• Support PF! Buy your school textbooks, materials and every day products Here!

Lasers- the avg power of the resulting laser pulse over a time interval

  • #1

Homework Statement


Suppose that total population inversion could be achieved in a ruby laser. If half of the electrons in E2 could then drop to E1 in 30 ns, what would be the avg power of the resulting laser pulse over this time interval? Assume that the ruby crystal is a cylinder 5.00cm long and 1.19cm in diameter and that on Al in every 1700 has been replaced by a Cr. Density of Al2O3 = 3.7g/cm^3. E2-E1=1.786eV


Homework Equations



h(bar)w = E2-E1

The Attempt at a Solution



I have no idea really. That eqn above is all my book gives. Somehow it's creating a situation where more electrons are in states of energy E2 than in state of energy E1.
 

Answers and Replies

  • #2
ehild
Homework Helper
15,427
1,827

Related Threads on Lasers- the avg power of the resulting laser pulse over a time interval

  • Last Post
Replies
0
Views
5K
Replies
4
Views
4K
Replies
1
Views
41K
Replies
4
Views
4K
Replies
0
Views
2K
Replies
4
Views
2K
  • Last Post
Replies
4
Views
14K
  • Last Post
Replies
3
Views
614
  • Last Post
Replies
0
Views
323
  • Last Post
Replies
3
Views
1K
Top