The Light Wave Oscillates
2021年1月12日 日常With novel crystalline mirror layers and lower temperatures, the disturbing thermal noise can be further reduced. They have attained such perfection in doing so that the only influence left was the thermal motion of the atoms in the resonator. Although the light wave oscillates approx."In the future, it is planned to disseminate this light also within a European network. The laser’s frequency stability – and thus its linewidth – then depends only on the length stability of the Fabry-Pérot resonator.
This new https://www.china-sanity.com/ laser will enable us to decisively improve the quality of our clocks", PTB physicist Thomas Legero explains. For researchers, this is a measure for the light wave's regular frequency and linewidth., the light wave inside the resonator. Ideally, laser light has only one fixed wavelength (or frequency). In practice, the spectrum of most types of lasers can, however, reach from a few kHz to a few MHz in width, which is not good enough for numerous experiments requiring high precision.
At PTB, the ultrastable light from these lasers is already being distributed via optical waveguides and is then used by the optical clocks in Braunschweig. This length corresponds to no more than a ten-millionth of the diameter of a hydrogen atom. Within the scope of a nearly 10-year-long joint project with the US colleagues from JILA in Boulder, Colorado, a laser has now been developed at PTB whose linewidth is only 10 mHz (0. This plan would allow even more precise comparisons between the optical clocks in Braunschweig and the clocks of our European colleagues in Paris and London", Legero says. The results have been published in the current issue of "Physical Review Letters". 200 trillion times per second, it only gets out of sync after 11 seconds.
The core piece of each of the lasers is a 21-cm long Fabry-Pérot silicon resonator. In Boulder, a similar plan is in place to distribute the laser across a fiber network that connects between JILA and various NIST labs. The resonator consists of two highly reflecting mirrors which are located opposite each other and are kept at a fixed distance by means of a double cone. In reality, however, there is always a certain linewidth.
This new https://www.china-sanity.com/ laser will enable us to decisively improve the quality of our clocks", PTB physicist Thomas Legero explains. For researchers, this is a measure for the light wave's regular frequency and linewidth., the light wave inside the resonator. Ideally, laser light has only one fixed wavelength (or frequency). In practice, the spectrum of most types of lasers can, however, reach from a few kHz to a few MHz in width, which is not good enough for numerous experiments requiring high precision.
At PTB, the ultrastable light from these lasers is already being distributed via optical waveguides and is then used by the optical clocks in Braunschweig. This length corresponds to no more than a ten-millionth of the diameter of a hydrogen atom. Within the scope of a nearly 10-year-long joint project with the US colleagues from JILA in Boulder, Colorado, a laser has now been developed at PTB whose linewidth is only 10 mHz (0. This plan would allow even more precise comparisons between the optical clocks in Braunschweig and the clocks of our European colleagues in Paris and London", Legero says. The results have been published in the current issue of "Physical Review Letters". 200 trillion times per second, it only gets out of sync after 11 seconds.
The core piece of each of the lasers is a 21-cm long Fabry-Pérot silicon resonator. In Boulder, a similar plan is in place to distribute the laser across a fiber network that connects between JILA and various NIST labs. The resonator consists of two highly reflecting mirrors which are located opposite each other and are kept at a fixed distance by means of a double cone. In reality, however, there is always a certain linewidth.
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