Multi mode vs. Single mode

[planters]

i can do 0.6mrd full angle with a 3x2mm beam for a quad. You can,t do that with multimode. Multimode is more like 4-5mm at aperture and 1 mrd.

I don't want to get into that old mine vs yours approach, but with care my multimode quad is substantially better than 1mrad at that aperture. However the care needed is high and I suspect that with the components required will be less robust against vibration than a stacked single mode setup. Now, I do not know how much power you can get from one of the single mode diodes (200mw?), but a 3W quad is practical with four G71s. But, here I will cross paths and recommend the single mode to someone just getting into the build area. There will be less alignment to work out and the beams are nice right from the start.

[edison]

I have seen your setup and yes your right it can be even better but i ment the average person. I have seen your youtube video,s and you are working with very high quality stuff and equipment that probably you only have. Also your skills are 5 times better then the average hobbyist but maybe your aren,t aware of that. In my opinion you are doing things on a professional level at least when it comes to materials, skills and equipment. I sold quite a few quad kits and i got half of them returned because problems, with stacking , allignment , glueing mirrors soldering and so on.And that was just single modes! I fixed most of them or swapped them eventually for a ready build one. The multimode diodes are great for a hobbyist and with very good skills and mounts from dave etc you could build a good setup. But if you look on PL only a Handfull of people really build a quad with them. And that is enough proof for meTonyazec is one of them and i must say he did a damn fine job!!!!
Stacking is for hardcore guys like you , Tonyazec, Kitakit, Andy-con, SBK, andythemechanic,planters, solarfire and many others that been here for a while. To avoid disappointment i would advice to start with a simple setup like a dual single or multimode. once you get the hang of it and you like the build go for a quad. Most people are in for doing shows and not for the build. Its great to see lasershows but i get realy excited from seeing a 3 watt white beam that is 0.5mrd

[RGB LASER VERKOOP]

made this picture today :-) what laser would you pick ?

2x single mode projectors versus 1x multi mode


and the client go for 2x the 3300mW luminous with multi mode...
laser greets joost

[planters]

edison,

I am touched as well as bested. Now what do I say? I would still advise a newcomer to start with a single mode with its simpler optical layout and then after a successful build if the power bug bites then multimode or modules will be better understood and appreciated.

[astatic]

As a starting member i also start building my own modules/projector and i have to agree with Planters, the easiest way to learn how to stack and use beam correction optics will be with the single mode diodes.
A quad G71's is a pain in the a.., it's allot easier to do a quad Opnext hl63133dg or similar diode like a Mitsubishi single mode.
I had to read several topics over and over again to understand why they choose to do it like that, after that it took me some time to get the same results but once you get it you can get nice results.

@RGB Laser verkoop
There could only be one option why this customer choose for the luminous: money vs power.
This customer wasn't thinking about beam quality and visibility after 10 meters.