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A brief introduction to Photonics

IPAS Institute for Photonics & Advanced Sensing. A brief introduction to Photonics. Associate Professor David Lancaster David.lancaster@adelaide.edu.au. Photonics: the technology of light. www.ipas.edu.au. Photonics controls, uses and manipulates light

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A brief introduction to Photonics

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  1. IPASInstitute for Photonics & Advanced Sensing A brief introduction to Photonics Associate Professor David Lancaster David.lancaster@adelaide.edu.au

  2. Photonics: the technology of light www.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

  3. Light The natural agent that stimulates sight and makes things visible (the web)

  4. Light • Light is energy • Light is electromagnetic radiation • Light has both wave-like and particle-like properties • Light interacts with materials and structures www.ipas.edu.au

  5. Light Amplification by Stimulated Emission of Radiation Laser medium Full mirror Partial mirror

  6. LASER process During emission After emission Before emission Excited level E2 E = h c /  Incident photon E1 Atom in excited level Ground level h : Planck’s constant 6.626 x 10 -34j.s c : speed of light Laser mirrors Pump light

  7. Light guide = optical fibre • 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. • Modern fibres guide light by total internal reflection in ultra-pure glass fibres • World fibre production is 24 million kms/ year

  8. Some Photonics applications • Data storage • The internet • Fibre sensors • Laser radars • Laser machining • Defence • Molecular sensing

  9. Fibre sensors • 125 µm fibre (human hair width) • < 4 µm core • Allows light to travel in core (on a light rail !) • Light interacts with outside environment • Chemical detection fibre • fuel quality sensor • hydrogen peroxide monitor in human eggs

  10. A smart wine bung

  11. Laser radar - Maptek

  12. Laser machining

  13. JSF IR imaging

  14. 91 Day Lunar-Mars Life Support Test Project This 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.

  15. Development of an automated multi-component gas sensor Developed by D. Richter, D.G. Lancaster, F.K. Tittel

  16. = 643nm

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