The procedure, described today in the journal Optics Express, cuts the production time of hollow-core optical fibres from around a week to a single day, reducing the overall cost of fabrication.
Initial tests show that the fibre is also superior in virtually every respect to previous versions of the technology, making it an important step in the development of new technologies that use light instead of electrical circuits to carry information.These technologies include faster optical telecommunications, more powerful and accurate laser machining, and the cheaper generation of x-ray or ultra-violet light for use in biomedical and surgical optics.
“This is a major improvement in the development of hollow-core fibre technology,” said Professor Jonathan Knight from the Centre for Photonics & Photonic Materials in the Department of Physics at the University of Bath.
“In standard optical fibres, light travels in a small cylindrical core of glass running down the fibre length.
“The fact that light has to travel through glass limits them in many ways. For example, the glass can be damaged if there is too much light.
“Also, the glass causes short pulses of light to spread out in a blurring effect that makes them less well defined. This limits its usefulness in telecommunications and other applications.
“Hence, fibres in which light travels in air down a hollow core hold great promise for a next generation of optical fibres with performance enhanced in many ways.”
The problem in developing hollow-core fibres is that only a special sort of optical fibre can guide light down an air hole. They use a two-dimensional pattern of tiny holes in the glass around the core to trap the light within the core itself.
The highly detailed nature of these fibres means that they have been difficult to fabricate and they can only work for a limited range of wavelengths.However, the new procedure developed by the Bath photonics group shows how a tiny change to these fibres – narrowing the wall of glass around the large central hole by just a hundred nanometres (a 10 millionth of a metre) – broadens the range of wavelengths which can be transmitted.
They achieved this by omitting some of the most difficult steps in the fabrication procedure, reducing the time required to make the fibres from around a week to a single day.
The improved fibre was developed as part of a European Commission-funded Framework 6 project ‘NextGenPCF’ for applications in gas sensing.
However, the superior performance of the fibre means that it could have a significant impact in a range of fields such as laser design and pulsed beam delivery, spectroscopy, biomedical and surgical optics, laser machining, the automotive industry and space science.
“The consequences of being able to use light rather than electrical circuits to carry information will be fundamental,” said Professor Knight.“It will make optical fibres many times more powerful and brings the day when information technology will consist of optical devices rather than less efficient electronic circuits much closer.
“For biomedical research, we can use these fibres to deliver light for diagnosis or surgery anywhere – even deep inside the body.
“Almost any device where light is important or can be used, photonic crystal fibres can make more efficient, sensitive and powerful.”
Andrew McLaughlin | alfa
AI and high-performance computing extend evolution to superconductors
27.05.2019 | DOE/Argonne National Laboratory
'Neural Lander' uses AI to land drones smoothly
27.05.2019 | California Institute of Technology
Researchers from Sweden's Chalmers University of Technology and the University of Gothenburg present a new method which can double the energy of a proton beam produced by laser-based particle accelerators. The breakthrough could lead to more compact, cheaper equipment that could be useful for many applications, including proton therapy.
Proton therapy involves firing a beam of accelerated protons at cancerous tumours, killing them through irradiation. But the equipment needed is so large and...
A new assessment of NASA's record of global temperatures revealed that the agency's estimate of Earth's long-term temperature rise in recent decades is accurate to within less than a tenth of a degree Fahrenheit, providing confidence that past and future research is correctly capturing rising surface temperatures.
The most complete assessment ever of statistical uncertainty within the GISS Surface Temperature Analysis (GISTEMP) data product shows that the annual values...
Physicists at the University of Basel are able to show for the first time how a single electron looks in an artificial atom. A newly developed method enables them to show the probability of an electron being present in a space. This allows improved control of electron spins, which could serve as the smallest information unit in a future quantum computer. The experiments were published in Physical Review Letters and the related theory in Physical Review B.
The spin of an electron is a promising candidate for use as the smallest information unit (qubit) of a quantum computer. Controlling and switching this spin or...
Engineers at the University of Tokyo continually pioneer new ways to improve battery technology. Professor Atsuo Yamada and his team recently developed a...
With a quantum coprocessor in the cloud, physicists from Innsbruck, Austria, open the door to the simulation of previously unsolvable problems in chemistry, materials research or high-energy physics. The research groups led by Rainer Blatt and Peter Zoller report in the journal Nature how they simulated particle physics phenomena on 20 quantum bits and how the quantum simulator self-verified the result for the first time.
Many scientists are currently working on investigating how quantum advantage can be exploited on hardware already available today. Three years ago, physicists...
29.04.2019 | Event News
17.04.2019 | Event News
15.04.2019 | Event News
27.05.2019 | Information Technology
27.05.2019 | Physics and Astronomy
27.05.2019 | Life Sciences