Donna Strickland

Guelph-Waterloo Physics Institute (GWPI)Department of Physics and Astronomy

University of Waterloo

System layout

r

Argon Ion Laser

Ti:sapphire rodOscillator

Stretcher

gratingmirror

Regenerative amplifierFrequency doubled 10Hz, Nd:YAG

Ti:sapphire rod

gratinggratings

Compressor

Dual Wavelength Spectra

Cross-Correlator

BBO

polarizer

half-waveplate

delayline

delayline

AgGaS2

AgGaS2

MIRCross-correlator

MIRspectrometer

Mid-Infrared Generation

Fresnel Losses

Absorption

Photon conversion

efficiency

Energy Input (mJ)0.0

0.1 1.00.0

1.0

2x10-2

1x10-2

Two-Photon Absorption

Two-Photon Absorption

Yb:Fibre Lasers

Two-Colour Fibre System

Two-colour seed(ideally an oscillator)

Two-colour fibre amplifier

Two-colour compressor

Two-Colour Fibre Seed

Ti:sapphire Oscillator

Photonic

Crystal Fibre

Seed Spectrum

Wavelength (nm)

Two-Colour Fibre Amplifier

Yb-doped double-clad

fibreDichroic mirrors

Notch filter

10 m

10m

Faraday Isolator

Two-colour seed

2W965 nm

Pump diode4W, 915 nm Pump Diode

Amplifier Spectrum

Wavelength (nm)

Two-Colour Fibre Compressor

5cm

Two-Colour Cross-Correlation

100080060040020000.00

0.10

0.20

Column 3

correlation time (fs)

Mid-infrared and next steps

GaSeHgCdTe detector

•new pre-amplifier - single clad

•new two colour oscillator - Yb:fibre or Yb:solid state

•incorporate fibre elements into amplifier - Bragg grating rather than interference filter

Acknowledgements

Post-doctoral Fellows

Dongfeng LiuJie Song

Undergraduates

Jason YoungSarah JohnsonChris FerriePaul Carr

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