Today we did some progress on the EOM telescope.

As shown in Fig1, by using a f = 100mm lens at the output of the EOM, we can obtain a collimated beam roughly the size of the CC beam (Fig. 2).

We our many attempts to design the EOM telescope, we have placed at least 3 times a f = 100 mm lens before the EOM without noticing any huge difference on the astigmatism of the beam at the output of the EOM.

Therefore, we think that it can be useful to put the lens before the EOM of a "simple" post (its position is on a hole) and place the lens after the EOM on the rail.

This might be useful to match more precisely the beams of the CC and p-pol laser.

The next steps are :

install the 2 steerings mirrors and the lambda/2 on the p-pol path.

install the steering mirror and the pbs on the cc path to recombine the 2 beams.

Install a converging lens after the pbs to finely match the 2 beams.

Start the design of the OPO telescope with CC beam as reference. For this telescope, we plan to use a 30 cm long rail to be able to finely match the beams with the OPO