Hollow antiresonant fibres for visible and ultraviolet beam delivery

用于可见光和紫外光束传输的空心反谐振光纤

• 批准号: EP/M025381/1
• 负责人: Jonathan Knight
• 金额: $ 43.98万
• 依托单位: University of Bath
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2015
• 资助国家: 英国
• 起止时间: 2015 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FM025381%2F1
• 关键词: Hollow; antiresonant; fibres; visible; ultraviolet

Hollow core optical fibres guide light in a hollow (usually, gas-filled) core rather than in a solid glass core as in all conventional fibres. The use of a hollow core means that many of the constraints on optical fibre performance which are due to the properties of the core material are lifted (often by many orders of magnitude) and the fibres can by far outperform their more familiar conventional counterparts. There is a problem, however: how can you trap light in a hollow core? Substantial effort has been put into developing so-called photonic bandgap fibres over the last 20 years. These fibres rely on a complex cladding structure to trap light in the hollow core with low losses. They have been developed to a high degree but have been held back by some apparently insurmountable practical problems. These have especially constrained their performance at the short wavelengths which are important in many applications such as high precision laser machining and materials modification. The state-of-the-art laser systems can now deliver the necessary radiation for these applications: however, a truly flexible delivery system does not currently exist. This ability to deliver the pulsed laser light flexibly from the laser system to the point of application is a key advance required to develop practical and commercially viable applications.Over the last eighteen months, researchers in this collaboration and at a couple of other laboratories across Europe have demonstrated that a much simpler fibre design can actually be far more effective than the bandgap fibres. This is especially true at long wavelengths (in the mid-infrared) and at short wavelengths (eg 1 micron wavelength and below.) Numerical simulations now suggest that these designs can be extended to offer the possibility of their outperforming any existing optical fibres at almost any optical wavelength.This proposal is to demonstrate these fibres at a range of short wavelengths and to work with four UK-based companies to establish them as useful in manufacturing and clinical environments. This involves making fibres with several designs, verifying their performance, identifying the barriers to their use and overcoming them, and then working in the laboratories of our collaborators to establish them as useful on the factory floor and also in medical and engineering measurements. Along the way, we aim to demonstrate the lowest-loss optical fibre ever (at a longer wavelength) and to investigate whether these designs can be extended to deliver laser beams with low beam quality.

空芯光纤在空芯（通常是充气的）中引导光，而不是像所有传统光纤那样在实心玻璃芯中引导光。使用空芯意味着由于芯材料的性质而对光纤性能的许多限制被解除（通常是许多数量级），并且光纤可以远远超过它们更熟悉的常规对应物。然而，有一个问题：如何将光捕获在空心中？在过去的20年里，人们已经投入了大量的精力来开发所谓的光子带隙光纤。这些光纤依赖于复杂的包层结构，以低损耗的方式将光捕获在中空芯中。它们已经发展到很高的程度，但受到一些显然无法克服的实际问题的阻碍。这些特别限制了它们在短波长下的性能，这在许多应用中是重要的，例如高精度激光加工和材料改性。最先进的激光系统现在可以为这些应用提供必要的辐射：然而，目前还不存在真正灵活的传输系统。这种将脉冲激光从激光系统灵活地传输到应用点的能力是开发实用和商业可行应用所需的关键进步。在过去的18个月里，该合作项目的研究人员以及欧洲其他几个实验室的研究人员已经证明，一种简单得多的光纤设计实际上比带隙光纤更有效。这在长波长（中红外）和短波长（例如1微米波长及以下）下尤其如此。数值模拟现在表明，这些设计可以扩展到提供他们的性能优于任何现有的光纤在几乎任何optical wavelength.This建议的可能性是在短波长范围内展示这些纤维，并与四家英国公司建立他们在制造和临床环境中有用。这涉及到制造具有多种设计的纤维，验证其性能，确定其使用的障碍并克服它们，然后在我们合作者的实验室中工作，以确定它们在工厂车间以及医疗和工程测量中的有用性。沿着的方式，我们的目标是展示有史以来最低损耗的光纤（在更长的波长），并研究这些设计是否可以扩展到提供低光束质量的激光束。

项目成果

Measurement of resonant bend loss in anti-resonant hollow core optical fiber: erratum.

反谐振空芯光纤谐振弯曲损耗的测量：勘误表。

• DOI: 10.1364/oe.489024
• 发表时间: 2023
• 期刊: Optics express
• 影响因子: 3.8
• 作者: Carter RM

Adaptive Multiphoton Endomicroscope Incorporating a Polarization-Maintaining Multicore Optical Fibre

• DOI: 10.1109/jstqe.2015.2488283
• 发表时间: 2016-05-01
• 期刊: IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
• 影响因子: 4.9
• 作者: Kim, Youngchan;Warren, Sean C.;French, Paul M. W.
• 通讯作者: French, Paul M. W.

Cavity-based mid-IR fiber gas laser pumped by a diode laser

• DOI: 10.1364/optica.3.000218
• 发表时间: 2016-03-20
• 期刊: OPTICA
• 影响因子: 10.4
• 作者: Abu Hassan, Muhammad Rosdi;Yu, Fei;Knight, Jonathan C.
• 通讯作者: Knight, Jonathan C.

Sub parts-per-billion detection of ethane in a 30-meters long mid-IR Antiresonant Hollow-Core Fiber

• DOI: 10.1016/j.optlastec.2021.107638
• 发表时间: 2021-11-10
• 期刊: OPTICS AND LASER TECHNOLOGY
• 影响因子: 5
• 作者: Jaworski, Piotr;Krzempek, Karol;Abramski, Krzysztof
• 通讯作者: Abramski, Krzysztof

Anti-Resonant Hollow Core Fibers

• DOI: 10.1364/ofc.2019.th3e.4
• 发表时间: 2019-03
• 期刊: 2019 Optical Fiber Communications Conference and Exhibition (OFC)
• 作者: J. Knight