIC SerDes designed for copper links. This approach is designed to lower the power, size, and cost of the solu- tion. The underlying technology behind it is a 16 x 112Gbps (full duplex) silicon photon- ics engine with integrated modulator drivers and trans impedance amplifiers. Founder Peter Winzer – a 2023 Photon- ics100 honouree – explained: “Our solution is optimised to work with modern SerDes, not only pitch matching to their edge I/O density but meshing with their capabilities for power-efficient direct-drive. The result is that AI accelerators or similar large ASICs can achieve full bandwidth connectivity within the data centre at a fraction of the power compared to traditional optical solu- tions. Further, our approach lends itself well to novel emerging box architectures, as well as to native chiplet implementations for even tighter integration in the future.” With most of these technologies commercially available this year and early 2024, what next? According to Omdia’s Munks: “Following the 1.2Tbps, we’re expecting 1.6Tbps on a single carrier, and those will operate up around 200GBd. These are scheduled in 2024 for sampling and probably 2025 for commercial use. “We expect that this will be followed
by 2.4Tbps and, following that, probably 3.2Tbps. We expect all of this to happen within this decade.” EO
www.electrooptics.com
Nokia
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