PL tb450b Osram

[polishedball]

You had me until you said 'diffraction grating'. What's that going to do?

If the wavelength is truely higher when I put it through a grating the two beams will separate. This is just as a test to see how different if any there is between what most use at 445 and theses supposedly at 450 as far as wavelength.

[planters]

I would be interested to see if the wavelength is different than the M series or the 9mm diodes. If I remember correctly I looked at a bunch of the m modes over a year ago and out of something like a dozen the wavelength varied from near 450 to nearly 460nm. It spanned about 7nm.

[The_Doctor]

If the wavelength is truely higher when I put it through a grating the two beams will separate. This is just as a test to see how different if any there is between what most use at 445 and theses supposedly at 450 as far as wavelength.

Oh. Ok, thanks. I thought it was something permanent and therefore mysterious, not diagnostic..

I remember someone saying that a CD can be used for limited diffraction tests, but I'm not sure if it's strong enough to separate fairly small differences in deflection.

[norty303]

Line spacing on a CD is in the order of 1.6 microns, which should be adequate for this purpose.
I've used CD's as beam targets in the past and you get a fairly good amount of diffraction.

[polishedball]

Edit ill update power table soon but my power meter was miscalibrated. This diode I have two are putting out much more power than I expected. At 1.83a I am getting 2.34W.