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The sensitivity of FOGs can be enhanced by increasing the distance the light travels, for example by sending the light down a longer fibre-optic cable. This, in turn, shows how the gyroscope (or the vehicle upon which it is mounted) changed its orientation. This path-shortening phenomenon is known as the Sagnac effect, and when the two light beams are made to interfere, their interference signal can be used to calculate the difference in path length. If the reference frame of the beams is not inertial – that is, if the gyroscope is rotating – the beam travelling counter to the direction of the rotation will experience a slightly shorter path. If optimized, devices based on these so-called nodeless anti-resonant fibres could find use in next-generation civil navigation systems.įibre-optic gyroscopes (FOGs) rely on a pair of laser beams travelling in opposite directions around the same fibre-optic coil. (Courtesy: Gregory T Jasion, Optoelectronics Research Centre, University of Southampton)Ī new type of hollow-core optical fibre makes light-based gyroscopes up to 500 times more stable by eliminating sources of noise. Webinars Tune into online presentations that allow expert speakers to explain novel tools and applicationsĪ nodeless antiresonant fibre.Video Watch our specially filmed videos to get a different slant on the latest science.Podcasts Our regular conversations with inspiring figures from the scientific community.Audio and video Explore the sights and sounds of the scientific world.Supercool physics Experiments that probe the exotic behaviour of matter at ultralow temperatures depend on the latest cryogenics technology.The science and business of space Explore the latest trends and opportunities associated with designing, building, launching and exploiting space-based technologies.Revolutions in computing Find out how scientists are exploiting digital technologies to understand online behaviour and drive research progress.
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