I measured the beam profile of probe and pump near the crossing point.
Set a vertical blade to the translation stage and move it from PCI software.
Read data on the power meter and fit with erf function.
This table is a summary of the results.
| Probe | Pump | |||||
| z (mm) | y_0 (mm) | halfwidth (um) | y_0 (mm) | halfwidth (um) | ||
| 0 | 37.5 | 178 | 39.75 | 172 | ||
| 20 | 39.7 | 145 | 39.85 | 48 | ||
| 30 | 41 | 126 | 39.92 | 70 | ||
| 50 | 43 | 94 | 40 | 172 | ||
The probe waist is about 94um (radius at 1/e^2) but it is not near the crossing point. At the crossing point the beam size is about 290um (diameter).
The pump waist is about 48um (radius at 1/e^2) and is near the crossing point. At the crossing point the beam size is about 100um (diameter).
The angle between pump and probe is 0.105rad, or 6°.
The PCI manual said beamsizes of 200um and 70um. Which were the values I used until now in my simulations.
I will put those new measured parameters in the simulations.
