KAGRA MIR (General)
PengboLi - 21:47, Friday 24 January 2020 (1996)
Result of the beam profile measurement

Simon Pengbo

Today, we continue the measurement of the beam waist. First we changed the position of the first lens, putting it bewteen the FI and the PBS, and make it adjustable.

By changing the position of the first lens, we did two x axis scans. It seems that as the first lens moves away from the FI, the waist become lager and closer to laser bench direction. 

We will do more tests next week.

 

Today, we continue the measurement of the beam waist. First, we changed the position of the first lens, putting it between the FI and the PBS, and make it adjustable.
 
By changing the position of the first lens, we did two x-axis scans. It seems that as the first lens moves away from the FI, the waist becomes lager and closer to laser bench direction
Images attached to this report
1996_20200124133814_0124.png 1996_20200124133820_012401.png