R&D (Speed meter)
YoheiNishino - 20:13, Thursday 19 September 2024 (3747)
Profile of the prometheus/Mephisto laser for PLL

Nishino

This is a continous work of 3700.

I measured the beam profile of the Prometheus (auxiliary) and Mephisto (main) laser. Layout can be found in Fig. 1 and 2.

Fig 3 and 4 are the profile of the main and aux lasers. The main profile was measured on 2024.9.13. 

Origins of z coordinate are labeled in Fig. 1 and 2.

As mentioned in 3700, the profile of prometheus laser is very dirty, which makes it har to fit the propagation with gaussian propagation beautifully (Fig. 4).

Images attached to this report
3747_20240919131011_img0961.jpg 3747_20240919131036_layout.jpg 3747_20240919131213_profile.png 3747_20240919131225_profile.png