Nishino
I put Faraday isolator and EOM in the green path of Prometheus.
Faraday: Thorlabs, IO-3-532-LP (2.7 mm)
Resonant EOM: Thorlabs EO-PM-R-20-C1, 20MHz (2 mm)
Before them, two lenses with focus length of 100 and 150 mm are placed at z=125 and 262.5 mm, respectively. Schematics are shown here.
Beam widths around input and output ports of Faraday and EOM are measured as below:
| z [mm] | Diameter x [mm] | Diameter y [mm] |
| 175 | 0.35 | 0.20 |
| 225 | 0.16 | 0.17 |
| 325 | 0.42 | 0.37 |
| 380 | 0.50 | 0.43 |
These are not well precise, but just to check that the beam size is smaller enough than apertures of Faraday and EOM.
They are all less than 1.5 mm for 6 sigmas. It approved that beam will not be clipped.