IN Brief:
- Sivers is investing $30 million in its indium phosphide manufacturing operation in Glasgow.
- Planned capacity exceeds 100 million continuous-wave DFB lasers annually, with additional automation and process capability.
- Work begins in the second half of 2026, with the expanded facility expected to become operational in Q4 2027.
A $30 million expansion of Sivers Semiconductors‘ Glasgow indium phosphide operation will raise planned manufacturing capacity to more than 100 million continuous-wave distributed-feedback lasers a year.
The investment will add equipment, process capability, automation, and production flexibility as the company prepares for anticipated customer ramps in AI data-centre and optical-networking applications. Work is due to begin during the second half of 2026, with the expanded operation expected to become functional in the fourth quarter of 2027.
Sivers is coupling the expansion with a broader shift in manufacturing strategy. The company is moving from what it has described as a fab-lite structure towards hybrid manufacturing, retaining greater internal control over strategic photonics processes while continuing to use external foundry, packaging, and manufacturing partners.
The Glasgow operation is centred on indium phosphide, a III-V semiconductor material widely used for optical sources at telecommunications wavelengths. DFB lasers incorporate a wavelength-selective grating within the device structure, providing controlled optical output for systems where wavelength stability and spectral performance are central to the link design.
The continuous-wave devices covered by the expansion provide a stable optical source that can be modulated elsewhere in the photonic system. That separation is relevant to architectures using external laser sources, silicon photonics, wavelength multiplexing, and co-packaged optical components.
AI infrastructure has increased attention on those architectures because data movement is becoming a larger part of the power and signal-integrity problem inside large compute clusters. Higher data rates and longer electrical reaches increase loss, equalisation requirements, and thermal load, making optical links attractive for more connections between accelerators, switches, memory, and racks.
Greater use of optics creates a manufacturing problem of its own. More links mean more lasers, photonic integrated circuits, packages, fibre interfaces, and test operations, all of which have to be manufactured with enough repeatability to support infrastructure produced in substantial volumes.
Sivers has already widened its development work around the same material system. A separate programme with SemiNex covers external InP laser sources for co-packaged optics, high-channel-count DFB arrays, and semiconductor optical amplifiers.
That programme is expected to move through customer sampling and early production activity during the second half of 2027, placing its development timetable close to the period when the Glasgow expansion is scheduled to become operational.
The overlap gives Sivers a route to bring additional internal manufacturing capacity online as newer products move through qualification. It also reduces the risk that a successful optical design reaches a customer production decision before the supplier has enough qualified capacity to support it.
The figure of more than 100 million lasers annually remains a capacity target, rather than disclosed contracted demand. Sivers says customer engagement is increasing and programmes are advancing towards higher volumes, but it has not announced orders covering the full eventual output of the expanded Glasgow operation.
Converting installed equipment into qualified capacity will involve more than increasing wafer throughput. Optical devices are sensitive to wavelength accuracy, output power, material uniformity, ageing, thermal performance, yield, and packaging alignment, so each production increase has to maintain device consistency as volumes rise.
The hybrid manufacturing structure is intended to provide more than one route to scale. Internal production can retain control over core InP process knowledge, while external foundry and packaging partners provide additional capacity and geographic flexibility.
Using several manufacturing routes introduces its own qualification burden. Customers will expect equivalent performance from every approved source, placing pressure on process transfer, test correlation, material control, and packaging consistency across the network.
The investment therefore establishes manufacturing headroom rather than confirming that AI optical-interconnect demand has already reached the planned output level. The more informative milestones will be equipment installation, process qualification, customer sampling, and repeat production orders.
If those arrive on schedule, Glasgow will become a substantially larger part of Sivers’ production network during 2027. The expansion is being made before the full customer ramp is visible — a familiar semiconductor manufacturing calculation in which insufficient capacity is expensive, but unused capacity is hardly free.
