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Old 06-12-2012, 12:06 AM #17
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Default Re: Beam combiner tests (new battery-driver holder)

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Originally Posted by offroadfreak8582 View Post
Apperently there are

Any is it possible to have these two diodes right next to each other and maybe incorporate these optics in a handheld?

Greetings,,
Yes, the optical head is now in the machining and i will post further informations and test results.


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Old 06-12-2012, 03:43 AM #18
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Default Re: Beam combiner tests (new battery-driver holder)

Just wondering, where did you get the PBS cubes? How much do they cost approx?
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Old 06-12-2012, 01:05 PM #19
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Default Re: Beam combiner tests (new battery-driver holder)

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Just wondering, where did you get the PBS cubes? How much do they cost approx?
I got it from an optics laboratory to make some tests of the splitting ratio and the mechanical setup.
When the beam enters a face it splits into two orthogonal beams depending on the polarization. When the polarization angle is at the wanted value by rotating the diode, the splitted beam reach its minimum and the transmitted beam its maximum. Even with a perfect angle a small part of the beam, about 0.1%, is dispersed leaving the cube in the unwanted direction. The unwanted direction is the same for the two diodes (the face of the cube which is opposite to the one with the prism mirror ahead).
To minimize the dispersion, a good technique is to search the minimum at the unwanted direction separately searching the correct rotation angles for the two diodes. The mechanical mounting tolerances must be kept at minimum. Also the alignment of the diodes is important because, with a small angle error, the two combined beams diverge at long distances.
The mechanical setup is also influenced by the thermal dilatation of the parts when you are using a big power. To avoid further heat to the optical head it's also important to have an high efficiency of the driver.

Last edited by laserluke; 06-12-2012 at 04:04 PM.
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Old 06-12-2012, 04:25 PM #20
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Default Re: Beam combiner tests (new battery-driver holder)

Lasershow Parts has them for $40.
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Old 06-12-2012, 10:03 PM #21
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Default Re: Beam combiner tests (new battery-driver holder)

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Lasershow Parts has them for $40.
They are apparently sold without specifications.
You must know the damage threshold value because the high power laser beam could damage the coating.

To anyone: please check the damage threshold of the pbs cube and the prism mirror before place an order: a good source of information is here

Last edited by laserluke; 06-12-2012 at 10:45 PM.
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Old 06-13-2012, 12:50 AM #22
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Default Re: Beam combiner tests (new battery-driver holder)

It's high enough to not be a concern with diode lasers. We've been sending several watts through them without problems for years. The only way you damage optics at these powers is if you use plastic lenses, or if there is contamination.
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Old 06-13-2012, 01:46 AM #23
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Default Re: Beam combiner tests (new battery-driver holder)

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It's high enough to not be a concern with diode lasers. We've been sending several watts through them without problems for years. The only way you damage optics at these powers is if you use plastic lenses, or if there is contamination.
In all fairness, I have melted glass on a prism pair @ 1.5W but the beam
was a tight focal point and the prism coated for 808...

I did however make a labby with the same prisms coated for 808 and at 1W
passing through them, the parallel beam seems to be fine.
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Old 06-13-2012, 01:57 AM #24
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Default Re: Beam combiner tests (new battery-driver holder)

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It's high enough to not be a concern with diode lasers. We've been sending several watts through them without problems for years. The only way you damage optics at these powers is if you use plastic lenses, or if there is contamination.
That's a good new!!!
What year do you have started to send several watts with a diode through a pbs cube?
Could you post some images of your tests?

Last edited by laserluke; 06-13-2012 at 02:16 AM.
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Old 06-13-2012, 03:58 AM #25
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Default Re: Beam combiner tests (new battery-driver holder)

Swamidog in this thread

Andy_con in this thread and this thread

And possibly the most impressive: planters in this thread.

There are plenty others - use the search tool.
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Old 06-13-2012, 07:59 AM #26
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Default Re: Beam combiner tests (new battery-driver holder)

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Originally Posted by Cyparagon View Post
Swamidog in this thread

Andy_con in this thread and this thread

And possibly the most impressive: planters in this thread.

There are plenty others - use the search tool.
I don't find your name in this list.
Do you think that you can provide to us any information about the models of pbs cubes they have used in their projects?

Last edited by laserluke; 06-13-2012 at 08:11 AM.
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Old 06-13-2012, 01:40 PM #27
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Default Re: Beam combiner tests (new battery-driver holder)

No answer?
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Old 06-13-2012, 03:55 PM #28
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Default Re: Beam combiner tests (new battery-driver holder)

I think you're just mad you spent $200 on a cube when you only had to spend $50.
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Old 06-13-2012, 08:34 PM #29
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Default Re: Beam combiner tests (new battery-driver holder)

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I think you're just mad you spent $200 on a cube when you only had to spend $50.
Cyparagon,
there is a person that has started this and other threads to honestly share his work and the relative informations with the community.
There is also a very poor and maladjusted person that is capable to do nothing else that spamming by using a rude language. This person has already been censored.
I think you should stop to post all of this garbage, take the remaining of your dignity and go away.

P.S. to the moderator - if you think that the informations that i have placed here about my tests could be useful for anyone, then please make this thread more clean, useful and decent by deleting all the garbage from cyparagon and, naturally, all my answers to this person.
I'm ready to stop sharing any further information about my work. At this point i think that this thread has become very unuseful and pathetic just like cyparagon has wanted since from his first post
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