where to buy a 3 watt red laser,and how much is the appropriate price

[abrahamvct]

where to buy a 3 watt red laser,and how much is the appropriate price?

[sbk]

Many manufacturers out there (RGBLaserSystem, Kvant, Arctos, maybe Brightlight Equipment, and others).

For an idea of the price, here is a listing on eBay : http://www.ebay.com/itm/RLM-3000L-63...item336d257edf

[kitatit]

Hi abrahamvct.

We need a bit more information on what you are trying to do.

There are a lot of ways to get 3 watts of red. Some are very cheap, some are expensive.

Some have very poor beam characteristics and some are excellent.


638nm red is the wavelength to go for. This can be done with around 16 single mode diodes combined. This will give the best beam specs with the brightest colour.

The skill time and quality design and components to achieve
This are considerable so it can be pricey.

You can buy these from
rgblasersystem
Kvant

Also andy con and edison build red laser modules.

2nd option is the build a module using Mitsubishi P73 high powered 638nm diodes which are cheap but need beam correction.

Edison doesn't use this method but andy or serveral ther people could make it for you if you don't want to do it yourself.


Sorry I haven't listed any prices as its a while since I bought a red module.

Don't get sucked into only looking at power. 2 watt of 638nm with a nice small and low divergence beam will appear brighter and safer than lasers that are 3-5 watts are in the 650nm-671nm range.

Also if you fill in your location on your profile we can point you towards the best contacts in your part of the world.

Good luck
Kit

[The_Doctor]

Very good post for a grasshopper.

I think I need to get me some single mode 638 nm diodes. I used to try several red diodes, but haven't built anything for at least 6 years. Where's the best source of them in PL land? (I'm in England, and don't do PayPal anymore, which might limit the field, though if it's a stable and registered business that will take payment from a Visa debit card I could maybe do that). And if there is discount for ten or some other number I'll give that serious thought.

[edison]

638nm red is the wavelength to go for. This can be done with around 16 single mode diodes combined. This will give the best beam specs with the brightest colour.

exactly. 635-640 is roughly 2.5x as bright as 650. Second, single mode will get you the best beamspecs but it depends on your budget.

2nd option is the build a module using Mitsubishi P73 high powered 638nm diodes which are cheap but need beam correction.

Edison doesn't use this method but andy or serveral ther people could make it for you if you don't want to do it yourself.

Yes and no.Yes P73 and P71 need correction optics. I do build multimode modules but only custom build. Beamspecs of my multimode modules are below, last 2 pictures show color difference between 638nm and 650nm

[andy_con]

I only do 2w 638 multi modal

[abrahamvct]

well, thank u very much for ur advice, i know better the difference between 638 and 650 after read it, thanks again. The 2nd and 3rd pics show a light spot not so good, though the beam effect is excellent. i m not a grasshopper, well, sort of, for i dont know if i will buy one. i want to buy a good device buy not too expensive for a light show, i have a green one and i could build a blue, the only thing to do to accomplish the task is to get a good specific of red. 4.5mm^2 with 1.5 mrad divergence is enough for me . and i dont want to buy it at a price, so the price tag should not be too high. and another thing, how much is the output power i need? i m not quite sure, it depends on the selling price . 2 watt is ok, 3 watt is better. and one more question, does the combination of 16 diode could reach a high power of 3 watt? i have learnt something in this field before, i think it is hard to reach 3.

[The_Doctor]

..i m not a grasshopper, well, sort of

No, no... him. Kitatit, self confessed grasshopper. And not a bad state to be.

One thing maybe not mentioned in this thread is the 5W (650nm?) C-mount multimode diodes. With that much light from one diode things may get easier (and dangerous), and you can likely justify throwing more money and effort into the correction optics (prisms being the best part, probably). I have no idea what those diodes will cost, but I very much want to...

[abrahamvct]

No, no... him. Kitatit, self confessed grasshopper. And not a bad state to be.

One thing maybe not mentioned in this thread is the 5W (650nm?) C-mount multimode diodes. With that much light from one diode things may get easier (and dangerous), and you can likely justify throwing more money and effort into the correction optics (prisms being the best part, probably). I have no idea what those diodes will cost, but I very much want to...

5W 650，is it built with many c-mount multimode diode or just one? if it is one, then should i consider that it is much more stable than any others? and which diode manufacture has this kind of diode? i like good and cheap laser, no matter buy it or make it myself , of course, in a not so complicated way.

[sbk]

i like good and cheap laser

Please urge to read the laser rule of thumb bible. You will find out that "cheap" and "good" words are never used in the same sentence...