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 Wed May 17 18:08:45 2017, Dhruva, Update, Optical Levers, Beam Profiling Setup 
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 Mon May 22 10:53:02 2017, Dhruva, Update, Optical Levers, Beam Profiling Results 6x
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Tue May 23 10:27:24 2017, Dhruva, Update, Optical Levers, Beam Profiling Results 6x
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Tue May 23 15:22:04 2017, rana, Update, Optical Levers, Beam Profiling Results
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Tue May 30 18:31:54 2017, Dhruva, Update, Optical Levers, Beam Profiling Results
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Thu Jun 8 12:43:42 2017, Dhruva, Update, Optical Levers, Beam Profiling Results
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Tue May 23 16:33:00 2017, Steve, Update, Optical Levers, Beam Profiling Results
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Message ID: 13006
Entry time: Tue May 23 10:27:24 2017
In reply to: 13002
Reply to this: 13007
13008
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| Author: |
Dhruva |
| Type: |
Update |
| Category: |
Optical Levers |
| Subject: |
Beam Profiling Results |
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I have attempted to calculate the instrument error (micrometer least count) using the values of the spot size obtained by the least squares fitting method. This error is large towards the centre of the beam as the power varies significantly between adjecent markings of the micrometer. Using the new values of error obtained, I used the chi-square fitting minimisation method to further optimise the waist size.
The modified values are -
z(cm) w (in)
4 0.0134
10 0.0135
15 0.0140
20 0.0142
25 0.0150
And the revised values for the beam waist and location are 338.63 microns and -2.65 cm respectively.
I will now try to use the chi-square stastitic to estimate the error in spot size. |
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