combing 405nm

[laserwinkel]

ive searched for this but have not found a answer for it.
but is there a cheap way to combine 405nm beams?
i want to get atleast 500mW of 405nm. i have a few diodes that get to 150-170mW so is there anything to combine 4 of these?

[VJ AIWAZ]

http://www.photonlexicon.com/forums/...ead.php?t=9714

[Laserman532]

http://www.photonlexicon.com/forums/...ead.php?t=9714

he said cheap way...its all relative. The cheap way is do it yourself with a piece of wood and a dremell tool.

But to answer your question laserwinkel. My system is an excellent starting point should you have a few extra bucks hanging around. It will make your project simple and fast.

[laserwinkel]

haha indeed if i use this with 4 diodes of 6x Blu ray i can own a 1 watt 405nm for around $500 that sounds like a good deal. i'll think about it
thanks for help!

[laserwinkel]

just was thinking of this:

is this setup possible with glass lenses?

[Stoney3K]

just was thinking of this:

is this setup possible with glass lenses?

The classic and tried-and-tested way is to use PBS cubes to combine the beams two-by-two, and then knife-edge them into one beam. The obvious downside to that is that you lose a lot of beam characteristics, and you get the classic 'fat red' syndrome.

Telescoping a bunch of beams together would work in theory, but keep in mind that you will also keep the gaps between the beams. If you manage to get one wide high-power beam, using a telescope might be a better solution to 'pinch' it into a smaller diameter. Look at Andy's Project Red for a good example.

[mixedgas]

just was thinking of this:

is this setup possible with glass lenses?

NO, each laser will come to its own focal point offset by a non linear distance from how far it is off center.

Steve

[andy_con]

just was thinking of this:

is this setup possible with glass lenses?

yes in theory you could combine 4 beams into one using the arctos way. but 4 in a line isnt the best way as the final beam will be a small line.

the best way would be -

II
II

this way you will get a more square/round beam out.

im not mega up on lens, but i dont know of a lens for 405 that gives really good beam specs, so you could use a quad setup like lasermans but the final beam will probably be a bit big. laserman may have a source of very good lens which over comes this problem though, im not sure??

using the right lens and lasermans setup for reds is fine as you can get very small beams out.

[laserist]

NO, each laser will come to its own focal point offset by a non linear distance from how far it is off center.

Steve

No, if the beams are parallel to each other they will come to one focus. It's no different than a larger beam masked to produce 4 beams into the lens. The problem is that the beams will diverge from the focus and their separation when recollimated is a function of the relative magnification of the 2 lenses.

Brian

[Stoney3K]

BTW, slightly side-stepping the topic, but:

Is it possible to get a quad kit, and knife-edge two 405nm with two 660nm beams together, saving up on a dichro?