Title: Painfree efficient and precise laser ablation of dental decay using a femtosecond laser
1- - Pain-free efficient and precise laser ablation
of dental decay using a femtosecond laser - Projects investigating acid resistance of laser
treated teeth and dental handpiece - development
Ablated craters in teeth, different power and
pulses
Femtosecond-pulsed laser sources cause minimal
damage to surrounding tooth material with
potential for highly precise treatment of dental
caries.
A portion of a tooth ablated by the femtosecond
laser. Note the sharp edge and minimal surface
damage.
2- Use a crystalline laser to produce microwaves
- Two optical frequencies are generated in the
laser as the optical carrier waves - the microwaves are obtained by mixing the
optical signals - The interaction of the two optical frequencies
in the laser material controls the - efficiency of the process
3MACQUARIE UNIVERSITY, DEPARTMENT OF
PHYSICS RESEARCH Random Lasers
-
- Maybe a laser doesnt have to have two mirrors
with a gain material in between - Random lasers use laser materials with lots of
particles to scatter the light in random
directions - These can produce lasers within very thin films
and with random directions - We are coupling these with surface plasmons to
improve propagation of surface plasmons
A/Prof Judith Dawes,Judith_at_ics.mq.edu.au, Tel
02 9850 8903ARC Centre of Excellence
(CUDOS_at_MQ)Centre for Lasers and Applications,
Department of Physics
4- Crystals grown in a furnace from molten
mixtures, creating a thin - waveguide on the crystal
- These can guide light and provide opportunities
for optical signal - processing
5MACQUARIE UNIVERSITY, DEPARTMENT OF
PHYSICS RESEARCH Opals
- Opals are examples of 3D photonic crystals which
can control the propagation - of light in every direction
- We are combining opals with optical fibres and
with waveguides to create new - types of photonic devices to control and guide
light
A/Prof Judith Dawes,Judith_at_ics.mq.edu.au, Tel
02 9850 8903ARC Centre of Excellence
(CUDOS_at_MQ)Centre for Lasers and Applications,
Department of Physics