Department of Physics
Fibre optics
Interested in conducting research in Fibre Optics? You can find out more about our research and who to contact here.
Due to the small core size and the large refractive index difference between core and cladding these fibres are ideal to observe nonlinear effects. In our research we utilise mainly the effect of modulation instability (MI) to generate new optical frequency components, ie, we are able to convert red light into blue light. Utilising MI as nonlinear effect has two advantages: using different kinds of MI one can utilise different parts of the visible spectrum and by tuning the pump laser over a very small range the newly generated frequency components will be tuned over a very wide range.
For more information on the research area above, please contact:
Associate Professor Rainer Leonhardt
Phone: +64 9 373 7599 ext 88835
Email: r.leonhardt@auckland.ac.nz
Visit the profile of Associate Professor Rainer Leonhardt.
Or:
Doctor Stuart Murdoch
Phone: +64 9 373 7599 ext 85871
Email: s.murdoch@auckland.ac.nz
Visit the profile of Doctor Stuart Murdoch.
Or:
Professor J.D. Harvey
Phone: +64 9 373 7599 ext 88831
Email: j.harvey@auckland.ac.nz
Visit the profile of Professor J.D. Harvey.
These fibres have the potential be used in applications (eg, local networks) and in research (eg, nonlinear effects). The microstructures can be either used to tailor the refractive index across the core (Graded Index fibres, (GRIN)) or to achieve a high level of confinement in a core of very small dimension. One of the biggest problems to overcome is the poor coupling efficiency of laser light into the fibre. With the development of a new fibre cleaver this problem has been largely solved. Some of the GRIN fibres have already shown that the effect of modal dispersion can be greatly reduced with such fibres. With the fibres that have the small core size, the problems encountered relate to the uniformity of the fibre over a long length. The manufacturer has now taken steps to improve the uniformity.
For more information on the research area above, please contact:
Associate Professor Rainer Leonhardt
Phone: +64 9 373 7599 ext 88835
Email: r.leonhardt@auckland.ac.nz
Visit the profile of Associate Professor Rainer Leonhardt.
Or:
Professor J.D. Harvey
Phone: +64 9 373 7599 ext 88831
Email: j.harvey@auckland.ac.nz
Visit the profile of Professor J.D. Harvey.
More work has been done within the framework a Marsden grant project dedicated to stimulated Raman scattering in fibres. In particular, the ultra-high repetition rate pulsed Raman laser demonstrated at the end of last year has been greatly improved, and results have been presented at an international conference and published in a high-level peer review journal. More systematic measurements have also been done on our noise measurements project, and we are about to publish these.
Complementary work on this subject has also been performed on the review paper written with some collaborators at the end of last year on supercontinuum generation.
For more information on the research area above, please contact:
Doctor Stéphane Coen
Phone: +64 9 373 7599 ext 88841
Email: s.coen@auckland.ac.nz
Or visit the profile of Doctor Stéphane Coen.
- Optical fiber parametric amplifiers and oscillators
- Nonlinear optics in photonic crystal fibers
- Applications of nonlinear fiber optics to nonlinear spectroscopy
For more information on the research area above, please contact:
Doctor Stuart Murdoch
Phone: +64 9 373 7599 ext 85871
Email: s.murdoch@auckland.ac.nz
Or visit the profile of Doctor Stuart Murdoch
