Scientists at NPL have demonstrated the best-reported laser frequency stability achieved with an optical reference cavity operating at room temperature, marking a major advance in ultrastable laser ...

Recently, a research team led by Prof. Guo Guangcan from the University of Science and Technology of China (USTC) demonstrated nonreciprocal routing between any two modes with different frequencies ...

The serrodyne principle enables an electromagnetic signal to be frequency shifted by applying a linear phase ramp in the time domain. This phenomenon has been exploited to frequency shift signals in ...

Beyond the use of optical frequency combs as precision clock sources in the optical region, researchers have developed a way ...

Optical-frequency combs (OFCs) provide a phase-coherent link between the optical and microwave domains and are a foundation for metrology applications such as optical synthesizers 8,9 and distance ...

Researchers developed a frequency-comb-referenced terahertz Fabry-Pérot interferometry platform that measures lithium-ion ...

Optical frequency comb technology and its capability to directly measure and convert optical frequencies has revolutionized the field of high-precision metrology. While it is enabling novel ...

It may seem at times that there is a divide between the optical/photonic domain and the RF one, with the terahertz zone between them as a demarcation. If you need to make a transition between the ...

There are significantly different architectures for what are known as “atomic” clocks. Optically driven atomic clocks offer a new set of performance attributes. The optical atomic clocks use paired ...

A tunable metasurface can control optical light in space and time, offering a path toward new ways of wirelessly and securely transmitting large amounts of data both on Earth and in space. It is a ...