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JTK Notebook: Difference between revisions
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===== Short Term =====
* Do absorption measurements on our Ti:sapph crystal
* Figure out positioning of cavity elements/prep for cavity assembly
===== Long Term =====
* Ti:sapph cavity saturable absorber
* Blue optics (cylindrical-lens telescope, focusing lens) (maybe not necessary)▼
* Optical breadboard
▲* Blue optics (cylindrical-lens telescope, focusing lens)
== Log ==
'''9/1/2015'''
* Measured diode current vs power curve. Max is 2.8 W of output power at 3 A input current.
* Drilled a hole in the top of the crystal mount to add a set screw. Slathered the inside of the hole with thermal paste, slipped the crystal in, and tightened the set screw. Crystal is held quite solidly! May still have to redesign at some point, but this will definitely work for now. Some concern over thermal paste on sides of crystal, may want to clean it off at some point.
* 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. Probable loss mechanisms: scattering, polarization/Brewster losses (although we seem to have landed very close on our rough alignment).
'''8/31/2015'''
* Finished water chiller assembly and tested it. Many possible settings give OK performance, but I the best performance is when the water temperature is as low as possible (10 deg C), with the diode mount held at 20 deg C with the full 3 A of current running.
'''8/14/2015'''
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