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CO2 N2 Lasers - Printable Version

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CO2 N2 Lasers - Ethon - 05-12-2018

Hi,


Just revising for an exam in the next few weeks. I'm doing a bit of physical chemistry and I'm looking through the lasers section, I know how the general principles of 3 and 4 levels lasers work but I have a small section on 'N2 CO2 Laser' and I don't quite see how it works, I only have a diagram and I must have missed out some notes that should be written next to it.

I can see it has something to do with antisymmetric stretches, symmetric stretches and the bending vibrational modes but the picture alone doesn't show me how it works, can anybody explain what happens here ?