Beyond the Pluggable Era: How Co-Packaged Optics and 1.6T Interconnects Are Reshaping the Data Center Fabric

For most of the past decade, pluggable optical transceivers have been the workhorse of data center interconnect. They are field-replaceable, vendor-interoperable, and well understood by network operations teams. But the physics of pluggable optics are beginning to buckle under the compounding demands of next-generation compute infrastructure. As AI-driven workloads, distributed training clusters, and real-time data pipelines push switching capacities toward 51.2T and beyond, the copper channels between ASIC and front-panel pluggable module become an increasingly expensive thermal and signal-integrity liability. This inflection is not hypothetical — it is being negotiated in procurement cycles and silicon roadmaps right now.

Nexvora's assessment is that the global co-packaged optics (CPO) and 1.6T data center interconnect market stands at an estimated US$1.9–2.4 billion in 2025 and is on a trajectory to reach US$20–28 billion by 2032 — a compound annual growth rate modeled at approximately 38–44%. That growth envelope is wide by design: the pace at which CPO moves from engineering pilots to volume deployment is genuinely uncertain, and Nexvora's scenario modeling reflects a range of adoption curves rather than false precision. What is clear is that the structural pressure driving this market — bandwidth demand outpacing the power and density budgets of conventional interconnect — is not going away. If anything, it is intensifying.

It is equally important to understand what this market is, compositionally, right now. More than four-fifths of near-term revenue in Nexvora's model is attributable to 1.6T optical interconnect products — high-speed pluggable modules, active electrical cables, and associated silicon — rather than fully co-packaged optical switch deployments. CPO remains, for 2025 and into 2026, a technology in late-stage pilots and early selective deployment. The market's center of gravity will shift over the coming years, but investors and strategists who conflate CPO readiness with 1.6T commercialization will misread near-term supply dynamics significantly.

The jump from 800G to 1.6T per port is not simply a doubling of throughput. It represents a fundamental renegotiation of the tradeoffs between optical reach, modulation complexity, lane count, and power consumption. 1.6T transceivers typically employ 200G per lane signaling — either as 8-lane or 4-lane variants depending on form factor — and achieving that signaling fidelity over meaningful distances requires tighter integration between the digital signal processor, the laser source, and the modulator. This engineering challenge is exactly why the supply chain around 1.6T has a different shape than the 400G-to-800G upgrade cycle: fewer vendors can deliver volume production at the required yield and performance specifications simultaneously.

From a deployment standpoint, Nexvora's research identifies three initial adoption vectors for 1.6T. First, high-density cloud switching fabrics, where the port-density and power-per-rack constraints of hyperscale spine layers make 1.6T's superior bandwidth-per-watt profile compelling even at current pricing. Second, metro data center interconnect, where operators are building coherent-capable 1.6T links between campuses to support data sovereignty, disaster recovery, and workload mobility without laying additional fiber. Third, campus-scale high-performance compute fabrics — particularly those supporting large GPU clusters — where latency-sensitive all-to-all communication patterns demand fat-tree topologies with maximum bisection bandwidth. These three verticals will account for the bulk of 1.6T volume through 2027, in Nexvora's assessment.

Implication for network architects: the decision to deploy 1.6T is increasingly a power-budget decision as much as a bandwidth decision. Operators that have already invested in detailed per-rack power modeling will find the business case for 1.6T easier to make. Those still operating on legacy port-count-centric procurement frameworks will need to update their analytical toolkit before the next refresh cycle.

Co-packaged optics — the integration of optical engines directly onto the switch package or substrate alongside the switching ASIC — promises a step-change reduction in the energy consumed by chip-to-optics interconnect. By eliminating the copper SerDes lanes that carry data from ASIC to front-panel pluggable, CPO architectures can deliver meaningful reductions in watts per transmitted bit and open the door to dramatically higher aggregate bandwidth density. These are not incremental improvements; at the switching capacities expected in 102.4T-class platforms, CPO may be the only architecturally viable path to meeting thermal and density constraints without impractical cooling infrastructure.

Despite the compelling physics, Nexvora models CPO as a modest share of total market revenue through 2027. The reasons are operational, not technological. Field serviceability remains the central procurement concern for network operations teams accustomed to hot-swappable transceivers. When an optical component fails in a CPO architecture, the replacement workflow is fundamentally different — and potentially involves taking a switch offline rather than swapping a single module. Reliability data at volume is still being accumulated, and customer confidence in long-term mean-time-between-failure performance requires real-world operating hours, not just laboratory validation. Standardization bodies are making progress, but interoperability across multi-vendor CPO implementations is not yet a solved problem.

Nexvora's modeled inflection point for CPO adoption falls in the 2028–2030 window. By then, 102.4T-class switching platforms will be entering their second-generation deployments, external laser source supply chains will have matured, and high-yield optical assembly processes will have driven unit costs lower. Critically, operators that have been running first-generation CPO pilots since 2025–2026 will have accumulated the operational experience to build internal confidence and update their maintenance and repair frameworks. The vendors that invest in that co-development relationship with early adopters today are the ones most likely to capture disproportionate share in the volume ramp.

In conversations with procurement decision-makers at hyperscale operators and large enterprise data center buyers, one theme emerges with remarkable consistency: power efficiency is no longer a secondary consideration in interconnect purchasing. It has become the primary lens through which total cost of ownership is evaluated. This shift has been accelerating for several years, driven by the combination of rising electricity costs in key markets, increasingly binding data center power capacity constraints, and sustainability commitments that carry board-level accountability.

Nexvora's assessment is that leading buyers are structuring interconnect RFPs explicitly around watts per transmitted bit, cooling burden at the rack and row level, and aggregate bandwidth achievable within a fixed power envelope. This reframing changes the competitive dynamics significantly. Products that look expensive on a per-port basis can become compelling when evaluated on a total power and cooling cost basis over a three-to-five-year asset lifecycle. Conversely, products with low initial capex but high operational power draw are facing increasing scrutiny. For vendors, this means that power performance data — measured under realistic traffic conditions, not theoretical peaks — is rapidly becoming a primary competitive differentiator, sometimes more important than raw throughput specifications.

Implication: vendors that lack a credible power efficiency narrative will find it increasingly difficult to win tier-one hyperscale deals regardless of price competitiveness on per-unit cost. Buyers have become sophisticated enough to model lifecycle power costs, and the data center operators most aggressively pursuing next-generation interconnect are precisely the ones with the most rigorous total-cost-of-ownership frameworks.

The transition from conventional pluggable modules to 1.6T and eventually CPO architectures is not simply a product upgrade cycle — it is a structural reorganization of where value is created and captured in the optical interconnect supply chain. Nexvora's analysis identifies five capability domains where supply chain positioning is becoming strategically decisive: silicon photonics integration, external laser sources, advanced packaging substrates, high-yield optical assembly, and system-level thermal and signal validation.

Silicon photonics is perhaps the most discussed of these, and for good reason. The ability to integrate waveguides, modulators, and photodetectors on standard CMOS wafer processes using established semiconductor fabs gives silicon photonics a cost and scalability advantage over indium phosphide-based approaches, particularly as volumes scale. However, silicon photonics alone does not win sockets. The laser source problem — silicon cannot emit light efficiently — requires either hybrid bonding of III-V gain chips or external cavity laser architectures, both of which introduce their own yield, reliability, and supply chain complexity challenges. Vendors that have developed robust solutions here hold a meaningful moat.

Advanced packaging substrates and high-yield optical assembly are less visible in analyst coverage but are equally critical to commercial success at scale. The ability to co-package optical and electrical components on a common substrate with the thermal management, mechanical tolerance, and assembly yield required for high-volume production is genuinely difficult. Several traditional EMS and OSAT providers are investing aggressively in these capabilities, and Nexvora expects consolidation in this tier of the supply chain as the volume ramp approaches. System-level validation — the ability to certify that a CPO switch or 1.6T module meets performance specifications across temperature, humidity, and vibration profiles relevant to real data center environments — is another capability that buyers are beginning to require from vendors rather than performing themselves.

Implication: the highest-margin positions in this market will belong to vendors that can offer integrated expertise across at least three of these five capability domains. Pure-play component suppliers will face commoditization pressure as system integrators and platform vendors seek to capture more of the value chain in-house or through strategic partnerships.

North America is modeled by Nexvora as the leading regional market through 2032, and the logic is straightforward: the world's largest hyperscale operators are headquartered there, their most advanced data center campuses are there, and their procurement decisions set the technology adoption curve that the rest of the market follows. The concentration of high-density compute infrastructure — particularly GPU cluster deployments supporting large-scale model training — in North American facilities creates both the demand intensity and the operational sophistication required to absorb first-generation CPO and 1.6T deployments.

Asia-Pacific, however, is where Nexvora expects the fastest growth in absolute and percentage terms over the second half of the forecast period. The region's manufacturing ecosystem — particularly in Taiwan, South Korea, Japan, and increasingly mainland China — is deeply embedded in the silicon photonics, advanced packaging, and optical component supply chains that underpin this market. Domestic hyperscale operators in the region are also scaling aggressively, and government-supported data center infrastructure programs in multiple Asia-Pacific markets are creating demand that is less dependent on the North American technology adoption curve than in previous interconnect generations. The combination of supply-side manufacturing leadership and accelerating domestic demand makes Asia-Pacific the region to watch for both competitive disruption and investment opportunity.

Europe occupies a mid-tier position in Nexvora's regional model — meaningful in absolute volume, driven largely by regional cloud provider buildouts and sovereign infrastructure investments, but constrained relative to North America and Asia-Pacific by a more fragmented hyperscale operator base and higher regulatory overhead in data center permitting and energy procurement. European adoption of 1.6T is expected to track North American deployments with an 18-to-24-month lag in most scenarios.

Nexvora's assessment of adoption risk is clear-eyed: the primary barriers to CPO scaling are not the photonics. They are the operational, organizational, and standards-related challenges that determine whether network operations teams can confidently deploy, maintain, and eventually repair CPO-integrated platforms at production scale. Field serviceability — the ability to address optical component failures without taking a switch offline — is the issue that network operations managers raise most consistently, and it is not yet resolved in a way that maps cleanly onto existing maintenance workflows.

Standardization is the second major barrier. The data center networking industry has benefited enormously from interoperability standards — from the original multi-source agreement framework for transceiver form factors to more recent pluggable coherent standards. CPO lacks an equivalent framework that buyers can rely on for multi-vendor interoperability. Several industry consortia are actively working on this, and progress is being made, but the standards timelines are long and the risk of fragmentation — where different hyperscale operators adopt incompatible CPO implementations — is real. This risk is one reason Nexvora's model applies a wide range to the CPO contribution forecast beyond 2028.

Component interoperability across optical engines, laser sources, substrates, and host ASICs from different vendors is closely related but distinct. Even within a single operator's CPO deployment, ensuring that components from different parts of the supply chain work together reliably under real operating conditions requires extensive system-level validation — a process that is time-consuming, expensive, and not easily outsourced. The vendors and operators that invest in building systematic validation infrastructure now will have a structural advantage when the volume ramp begins. Those that wait will find themselves in a queue behind better-prepared competitors.

For vendors, the near-term imperative is clear: 1.6T product competitiveness is the revenue story for 2025–2027, and CPO positioning is the strategic story for 2028 and beyond. Vendors that allow CPO roadmap ambitions to distract from 1.6T execution will sacrifice near-term market share without necessarily accelerating their long-term CPO position. The right balance is rigorous commercial focus on 1.6T volume production while simultaneously investing in CPO co-development partnerships with a small number of early-adopter operators who can provide real-world validation data. The latter investment is strategic infrastructure, not current-period revenue.

For investors, Nexvora's analysis points to several value-creation themes worth examining closely. Supply chain capability in silicon photonics integration, external laser sources, and high-yield optical assembly is genuinely difficult to replicate quickly, which means vendors with proven capability in these areas are likely to command durable margin premiums. System-level validation expertise — the ability to certify performance under real data center conditions — is underappreciated as a competitive differentiator and is worth examining in vendor due diligence. The regional manufacturing story in Asia-Pacific also warrants attention as both an opportunity and a competitive dynamic that will reshape vendor ranking over the forecast period.

For data center operators and network architects, the strategic message is to resist the temptation to wait for CPO maturity before engaging with the technology. The operators that begin structured CPO pilots in 2025–2026, invest in the operational and workforce development work required to support these architectures, and build genuine technical partnerships with leading vendors will be significantly better positioned when 102.4T-class switching platforms enter procurement cycles. The power and density economics at that switching capacity will be compelling enough that decision-makers without prior CPO experience will face a steep and costly learning curve. The time to begin that learning is now.