a brief introduction to photonics
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IPAS Institute for Photonics & Advanced Sensing. A brief introduction to Photonics. Associate Professor David Lancaster [email protected]. Photonics: the technology of light. www.ipas.edu.au. Photonics controls, uses and manipulates light - PowerPoint PPT PresentationTRANSCRIPT
LIGHT-MATTER INTERACTIONS IN NOVEL OPTICAL FIBRES
IPAS Institute for Photonics & Advanced SensingA brief introduction to PhotonicsAssociate Professor David Lancaster
[email protected]: the technology of lightwww.ipas.edu.au
Photonics controls, uses and manipulates light
Photonics is made up of many different technologies: optics, quantum electronics, lasers, detectors, fibres, materials
Photonics is essentially photon engineering
Electronics revolutionized the 20th century, photonics is doing the same in the 21st
2LightThe natural agent that stimulates sight and makes things visible (the web)
Lightwww.ipas.edu.auLight is energy
Light is electromagnetic radiation
Light has both wave-like and particle-like properties
Light interacts with materials and structures
4Light Amplification by Stimulated Emission of Radiation
Full mirrorPartial mirrorLaser medium
LASER processExcited levelGround levelAtom in excited levelE = h c / Incident photonBeforeemissionDuringemissionAfteremissionE1E2h : Plancks constant6.626 x 10 -34 j.sc : speed of light
LasermirrorsPump light
Daniel Colladon first described this "light fountain" or "light pipe" in an 1842 article entitled On the reflections of a ray of light inside a parabolic liquid stream. Light guide = optical fibreModern fibres guide light by total internal reflection in ultra-pure glass fibres
World fibre production is 24 million kms/ year
Some Photonics applicationsData storage
The internet
Fibre sensors
Laser radars
Laser machining
Defence
Molecular sensing
Fibre sensors
Chemical detection fibre fuel quality sensor hydrogen peroxide monitor in human eggs125 m fibre (human hair width)< 4 m coreAllows light to travel in core (on a light rail !)Light interacts with outside environment
A smart wine bung
Laser radar - Maptek
Laser machining
JSF IR imaging
13
91 Day Lunar-Mars Life Support Test ProjectThis was the third phase of testing of regenerative life support systems which included a crew of four volunteers living in an air tight chamber environment for 91 days. This work at the Johnson Space Center is in preparation for possible human expeditions away from Earth orbit.Phase I of the Lunar-Mars Life Support Test Project began on Sept. 19, 1997. This phase used a combination of physical, mechanical, chemical and biological methods to recycle all the air and water used by the crew and to use plants grown in a connecting chamber to provide some of their food. Regenerative life support is a critical enabling technology for future space missions, since astronauts cannot carry all the supplies necessary to support a trip to Mars or an extended stay on a base on the Moon.Development of an automated multi-component gas sensor
Developed by D. Richter, D.G. Lancaster, F.K. Tittel
= 643nm16