Power density calculation of Laser

[shyamavanil]

Homework Statement

In our Lab we have a Nd:YAG pulsed laser of 420mj ,10 ns pulse width...focused to 1 mm spot

Homework Equations

what's the power density? how it calculate?

The Attempt at a Solution

 

[ideasrule]

Power density is the power delivered by the laser per unit area. That means you need to know two things to calculate it:

(1) the laser pulse's power
(2) the area

Can you get the answer now?

 

[shyamavanil]

Power density is the power delivered by the laser per unit area. That means you need to know two things to calculate it:

(1) the laser pulse's power
(2) the area

Can you get the answer now?

Tnx bhai Yes i got it..
(1)Is Laser pulse's power = Laser energy /Pulse duration ??

In this machine we can Adjust Pulse repetetion rate and Energy per volt
(2) Is it possible to find out Pulse Duration from this pulse repetetion rate?