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Master assignment IOMS group, University of Twente Fabrication and Characterization of a Hollow-core Integrated Optical Waveguide
 

Summary: Master assignment IOMS group, University of Twente
1
Fabrication and Characterization of a Hollow-core Integrated Optical Waveguide
Expected Student Candidate : electrical engineering or applied physics student
Supervisors : H.P. Uranus, G. Sengo, M. Hoekman, H.J.W.M. Hoekstra
Background
Can we "guide" light in an air core? Can we make a chip of such hollow-core waveguide? In text
books of optical waveguide theory, we learn that guiding of light requires a high index core
surrounded by low index claddings in order to be able to keep the light within the core using the
total internal reflection mechanism. However, using different principles, we can also up to some
extend keep the light within a low index core [1-8]. This is very interesting as if we are able to
keep the light within a hollow core (core consist of air), we can make devices with very low
temperature sensitivity, low dispersion, and high damage threshold. Moreover, we can fill the
hollow core with gases or liquids and perform interesting light-matter experiments. This is
particularly interesting for applications like non-linear optics of gases/liquids, sensing,
spectroscopy, light-driven biological/chemical processes, as well as telecommunication.
However, up to now, the demonstrated hollow core waveguide have a rather large loss [1-
5] ranging from few dB/cm to few tens of dB/cm. Besides the technological challenge in its
fabrication, theory on how to tweak the structure to get a theoretically low loss waveguide is also
interesting. Recently, an air-core integrated optical structure with very low theoretical loss was

  

Source: Al Hanbali, Ahmad - Department of Applied Mathematics, Universiteit Twente

 

Collections: Engineering