Stanford researchers develop low-power optical amplifier with 100x signal boost

Thu, 07 May 2026 05:53:00 +0200

Researchers at Stanford University have developed a compact optical amplifier capable of boosting light signals by up to 100 times while consuming only a few hundred milliwatts of power. Optical amplifiers are essential components in modern technologies such as fiber-optic communications, sensors, and photonic systems, but traditional compact versions often require significant energy, limiting their efficiency and integration into small devices. The new design overcomes these limitations by recycling energy within a resonant structure.

The device operates by circulating light within a looped resonator, allowing the energy of a “pump” beam to build up over time. This process, described as an energy recycling mechanism, enables stronger amplification without increasing input power. The approach is similar to how light behaves in laser systems, where repeated passes enhance intensity. As a result, the amplifier maintains high performance while remaining energy efficient.

In addition to