MACQUARIE UNIVERSITY, DEPARTMENT OF PHYSICS

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MACQUARIE UNIVERSITY, DEPARTMENT OF
PHYSICS RESEARCH Ultrashort laser pulses
Lasers using Titanium doped Sapphire crystals and
so-called chirped dielectric mirrors are capable
of generating optical pulses only a few
femtoseconds (10-15 s) in duration.
Age of Australia
The ratio of 10 fs to 1 min is equal to the ratio
between 1 min and the age of our universe
Dr Alexander Fuerbach,Fuerbach_at_ics.mq.edu.au,
Tel [phone]Department of Physics
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MACQUARIE UNIVERSITY, DEPARTMENT OF
PHYSICS RESEARCH Integrated fibre lasers
Every laser consists of a gain medium and a
resonator formed by a partially reflecting mirror
and a 100 reflecting mirror.
While the partially reflecting mirror is
automatically formed by Fresnel reflection off
the fibre end facet, we directly inscribe a
highly frequency selective 100 mirror into the
other end of the fibre using femtosecond laser
pulses
Dr Alexander Fuerbach,Fuerbach_at_ics.mq.edu.au,
Tel [phone]Department of Physics
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MACQUARIE UNIVERSITY, DEPARTMENT OF
PHYSICS RESEARCH High power narrow linewidth
lasers
With this simple concept we generate spectrally
extremely narrow radiation at power levels in
excess of 100 W
High power fibre laser glowing green due to
co-coperative upconversion of the Yb-ions and
blue as a result of upconversion in the polymer
cladding.
Dr Alexander Fuerbach,Fuerbach_at_ics.mq.edu.au,
Tel [phone]Department of Physics
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MACQUARIE UNIVERSITY, DEPARTMENT OF
PHYSICS RESEARCH High energy femtosecond
oscillators
The cavity of a femtosecond laser can be extended
to an effective length of up to 50 m using so
called Herriot multipass cells
With this trick, the energy per pulse can be
increased to values high enough for material
processing applications
Dr Alexander Fuerbach,Fuerbach_at_ics.mq.edu.au,
Tel [phone]Department of Physics
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MACQUARIE UNIVERSITY, DEPARTMENT OF
PHYSICS RESEARCH Femtosecond pulse compression
in speciality fibres
Long input pulses
Ultrashort pulses after a 10 cm long piece of
Photonic crystal fibre
Dr Alexander Fuerbach,Fuerbach_at_ics.mq.edu.au,
Tel [phone]Department of Physics