I wanted to check the absorption of some laser crystals of different shape and dimensions (approximate dimensions 2mmx2mmx2mm). What we have is a normal Perkin elmer UV-VIS spectrometer. Since scattering from the crystal is high, we are not able to get a decent spectrum. I tried a pinhole to reduce the size of the beam hence to avoid a bit of scattering, but still the spectrum is not that clear. Can any one suggest some method to resolve the situation? How is the absorption spectrum of bulk crystals usually taken?
Thanks for the reply Ran chen, Ofcourse, But I don't want to break my crystal though, that is why I was looking for supplimentary solutions !
Fix Your crystal in the center of cuvette filled with water in the hole of thin metal list. By this manner I have measured absorption of jeweller crystals. But their diameter was about 5 mm.
Yurij : but then dont you have to remove the absorption of water separately then ?
Absorption of water should be remooved. You may measure empty hole in cuvette with water as reference and spectrometer do it for You.
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