Power density calculation of Laser

AI Thread Summary
Power density of a laser is calculated by dividing the laser's power by the area over which it is focused. For a Nd:YAG pulsed laser with 420 mJ energy and a 10 ns pulse width focused to a 1 mm spot, the power can be determined using the formula: power = energy/pulse duration. The discussion also explores how to adjust the pulse repetition rate and energy per volt, raising the question of whether pulse duration can be derived from the pulse repetition rate. Understanding these calculations is essential for determining the laser's effectiveness in various applications. Accurate power density calculations are crucial for optimizing laser performance in laboratory settings.
shyamavanil
Messages
2
Reaction score
0

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

 
Last edited:
Physics news on Phys.org
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?
 
ideasrule said:
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?
 

Thread 'Errors and significant figures'

I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
View full post »
Thread 'A cylinder connected to a hanging mass'

Thread 'A cylinder connected to a hanging mass'

Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
View full post »

Similar threads

Question about the Peak and Average Power of a Laser
Replies
3
Views
2K
How do I calculate the fluence of a Gaussian Laser Beam?
Replies
3
Views
2K
Uncertainty in the energy of a laser beam
Replies
18
Views
4K
Finding the gain coefficient at line centre for a HeNe Laser
Replies
4
Views
1K
Thermal Conductivity and Lasers
Replies
1
Views
1K
Calculating attenuation necessary to reduce number of photons
Replies
8
Views
2K
What is the Force F acting on a NdYAG laser of 1 kW ?
Replies
2
Views
1K
Mean Frequency and Frequency Spread of a Laser Pulse
Replies
3
Views
2K
I Ion Ablation Target Experiment: Estimating Energy Spread
Replies
6
Views
2K
Long distance electrical transmission efficiency
Replies
2
Views
2K

Hot Threads

Recent Insights

Back
Top