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Thread: good question?

  1. #1
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    Default good question?

    i got a PM from a customer and he asked a pretty good, what should be a simple question for me to answer.

    can an argon beam be PBS'd with a 473 beam? i am guessing, NO. especially if the argon is a multi-line. the PBS we use have a cut-off of about 480 or something i think dont they?

    any input?

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  2. #2
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    if the argon is polarized, I don't see a problem..

    Easy to test to see whether it is by using the PBS in question - or look for the Brewster's
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  3. #3
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    All argons I have ever used were polarized, otherwise they would be nearly worthless for a PCAOM.

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    Cool

    Most PBS cubes have a pretty wide range of wavelengths that they'll work with. So mixing 488 and 473 would be a snap. Getting some of the shorter wavelength blues from that argon through the cube will probably entail higher losses, but it will still work.

    The real issue is polarization. *Some* argons are polarized, but not all of them are. For example, the 110V air-cooled Reliant units that Mobolaser used to use for their beam-rail projectors are all unpolarized. (And yes, this means you can't use a PCAOM to modulate them.)

    So the real question is, what sort of argon does the client have? If it's polarized, then there's no problem combining it with a DPSS blue using a PBS cube. If not, then they're hosed...

    Adam

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    I may be in trouble. At least I have not bought the additional blue
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    Oops... Well, sorry there James, but that is exactly the model of laser that I was referring to. I'm fairly certain that they are all unpolarized. If yours is unpolarized, then you can't use a PBS cube to mix anything with the beam.

    Adam

  7. #7
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    what is the average loss if an external polarizer is used? im guessing pretty high losses right? is it even possible?

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  8. #8
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    Figure 50% loss if you use an external polarizer.

    Adam

  9. #9
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    It's not worth it then. Thank you very much for your advice.

  10. #10
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    Quote Originally Posted by jamesx1234 View Post
    It's not worth it then. Thank you very much for your advice.

    No, just run the unpolarized beam into the cube, and use what comes out. On some unpolarzed argons this could be has high as 75% and stable, due to small defects internally in the mirrors encouraging a certain plane of polarization. Also some LPs had a internal brewster window so they would work with PCAOMS>

    THERE IS NO REQUIREMENT FOR A POLARIZED BEAM TO ENTER A CUBE, justa requirement that the cube act like its designed when one does!

    Check your laser before giving up!



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