NPL scientists stabilize laser frequency with novel cavity

Scientists at NPL have achieved a breakthrough in laser frequency stabilization, reaching unprecedented performance levels using an optical reference cavity. This advancement promises more stable lasers. The researchers developed a 68 cm optical reference cavity with a record 300-microsecond optical storage time. They also implemented a novel technique to actively cancel stabilization noise, specifically Residual Amplitude Modulation. This research will improve optical clocks and impact fields like timekeeping and telecommunications. The team's work enables the development of more precise measurement tools.