As 800G optical modules enter mass-volume production and 1.6T products start sample delivery, the industry focus has quietly shifted from cutting costs for pluggable transceivers to redefining optical coupling equipment for the CPO (Co-Packaged Optics) and silicon photonics era. As an equipment manufacturer with long-term experience serving optical communication packaging, Xingte Technology sorts out how equipment specifications are reshaped across technology generations. While this evolution centers on optical alignment precision, it also covers nearly all core equipment capabilities: motion control, software algorithms, material handling and full-line integration.
Phase 1: Pluggable Transceiver Era (400G and earlier)
In the 400G and pre-400G pluggable era, each module only required alignment for one or a few optical paths, with large light spots and wide alignment tolerances. Manual and semi-automatic coupling systems fully met production demands. The core evaluation criteria for equipment were low cost, ease of use and fast commissioning.
The yield was largely determined by optical engineers’ experience rather than equipment parameters. A skilled technician could finish alignment within tens of seconds by observing microscope images and power meter readings, while new operators would take far longer. Competition among equipment suppliers focused on travel range, moving speed and basic positioning accuracy. Today’s key indicators including sub-micron closed-loop control and multi-channel parallel alignment were not top priorities for customers back then. In a sense, it was an era where skilled operators acted as the core of production equipment.
Phase 2: 800G/1.6T Transition Period
With the arrival of 800G and 1.6T products, channel counts per module have doubled. Fiber Arrays (FA) need simultaneous alignment for multiple optical beams; light spots shrink and alignment tolerances drop to the sub-micron level. Fully automatic active alignment has evolved from an optional high-end feature to a mass-production standard. Six-degree-of-freedom positioning, real-time optical power feedback and high repeat positioning accuracy become basic requirements. Equipment vendors now compete on peak-seeking speed, material handling efficiency and overall production line yield.
The coupling equipment we delivered in this phase is designed to stabilize single-channel alignment consistency and ensure uniform performance across multi-channel alignment. Meanwhile, customers start to require full data traceability, yield statistics and shorter model changeover time. Equipment is no longer just a mechanical actuator, but an integrated node within the factory data system.
Phase 3: CPO Co-Packaged Optics Era
CPO and silicon photonics push technical requirements to an extreme. In co-packaged architectures, optical engines are placed extremely close to switching chips. Fiber arrays directly interface with silicon photonic chips, and a single optical engine often requires dozens or even hundreds of active alignment operations. This brings three new requirements for coupling equipment:
- Multi-channel synchronous calibration: sequential single-channel alignment is no longer feasible; parallel scanning and parallel locking are mandatory.
- Long-term stable sub-micron repeat positioning: a single failed bonding operation may lead to scrapping an entire tray of components.
- Deep process integration with silicon photonics packaging: coupling, curing and inspection must be completed almost on the same workstation.
In short, CPO-era coupling equipment is no longer a standalone alignment platform, but a high-precision optical packaging workstation system. Its complexity rises stepwise rather than linearly compared with standalone 800G coupling machines.
Xingte Technology’s Industry Outlook
We have three core judgments based on this technology roadmap:
- Equipment development is shifting from single-channel high precision to multi-channel parallel high precision. Manufacturers that can compress hundreds of alignment cycles into acceptable takt time will secure admission to the CPO mass-production market.
- High precision cannot exist as an isolated metric; it must be achieved alongside high throughput and high consistency, otherwise process fluctuations will severely erode production yield.
- Equipment suppliers need in-depth understanding of silicon photonic device design, including waveguide layout, fiber array packaging and curing stress, all of which directly determine coupling strategies.
We also observe that CPO will not fully replace pluggable transceivers overnight. The two architectures will coexist for a long period: pluggable modules retain cost and maintainability advantages for short-reach data center interconnections, while CPO enables higher bandwidth density for switch-side systems. This means equipment manufacturers need to support two parallel process routes: sub-micron active alignment for pluggables and multi-channel co-packaged alignment for CPO.
We are developing next-generation coupling and packaging workstations following the above three directions, and we welcome deeper cooperation with optical module and silicon photonics partners to move CPO technology from prototype validation to large-scale mass production. Technology generation shifts will not wait for any single manufacturer, yet equipment capability is accumulated step by step during every industry transition.
Disclaimer: Descriptions of alignment counts and channel density for CPO modules are generalized industry technology trends. Specific solutions and parameters shall be subject to public technical documents released by each manufacturer.
