PHYS30611 Lasers and Photonics Paul Campbell

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PHYS30611Lasers and Photonics Paul Campbell
Lecture 20

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Revision and brief summary

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Revision and summary
e i(wtkx)
k k1 ik2
e i(wt x)
e x
k1
-k2
Now work out g(u)

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Revision and summary
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Revision and summary
..evaluate classical polarisation and thus
susceptibility..
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Revision and summary
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Revision and summary

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Revision and summary

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Revision and summary
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Revision and summary

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Revision and summary

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Revision and summary

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Revision and summary
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Revision and summary

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Not Examinable
To be stable
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Examinable

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Revision and summary

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Revision and summary
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Revision and summary
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Revision and summary
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Reminder on Lecture 15

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Summary of Lecture 15
The index ellipsoid (for a negative uniaxial
crystal)

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Gas Helium-neon Carbon dioxide Ar/Kr ion
Nitrogen etc
Solid NdYAG variants Titanium sapphire
Alexandrite etc
Liquid Organic dye lasers
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Lecture 17
Gain switching

• Flashlamp
• Spark discharge
• Current pulse (diodes)

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Lecture 17
Q switching

• NdYAG with Pockels cell (active)
• CrYAG (passive)

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