Holey Fibers

Suchita Kaundin

Agenda

Background What are Holey Fibers Physical Structure Fabrication Properties Advantages Applications Industries References

Background

Initially, the photonic bandgap was the only guiding mechanism in the new class of optical fibers

By micro structuring and including airholes in the fiber and using total internal reflection property, these devices could provide revolutionary features

                                                            

                                                    

What are Holey Fibers

Holey Fibers are microstructured optic fibers that possess a solid core surrounded by a cladding region defined by a fine array of air holes that extend along the fiber length

Holey fibers guide light due to effective refractive index difference between core and cladding regions and can be made from a single material typically silica

Physical Structure

Holey fibers are created by stacking tiny hollow glass tubes around a small solid glass rod forming a cylinder 3cm across and a meter long

Each hole can be less than a micron in diameter The positioning and size of the hole affect the way

light is being transmitted By introducing holes which are of a similar size to the

wavelength of light, light of different wavelengths can be passed.

Fabrication

Fabricated by stacking an array of capillaries in a hexagonal configuration around a solid rod which forms the core

The resulting preform is reduced to fibre dimensions using a conventional fibre drawing tower

A range of fiber profiles can be produced from a single preform by controlling the conditions under which the fiber is drawn

For large scale reduction factors for certain applications the microstructured region may be overclad with a solid jacket

Properties

Endless single mode guidance Large mode area Non linearity tailoring Dispersion

Advantages

Endlessly single mode operation- Short wavelength applications

Large mode area up to hundreds of μm2- Makes fabrication process faster

Anomalous and zero dispersion below 1.3 μm (at visible)- Makes generation of optical solitons in the near IR and visible regions.

Applications

Applications in electronic equipments, multiplexers, computers, video devices, Vehicle control systems where high speed optical data transfer is essential

Can enable powerful laser surgery and effective laser machining

Optical switches and sensor applications Pollution sensing: Putting the fiber into a liquid or

driving gas through it and then seeing how light shone through the fiber is affected could give fast and accurate information about pollutant characteristics

Industries

Corning Inc. BlazePhotonics design Crystal Fiber INO Omniguide Communications

References

Holey Fibers : Properties,Applications & Future Directions

by Optoelectronics Research Centre,University of Southampton

http://fibers.org/articles/news/5/4/1/1 http://www.opticallynetworked.com/features/article.php/7240

61 http://www.ecpe.vt.edu/news/ar03/holeyfib.html http://www.lightreading.com/document.asp?doc_id=21449

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