We went at the NEB to check the status of the infrared seed.

We checked the temperature of the PPLN crystal and the setpoint was already optimal (116.4C).

We opened the PSTAB loop (14:59:46 UTC) and moved the fiber in input of the SOA (15:00:10 UTC): the IR power increased but it was very noisy. Since this kind of noise is typically produced by the 2W amplifier, we modified the setpoint from 32dB to 32.2dB (15:02:39 UTC) and the noise suddenly disappeared (see fig 1).