Catenaa, Saturday, March 07, 2026- Researchers at Stanford University have developed a fingertip-sized optical amplifier capable of increasing light intensity by roughly 100 times while consuming just a few hundred milliwatts of power.
The device maintains low noise levels and supports a broad optical bandwidth, making it suitable for integration into laptops, smartphones, and other compact systems.
The amplifier uses energy recycling within a resonator to enhance signal strength efficiently. Light from a “pump” beam circulates in a racetrack-like loop inside the resonator, intensifying as it travels and amplifying the target signal.
This design allows the device to achieve strong amplification without significantly increasing energy consumption.
According to the researchers, the chip’s compact dimensions and low power requirements open the door to battery-powered optical systems that were previously impractical.
Its broad bandwidth and low-noise operation enable higher data capacity and reduced interference, making it suitable for applications in data communications, biosensing, and novel light sources.
Devin Dean, a co-first author and doctoral student, said the system’s energy recycling approach significantly improves efficiency without compromising other performance characteristics.
The team’s design builds on principles used in lasers, reflecting light repeatedly to strengthen the signal.
The device was described in Nature on January 28, 2026, and the work received support from DARPA, NTT Research, and the National Science Foundation.
The Stanford team said mass production of these chip-scale amplifiers could enable next-generation optical technologies that are low-power, versatile, and portable.
