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 Mon May 10 20:03:22 2010, Kevin, Update, Green Locking, Green Laser Beam Profile 
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 Mon May 10 22:25:03 2010, Koji, Update, Green Locking, Green Laser Beam Profile
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Tue May 11 14:39:17 2010, Aidan, Update, Green Locking, Green Laser Beam Profile
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Tue May 11 17:02:43 2010, Kevin, Update, Green Locking, Green Laser Beam Profile
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Wed May 12 03:42:38 2010, Koji, Update, Green Locking, Green Laser Beam Profile
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Fri May 14 16:14:37 2010, Kevin, Update, Green Locking, Green Laser Beam Profile
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Message ID: 2912
Entry time: Tue May 11 17:02:43 2010
In reply to: 2909
Reply to this: 2916
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| Author: |
Kevin |
| Type: |
Update |
| Category: |
Green Locking |
| Subject: |
Green Laser Beam Profile |
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Quote:
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Hey, what a quick work!
But, wait...
1) The radius of the beam was measured by the razor blade.
2) The diameter of the beam (13.5% full-width) at each point was measured by Beam Scan. The one at z=~7cm was consistent with 1)
3) The data 2) was fitted by a function w = sqrt(w0^2+lambda^2*(x-x0)^2/(pi*w0)^2). This is defined for the radius, isn't it?
So the fitting must be recalculated with correct radius.
Make sure that you always use radius and write with a explicit word "radius" in the record.
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I recalculated the fits using the radius of the beam instead of the diameter of the beam at 13.5% full-width with the following results:
For the vertical beam profile:
reduced chi^2 = 3.25
x0 = (-86 ± 1)mm
w0 = (46.01 ± 0.38)µm
For the horizontal beam profile:
reduced chi^2 = 2.05
x0 = (-81 ± 1)mm
w0 = (45.50 ± 0.28)µm |
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