JTK Notebook: Difference between revisions

Jump to navigation Jump to search
no edit summary
No edit summary
No edit summary
 
===== Short Term =====
* Do absorption measurements on ourAssemble Ti:sapph crystallaser
* Figure out positioning of cavity elements/prep for cavity assembly
 
===== Long Term =====
* Assemble Ti:sapph laser
* Build box for Ti:sapph laser
 
* Aligned blue beam through crystal. Very cool! Crystal mount holds at 15 deg C easily. Possible concerns over difference between this temperature and the internal temperature of the crystal inside the beam path, but we don't have a way to measure that. Ran for ~1 hour, no visible signs of damage. Not too worried.
* Took a first run at the absorption measurement. 2.8 W in, 1 W made it through the crystal, which is 64% absorption if true - doubtful. We're only measuring transmission, so we can't be sure that the full 2.8 W is incident on the crystal. Probable pre-crystal loss mechanisms: scattering, polarization/Brewster losses (although we seem to have landed very close on our rough alignment).
* Added green dots to diode tube and mount - when the dots are lined up the output is coming out p-polarized relative to the crystal. Note that rotating the diode tube changes the beam path because I'm bad at machining, so it won't be aligned if you rotate it anyway.
 
'''2015-8-31'''
79

edits

Navigation menu