Hey Everyone!
As some of you may know. I'm constructing a quad blue for a member here and I'm having a little trouble with the PBS. Unfortunately there are no 445nm cubes available, at least that I know of. So, for this project I picked the 473nm PBS cube thinking that the wavelength would be close enough that I would not get too much loss. As it turns out, it is a HUGE problem.
See, the two beams heading into the cube like this... "=" are reflecting properly off the 45 degree surface just fine and I get transmission of around 90%! Not bad!
However.... The two beams that are going straight through the cube, like this... "ll" I'm only getting 10% power transmission after cube! HORRIBLE!
Yes, I checked the polarization and all I can do is just loose more power.
Now, It seems that Heroic had very good luck, even though some loss but not nearly as much, from the 405nm PBS. I am just surprised that I would be getting this great amount of loss from the 473nm cube.
Can anyone shed some light (no pun intended) as to why I'm having such great loss from the 743 PBS?
Thanks!
Adam