- As you said, I just calculated the waist position in the crystal because the speed of light changes in a medium and eventually the waist position also changes.
- Yes, I did. Once you get a beam with the right waist size, you just put your crystal at the waist position with the offset.
In fact you don't have to think about the rayleigh range inside of the crystal because what we care is the waist size and it doesn't change.
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If I understand your elog, you are just calculating the the offset in position space that you get by having a refractive index.
Did you end up changing the mode matching so that the rayleigh range (which changes with refractive index) was confocally focused inside the crystal (e.g. Zr = 15 mm?
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