Optimization of the polarization has been made the 03/10/18. Checked in reflection of the cavity in reflection&transmission of a PBS, locked and unlocked. Only with 2nd stage.
Ratio values are reflection of PBS divided by transmission or the opposite.
| |
Unlock value |
Ratio min/max |
Lock value |
Ratio min/max |
| No optimization |
|
|
|
|
| Reflection |
1.21 |
X |
3.89 |
X |
| Transmission |
14.3 |
8.5 % |
3.1 |
80 % |
| Only Lambda/2 |
|
|
|
|
| Reflection |
4.4 |
X |
2.91 |
X |
| Transmission |
11 |
40 % |
2.79 |
96 % |
| 2xLambda/2 + 1Lambda/4 |
|
|
|
|
| Reflection |
8.3 |
X |
3.4 |
X |
| Transmission |
6.8 |
82 % |
2.2 |
65 % |
| Same + PID optimization |
|
|
|
|
| Reflection |
9 |
X |
3.35 |
X |
| Transmission |
5.76 |
64 % |
2 |
60 % |
|