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Octave-Spanning Optical Ruler Is Precisely Tunable

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GARCHING, Germany, Aug. 30, 2011 — Max Planck Institute of Quantum Optics (MPQ) scientists succeeded in generating optical frequency combs using chip-based quartz glass toroids with diameters on the micrometer scale. Taking it a step further, they have now created microresonators that can produce light over a range of more than an octave and are at the same time precisely tunable. This achievement brings a variety of applications into reach, such as optical telecommunications, miniaturization of photonic devices, or the precise calibration of spectrographs in astrophysics. Octave-spanning frequency comb generation in a...Read full article

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    Published: August 2011
    Glossary
    metrology
    Metrology is the science and practice of measurement. It encompasses the theoretical and practical aspects of measurement, including the development of measurement standards, techniques, and instruments, as well as the application of measurement principles in various fields. The primary objectives of metrology are to ensure accuracy, reliability, and consistency in measurements and to establish traceability to recognized standards. Metrology plays a crucial role in science, industry,...
    nano
    An SI prefix meaning one billionth (10-9). Nano can also be used to indicate the study of atoms, molecules and other structures and particles on the nanometer scale. Nano-optics (also referred to as nanophotonics), for example, is the study of how light and light-matter interactions behave on the nanometer scale. See nanophotonics.
    octave
    In optics, an octave typically refers to a range of frequencies or wavelengths that spans a factor of 2. In other words, when dealing with optics, an octave encompasses a doubling of frequency or halving of wavelength. For example, if you have light with a certain wavelength, the range from that wavelength to twice that wavelength would be considered one octave. Similarly, the range from that wavelength to half of that wavelength would also be one octave. The concept of octave is commonly...
    spectral line
    A narrow range of emitted or absorbed wavelengths.
    astrophysicsCommunicationsdiode lasersEuropeGermanyglass nanowireglass toroidsLight SourcesMax Planck Institute of Quantum OpticsmetrologymicroresonatorMicroscopymonolithic frequency combnanooctaveoctave spanningoptical frequency comboptical telecommunicationsOpticsphotonic devicesResearch & Technologyshort-pulse laserspectral linespectrographsspectrum of colorTest & MeasurementTheodor W. HänschLasers

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