- #1
Jimbone
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I need to know the beam width of a pulsed yag laser (280.5 nm) when focused, assuming its completely guassian. The laser is focused through a bi-convex lens with f=15cm. I've found expressions for w(z), but they are all in terms of the minimum waist, w0, which I don't have and is probably the number I need. Can I some how approximate the beam width before or some distance after the lens, as it is on the order of mm on a business card, and use this to find my minimum waist after focused as well as w(z)?
Another problem I see is that I doubt the gaussian width I see on a business card reflects accurately the size, I've read what you see is about two times the actual width (as it is mostly fluorescance) ?
thanks
Another problem I see is that I doubt the gaussian width I see on a business card reflects accurately the size, I've read what you see is about two times the actual width (as it is mostly fluorescance) ?
thanks