Photonic Crystal Fibres
Photonic Crystal Fibres (PCF) are micro-structured optical fibres that guide light by modifying the optical index of the modes via wavelength-scale holes or glass elements that run along the entire length of the fibre. There are two basic types: Solid-core fibres, where light is predominately confined in glass and is guided by total internal reflection, and hollow-core fibres, where the vast majority of the light propagates in an empty core, guided by resonant phenomena.
Due to the small overlap of the electromagnetic field with glass (typically << 0.01 % of the fundamental mode), our hollow-core fibres open up entirely new applications, including the delivery of high-power pulses from IR to DUV at wavelengths where the glasses used are opaque or prone to optical damage.
Hollow-core fibres can be filled with gases or liquids. The practically unlimited interaction length between the optical field and these fluids makes it possible to exploit non-linear effects that are usually too weak to be usable. Non-linear effects in noble gas and Hydrogen are employed for example in ultralumina’s light sources for spectral broadening to create supercontinuum radiation into the DUV or femtosecond pulses.
We offer a range of standard Photonic Chrystal Fibres, and we can help you design, fabricate and test custom fibres for your application, or support you in the development of complete optical systems.
Example of an Endlessly Single-mode (ESM) PCF. These fibres provide robust single-mode guidance for all wavelengths in which the fibre guides with low loss. A high damage threshold, and ultralow nonlinearity and dispersion make these fibres an attractive option for applications like high-power femtosecond beam delivery, non-linear optics or UV applications. Core diameters from 25 – 60 µm are available on request.
Please contact us for additional information.