Diffraction orders

  • Thread starter u0362565
  • Start date
  • #1
u0362565
52
0
Hi,

I was wondering how you can calculate the intensity of light produced by diffraction orders. If say a laser was incident on a diffraction grating and this split the zeroth and +-1 orders what percentage of the light intensity is within the zero and first orders and how can you work this out? I'm only looking for a rough percentage figure i don't actually need to calculate exact figures, i imagine that is possible if details of the grating/laser were known..

Many thanks
 

Answers and Replies

  • #3
u0362565
52
0
No i don't think i can, i know the power at the output of the laser cavity and the wavelength but i'm not sure how i could calculate the amplitude. However if the laser incident on the grating is only split into zero and +-1 orders and that constitutes 100% of the light then there isn't a general rule of thumb for what approximate light intensity percentage the zeroth would contribute relative to the -+1 orders?
Thanks
 
  • #5
u0362565
52
0
That's interesting I've not come across blazing before, I think I need more specific info about the grating to work this out, the grating transmits multiple wavelengths so perhaps the blaze angle is optimised for one wavelength only and the rest are a compromise.
Thanks
 
  • #6
LoopInt
36
1
You can calculate the interference pattern, then you square the amplitude of the wave of the point you want. There are very good videos on youtube that teach how to do that. Search for single slit diffraction and double.
Sorry I cannot help more, I am very very busy right now =(
 
  • #7
u0362565
52
0
Ok thanks i'll take a look. Thanks for your help!
 

Suggested for: Diffraction orders

Replies
1
Views
188
  • Last Post
Replies
2
Views
602
  • Last Post
Replies
2
Views
493
Replies
13
Views
503
Replies
6
Views
336
  • Last Post
Replies
10
Views
680
  • Last Post
Replies
1
Views
270
Replies
20
Views
695
Replies
7
Views
2K
Top