AOI (Applied Optoelectronics) has shipped its 1 millionth 1.8GHz amplifier, a milestone the optical transmission vendor disclosed at SCTE TechExpo 2026 during a 13-minute video interview with Light Reading senior editor Jeff Baumgartner.

Stefan Murry, representing AOI at the show, framed the shipment figure as evidence that DOCSIS 4.0 plant upgrades have moved from field trials to volume rollout. The 1.8GHz amplifier sits at the center of cable operators' mid- and high-split transitions, letting more usable spectrum pass through existing hybrid fiber-coaxial (HFC) plant.

What does the 3.0GHz roadmap involve?

Murry discussed the engineering work AOI has begun on amplifiers and passives capable of carrying spectrum up to 3.0GHz, beyond the current 1.8GHz ceiling defined for DOCSIS 4.0. The conversation took place on the show floor at SCTE TechExpo 2026.

The work targets a generational jump past today's DOCSIS 4.0 frequency limits, where CableLabs and operator members have weighed higher-frequency extensions as a way to multiply capacity without rebuilding coax. Murry did not name operator trials for the 3.0GHz components.

Why is the 1 million-amplifier mark significant?

Reaching seven-figure shipments of a 1.8GHz amplifier family signals that the DOCSIS 4.0 supply chain has scaled. It also confirms that MSOs are replacing legacy 1.2GHz actives in volume, a prerequisite for any future move past 1.8GHz.

Cable operators are spending heavily on DOCSIS 4.0 to defend against fiber-to-the-home (FTTH) overbuilders and fixed wireless access (FWA) competition. A million-unit shipment by a specialist vendor indicates that mid- and high-split upgrades have become a sustained, multi-year build cycle rather than a niche experiment.

Where does QuantumLink fit?

QuantumLink, AOI's AI-driven operations layer, was a second focus of the interview. Murry described QuantumLink as a tool that ingests telemetry from amplifiers and nodes to flag impairments before they reach subscribers.

He positioned the platform as a complement to AOI's 1.8GHz amplifier family and as a way to reduce truck rolls by surfacing signal-degradation, return-path noise, and power-supply anomalies. The interview did not disclose operator deployment counts for QuantumLink.

What are the standards and regulatory angles?

The 1.8GHz and prospective 3.0GHz amplifier generations rely on the extended spectrum boundaries CableLabs has codified for DOCSIS 4.0. No FCC action is required for cable operators to deploy higher-frequency actives on their own plant, but mid-band spectrum sharing rules can shape which upstream bands MSOs allocate for DOCSIS 4.0 in certain markets.

AOI's roadmap therefore tracks CableLabs' specification work closely. Any move past 1.8GHz in commercial volumes depends on the standards body completing a follow-on specification, which Murry did not address directly.

What's next for AOI?

The interview pointed to continued 1.8GHz amplifier shipments at current volumes while AOI prototypes 3.0GHz-compatible components. The company has not set a production date for the higher-frequency equipment.

Murry's SCTE TechExpo appearance suggests AOI intends to be ready when operators make the next HFC refresh decision. If the cable industry follows the cadence it used for the 1.2GHz-to-1.8GHz transition, a 3.0GHz commercial cycle could begin to take shape within the next two to three years, contingent on CableLabs' post-DOCSIS 4.0 specifications and operator capex plans.