Changes

The same collars should work for both light guides and sci-fis. I need to calculate what I plan to take off, though, to be sure. I think I should also check once I have polished a bundle that they fit right in the splicing unit. If they are too long, I can take more off, but if they are too short, they will be more likely to be no good.  

The same collars should work for both light guides and sci-fis. I need to calculate what I plan to take off, though, to be sure. I think I should also check once I have polished a bundle that they fit right in the splicing unit. If they are too long, I can take more off, but if they are too short, they will be more likely to be no good.  

Jim thinks we need a LG bundle highly polished on both ends for dark rate testing. Apparently the dark box testing equipment needs to be calibrated.

Jim thinks we need a LG bundle highly polished on both ends for dark rate testing. The dark box testing equipment needs to be calibrated before it is useful. Right now, all we could tell is that a fiber is very bad. We can't tell whether a fiber is very good, barely good, or a little less than adequate. One problem is that the SiPMs are reading differently, and another is that the laser brightness is not uniform across the beam. There is a screen for the laser that is not quite perpendicular to the beam, and that is causing the variation in brightness.

 

Jim also showed me how to make socks for the fibers.