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If I focus a 1 watt, 405nm laser with a 25mm fl lens what is the power at the waist and what is the waist diameter. I see calculators online but none that make sense. Rather than just telling me can you put your equations you use to solve for these items. I would also like to know the minimal distance or bream waist i can focus my laser beam down to depending on my lens and how big the beam is before having it hit the lens. Aperture is 3mm which is 0.003m before entering the beam

If I focus a 1 watt, 405nm laser with a 25mm fl lens what is the power at the waist. I see calculators online but none that make sense. Rather than just telling me can you put your equations you use to solve for these items. I would also like to know the minimal distance or bream waist i can focus my laser beam down to depending on my lens and how big the beam is before having it hit the lens. This chart shows different apertures and focal lengths to get the beam waiste. I see that power intensity (w/cm2) is 250/d(mm)2 x power. But i get a ridiculous number so please help.

If I focus a 1 watt, 405nm laser with a 25mm fl lens what is the power at the waist and what is the waist diameter. I see calculators online but none that make sense. Rather than just telling me can you put your equations you use to solve for these items. I would also like to know the minimal distance or bream waist i can focus my laser beam down to depending on my lens and how big the beam is before having it hit the lens.

If I focus a 1 watt, 405nm laser with a 25mm fl lens what is the power at the waist and what is the waist diameter. I see calculators online but none that make sense. Rather than just telling me can you put your equations you use to solve for these items. I would also like to know the minimal distance or bream waist i can focus my laser beam down to depending on my lens and how big the beam is before having it hit the lens. Aperture is 3mm which is 0.003m before entering the beam