YoheiNishino - 15:47, Tuesday 11 April 2023 (3228)
Beam profile of the Mephisto laser
Yohei,
What I did:
I have measured the beam profiles of the Mephisto laser. I have used a f250 lens to focus the beam, then estimated its original q-parameters of the laser.
Result:
The measured beam parameters (Fig1).
| beam radius [mm] | weist position* [mm] | M-factor | |
| x | 0.510 | 535 | 1.05 |
| y | 0.460 | 505 | 1.08 |
* z=0 is set to 100 mm away from the laser head. See the yellow tape in the attached picture (Fig2).
The estimated original parameters of the laser.
| beam radius [mm] | weist position* [mm] | |
| x | 0.161 | -164 |
| y | 0.174 | -176 |
The weist is 60-70 mm inside the laser head. The weist position is supposed to be 90 mm inside the laser head, but the estimated values suggest it's almost near the laser head. I don't know why it happens.
** Sorry but there is some error on the first figure.
Images attached to this report
