Applied Optoelectronics Demonstrated 3GHz Amplifier

The prototype device aims to support future cable network speeds reaching 25 Gbit/s.

Updated on Sept. 28, 2026 in Telecommunications

Applied Optoelectronics Demonstrated 3GHz Amplifier

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Applied Optoelectronics Inc. has demonstrated a new 3GHz amplifier prototype at the SCTE TechExpo in Atlanta. The technology is designed to enable HFC networks to reach potential downstream speeds of 25 Gbit/s.

Why it matters

Operators are seeking new technologies to expand network capacity, and this prototype proves that generating and amplifying 3GHz signals is technically feasible. Higher frequencies will be critical for scaling broadband performance to meet future consumer data demands.

The prototype targets 3GHz performance, which supports downstream speeds of 25 Gbit/s. Using 1.8GHz spacing at 3GHz would require 50 times the current power and result in 1 kilowatt of heat dissipation.

The players

Applied Optoelectronics Inc.

This company is a leading provider of advanced optical devices and networking equipment.

CableLabs

This non-profit research and development consortium develops technologies for the global cable industry.

Qorvo

This corporation specializes in the design and manufacture of radio frequency semiconductors.

Mini-Circuits

This company manufactures components and integrated assemblies for radio frequency and microwave applications.

The details

The demonstration utilized a signal generator to transmit QAM and OFDM signals up to 3GHz through the proof-of-concept device before measurement by a spectrum analyzer. The prototype integrates semiconductors from Qorvo and Mini-Circuits to handle the increased frequency demands.

Development of 1.8GHz devices began in 2019.
Development of 1.8GHz devices solidified in 2025.
Mini-Circuits acquired Analog Devices cable amplifier business in 2024.
The 3GHz prototype was demonstrated during the week of September 28, 2026.

Roadmap

This prototype aligns with industry standards established by ANSI/SCTE 264 for tap housings and ANSI/SCTE 265 for passive housings. It reflects the broader transition toward 3GHz architectures as the next evolutionary step following 1.8GHz, requiring new silicon for heat management.

The development of 3GHz-capable networks aims to provide consumers with significant increases in downstream data speeds. While deployment will take several years, this technology is essential for the future delivery of 25 Gbit/s broadband service to residential homes.

The takeaway

Advancing to 3GHz frequencies requires significant innovation in semiconductor efficiency to manage extreme heat and power constraints. Future network deployments will likely depend on new distributed booster amplifiers located near taps to maintain signal integrity.