Considering the beam after the 1st telescope (after the FI), with characteristics of w0=403.3um at 792.4mm after the telsecope --> Fig 1. 

We need to fit 2 EOM with aperture 2mm diameter, and around 100mm width. 

For 2 EOM, this space is 200 mm. Considering the space to mount them 250 mm is reserved

With a polarizer and the photodiode, the total space should be around 350mm.

The photodiode has aperture of 500 um diameter.

The beam should be hence, around 500/2/2 um = 125 um, radius. It was not possible to have lower beam waist with available lens. A lens of -200 mm focal length can perhaps help us do this.

The telescope was designed using Jammt. The Fig 2 shows the expected beam characteristics.

The first lens F=-100mm, is kept at roughly 140 mm after the initial telescope. The 2nd lens F=100mm is kept at 180 mm. There is a label on table after the 1st telescope defining the 0th position .

After that QWP and HWP are installed to make linear polarization. They are at 200-220 mm.

The EOM is kept at 400-500 mm at 45degree for characterization.

The beam characteristics after the 2nd telescope is shown, in Fig 2.