Log on June 23, 2020

What I did

First, I tried to lock the laser with turbo pump on.
Actually, the lock was not stable and it may need suspension to reduce the vibration.

Then, I inserted the spacer and installed mirrors to compose the folded cavity.
The procedure was as usual.
This time I removed the block between the spacer and mirror holder to reduce the cavity length as shown in the picture.
Thanks to this, I could see the transmitted flash as shown in the picture (red line).
Still transmitted power is low and need to be improved.

Next step

I will improve the alignment to increase the transmitted power.
Then I will try to lock the laser to the cavity.