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Old 07-24-2017, 02:41 PM #17
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Default Re: Need "Reverse" PBS for 20W "laser tank gun" prototype - do they exist?

Quote:
Originally Posted by Light superglue View Post
Well, let me explain it again with drawing.

In post 4 jors has made a draft how all (letīs call them "normal") PBS cubes work.

I want a different PBS (letīs call it "reverse") in order to be more flexible with design of linear setups...

Maybe they do not exist but I doubt that making one would be a problem for an optics manufacturer...
Oh I think I see what you're saying now, you want a PBS that has the pass/reflect polarization rotated 90° to what you have just now?

Quote:
Originally Posted by Julian95 View Post
how are you polarizing the light before the waveplate without losing power?
The light from a laser diode is already linearly polarized.


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Old 07-24-2017, 03:16 PM #18
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Default Re: Need "Reverse" PBS for 20W "laser tank gun" prototype - do they exist?

Quote:
Originally Posted by diachi View Post


The light from a laser diode is already linearly polarized.
sorry i'm not very familiarized with this, which laser diodes are the ones that emit polarized light?, i know there are a couple of different types used in telecommunications that do, but in power lasers?, are they all polarized?

Last edited by Julian95; 07-24-2017 at 03:20 PM.
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Old 07-24-2017, 04:21 PM #19
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Default Re: Need "Reverse" PBS for 20W "laser tank gun" prototype - do they exist?

Quote:
Originally Posted by Julian95 View Post
are they all polarized?

Yes.
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Old 07-27-2017, 08:22 PM #20
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Default Re: Need "Reverse" PBS for 20W "laser tank gun" prototype - do they exist?

Hi Diachi,

I am happy to see that you understand my question now.
Would there be any rules prohibiting to make such a PBS with rotated polarisation?
All PBS cubes I have (and I have many of them from different suppliers) work the same. But I am still searching...
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Old 07-27-2017, 09:40 PM #21
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Default Re: Need "Reverse" PBS for 20W "laser tank gun" prototype - do they exist?

Quote:
Originally Posted by Light superglue View Post
Hi Diachi,

I am happy to see that you understand my question now.
Would there be any rules prohibiting to make such a PBS with rotated polarisation?
All PBS cubes I have (and I have many of them from different suppliers) work the same. But I am still searching...

Can't see any cubes that are rotated.

However, what about using a PBS plate and rotating the plate 90°?
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Old 07-28-2017, 08:23 AM #22
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Default Re: Need "Reverse" PBS for 20W "laser tank gun" prototype - do they exist?

Quote:
Originally Posted by diachi View Post
Can't see any cubes that are rotated.

However, what about using a PBS plate and rotating the plate 90°?
Do you know where to purchase those polarising plates? thanks
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Old 07-28-2017, 02:37 PM #23
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Default Re: Need "Reverse" PBS for 20W "laser tank gun" prototype - do they exist?

Quote:
Originally Posted by jors View Post
Do you know where to purchase those polarising plates? thanks

Edmunds and Thorlabs both have them.
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Old 08-01-2017, 06:56 PM #24
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Default Re: Need "Reverse" PBS for 20W "laser tank gun" prototype - do they exist?

If you mean those PBS plates Thor sells at 335EUR + tax, then this is not price for me. Also, they do not have them for blue.
From Edmunds it looks that they are very fragile - so now I better understand why everyone is using cubes - 2nd shape from the ones hardest to break (after sphere of course)
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