First O-Band Optimised 1.6Tbps Coherent-Lite DSP

A latest O-band DSP for data centres enables sustainable and scalable connectivity over mid-range distances, addressing modern interconnect challenges.

A transformative innovation in optical connectivity has emerged with the launch of the industry’s first O-band-optimised 1.6Tbps coherent-lite DSP. This advanced digital signal processor (DSP) was developed by Marvell Technology, California, to address the growing need for energy-efficient, scalable solutions in campus-based data centre interconnects (DCIs). Optimised for distances of 2km to 20km, the new DSP caters to the increasing bandwidth demands of distributed data centres.

Traditional data centres face challenges related to space and power constraints, prompting a shift toward distributed, campus-style facilities. While existing technologies like PAM4 and coherent DCIs address short-range and regional connections, mid-distance requirements have lacked an efficient solution. This coherent-lite DSP bridges the gap by integrating advanced modulation techniques with O-band optics, ensuring cost efficiency, sustainability, and high performance. It is particularly suited for hyperscale data centre operators, cloud service providers, and AI-driven enterprises seeking reliable and scalable mid-range connectivity solutions.

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Industry experts emphasise the innovation’s significance. “Interconnect bandwidth, data centre traffic, and capacity needs are growing exponentially due to AI advancements,” noted Xi Wang, vice president, optical connectivity, Marvell. “This new DSP offers operators a sustainable and scalable path for meeting these demands.”

Unlike traditional coherent DSPs optimised for C-band, this O-band-focused solution minimises power consumption and latency while supporting 1.6Tbps of bandwidth in compact module designs. Such advancements enable cloud and AI services to flourish while promoting environmental sustainability.

The DSP’s introduction aligns with a larger industry trend toward energy-efficient solutions. Vlad Kozlov, CEO, LightCounting, highlighted, “Shipments of coherent-lite solutions are projected to exceed 1 million units annually by 2029.” This projection underscores the growing reliance on this technology for mid-range connectivity in hyperscale data centres.

By accommodating future bandwidth needs with scalable architecture, the innovation addresses the pressing challenges of the data infrastructure sector. As operators transition toward carbon-neutral facilities, the technology’s low power and high performance stand as vital tools for achieving these goals.

Sampling of this DSP has commenced, signalling its readiness to redefine the landscape of data centre interconnectivity.