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Old 04-21-2011, 03:37 AM #1
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Default Good source for PBS cubes?

Guys, I'm looking to combine two 405nm diodes for my CNC laser (qumefox suggested I do this in a previous thread). I have one running already in my CNC but I'd like to try with two for faster/cleaner cuts if possible.

a. Is it feasible to combine two beams for cutting or am I going to create a rather large spot due to misalignment?

b. what is a good source for PBS's? I've seen ctlasers.com they sell 405nm coated PBSs for about $60.


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Old 04-21-2011, 05:00 AM #2
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Default Re: Good source for PBS cubes?

I bought a coated PBS from Crylight for $50....10x10x10
Good product. No issues

Oh and if you do go this route I highly recommend you get a Newport type mount to attach the PBS. It can be a pain to align the two axises without a good commerial optic mount. I just glued the PBS directly to the mount.
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YAG 2J Pulse (Still need a PSU)
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Old 04-21-2011, 05:23 AM #3
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Default Re: Good source for PBS cubes?

If you look at the picture you can see my PBS attached to the mount
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Good source for PBS cubes?-dsc_0502.jpg  
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Old 04-21-2011, 05:24 AM #4
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Default Re: Good source for PBS cubes?

Damn blrock! are you rich? You have so many laser!
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Old 04-21-2011, 05:28 AM #5
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Default Re: Good source for PBS cubes?

for low cost BSC, try surplusshed.com -Glenn


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Awesome rhd 451nm 2.1 W SOLD! & 445 >2W by DTR! , Yobresal 1.2W Cree & pen 445 w/ star-cap doing 750 mW!! 500mW 445nm Dorcy Jr. Thanks to Flaminpyro!
Awesome Osram 450nm pocket mini from DTR does about 750mW!

Big T/Y! to builders: IgorT, DTR, john lawson, jayrob, IgorT, whatsupadrian, daguin, and all!
Spiro toy mod w/ side aperture for any pointer Spiro toy in Violet Spiro by yobresal too!
Laser sleds/ diodes sold so far 1180+ A few LPC-826 diodes F.S. $12 ea.



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Old 04-21-2011, 05:34 AM #6
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Default Re: Good source for PBS cubes?

I don't get what coated means? Is it for specific wavelengths?
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Old 04-21-2011, 06:19 AM #7
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Default Re: Good source for PBS cubes?

Quote:
Originally Posted by bhwollen View Post
Damn blrock! are you rich? You have so many laser!
If I were rich there'd be several 40 watt green YAGs on my signature. And a 22 watt white light

Naw, just been building up the collection for 16 years. I'm a hard core laser nut.
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Old 04-21-2011, 06:21 AM #8
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Default Re: Good source for PBS cubes?

Want to help a newbie out with some good deals on lasers you don't need anymore?
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Old 04-21-2011, 06:22 AM #9
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Default Re: Good source for PBS cubes?

most optics have anti-reflective coatings, either for specific ranges, i.e. IR, UV, xnm - ynm or broadband, (visible spectrum)...
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Rigel SOLD! 3-4 mW I Love it PGL III 593.5nm doing >20 mW! SOLD!
Several Green lasers, EVO PRO Peak ~160 mW & Spyder I Peak 295 mW are my new green favorites!
LG Aquarius -10 & Viasho 473 nm peak ~29 mW WL S3 >60 mW peak 112mW SOLD!
Awesome rhd 451nm 2.1 W SOLD! & 445 >2W by DTR! , Yobresal 1.2W Cree & pen 445 w/ star-cap doing 750 mW!! 500mW 445nm Dorcy Jr. Thanks to Flaminpyro!
Awesome Osram 450nm pocket mini from DTR does about 750mW!

Big T/Y! to builders: IgorT, DTR, john lawson, jayrob, IgorT, whatsupadrian, daguin, and all!
Spiro toy mod w/ side aperture for any pointer Spiro toy in Violet Spiro by yobresal too!
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Old 04-21-2011, 06:27 AM #10
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Default Re: Good source for PBS cubes?

Ah, so if I were to combine two 445's this would do the trick?

20MM COATED CUBE BEAMSPLITTER - Surplus Shed
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Old 04-21-2011, 06:39 AM #11
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Default Re: Good source for PBS cubes?

looks good, I looked and didn't see that one this time around... -GH
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Red Burner on board, need more ~650 nm 140 mW
8 red Hene's 632.8 nm 2-3mW green HeNe & T/Y to rhd 635nm ~400mW
Rigel SOLD! 3-4 mW I Love it PGL III 593.5nm doing >20 mW! SOLD!
Several Green lasers, EVO PRO Peak ~160 mW & Spyder I Peak 295 mW are my new green favorites!
LG Aquarius -10 & Viasho 473 nm peak ~29 mW WL S3 >60 mW peak 112mW SOLD!
Awesome rhd 451nm 2.1 W SOLD! & 445 >2W by DTR! , Yobresal 1.2W Cree & pen 445 w/ star-cap doing 750 mW!! 500mW 445nm Dorcy Jr. Thanks to Flaminpyro!
Awesome Osram 450nm pocket mini from DTR does about 750mW!

Big T/Y! to builders: IgorT, DTR, john lawson, jayrob, IgorT, whatsupadrian, daguin, and all!
Spiro toy mod w/ side aperture for any pointer Spiro toy in Violet Spiro by yobresal too!
Laser sleds/ diodes sold so far 1180+ A few LPC-826 diodes F.S. $12 ea.


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Old 04-21-2011, 09:31 AM #12
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Default Re: Good source for PBS cubes?

Quote:
Originally Posted by bhwollen View Post
Ah, so if I were to combine two 445's this would do the trick?

20MM COATED CUBE BEAMSPLITTER - Surplus Shed
No I don't think that'll work.

That looks like a beam splitter NOT a polarizing beam splitter. Big diffrence. Using that splitter won't combined the beams hence PBS are more expensive than "normal" beam splitters

This one will split two 1 watt 445 into two 1000mw beams not ONE 2000mw beam.
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1657mW 532nm Lab
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10W 808nm Fiber system (anyone want to swop for small Green Argon?)
1183mW 650nm
1800mW Watt 445nm (2x900mW through PBS)
510mW 532nm
500mw 635nm (DEAD Apr 2011)
259mw 660nm
2 Watt 808nm
205mw 404nm
YAG 2J Pulse (Still need a PSU)
Countless laser diodes.
Lots of 5-10mw green lasers
3mw He-Ne (My first laser. 1995)
20 high power c-mounts

Last edited by blrock; 04-21-2011 at 12:42 PM.
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Old 04-21-2011, 01:53 PM #13
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Default Re: Good source for PBS cubes?

Even PBS cubes wont combine all of the lasers output as far as I know. If you want full power knife edging is the route most go but you would likely end up with a larger focal point.
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Old 04-21-2011, 04:18 PM #14
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Default Re: Good source for PBS cubes?

andycon has had some good results with knife edging. look him up and go to his website.

michael.
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Old 04-21-2011, 08:17 PM #15
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Default Re: Good source for PBS cubes?

Quote:
Originally Posted by Helios View Post
Even PBS cubes wont combine all of the lasers output as far as I know. If you want full power knife edging is the route most go but you would likely end up with a larger focal point.
The loss is negligible. I have something like 1% on my one axis and 5% on the other. Therefore 2000mW input = 120mW loss.

Of coarse knife edging is awesome cause you not limited to two lasers
__________________
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MY LASER COLLECTION:
3.6 Watt RGB
1657mW 532nm Lab
10 one Watt 445nm
10W 808nm Fiber system (anyone want to swop for small Green Argon?)
1183mW 650nm
1800mW Watt 445nm (2x900mW through PBS)
510mW 532nm
500mw 635nm (DEAD Apr 2011)
259mw 660nm
2 Watt 808nm
205mw 404nm
YAG 2J Pulse (Still need a PSU)
Countless laser diodes.
Lots of 5-10mw green lasers
3mw He-Ne (My first laser. 1995)
20 high power c-mounts
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Old 04-21-2011, 11:26 PM #16
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Default Re: Good source for PBS cubes?

Quote:
Originally Posted by scopeguy20 View Post
for low cost BSC, try surplusshed.com -Glenn


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I've bought some of them, and they're just beamsplitters, not combiners. If you shine a laser into either end, they'll split into two (quite nicely), but you can't combined beams aside from having two split from two lasers beams merge, each at 50% power.
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