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i am looking for a powerful red laser at or over 400mw. i need it for burning
Nice red burner ya got there...
He asked for a RED laser. go to o-like.com or possibly dealextreme depending on where you live. you can save money by getting a low mw red like a 200mw. thats what i have. it outputs 176mw and pops balloons and lights matches.
Another way to make a over 400 mW red laser is with a red C-mount diode.
You could easily make a multi-watt red C-mount laser, it's just not easy because C-mount modules are hard to make.
There is also a 671 nm red DPSS system, however I am not familiar with commercial availability, I think CNI had modules for those, and I think WickedLasers uses them in their 400mW+ red handhelds.The 200mW red dilda is the best red burner for the money. If you absolutely need over 400mW of red, there are 3 ways to go. As mentioned, combine the output of two LOC or LCC red diodes with a PBS cube, this being the cheapest way of the three. The next way is a 1W red 9mm can diode in an o-like 9mm housing with lens. Try to get a red 9mm diode with fac if at all possible. FAC (fast axis collimation) is a lens built onto the diode at the factory. It corrects the terrible fast axis divergence that makes these diodes so hard to use. Without fac, the burner will not be as good.
The third way is to use a c-mount red diode. You must machine a module yourself for it, none are available commercially. Again, get a diode with fac if at all possible.
If you want an ajustable focus laser that can produce a beam over distance, use the first option with two diodes and a cube. This will be best beam quality of the three and produce a beam or burning spot as required.
The 9mm and c-mount are more powerful, but it can be difficult to find these with fac. These diodes, especially the c-mount, can be very expensive to buy. At one point, o-like had a 1W red c-mount for $800 USD ! These diodes turn up on ebay regularly as well, but are not dirt cheap. These will typically only be focusable to a burning point a few inches from the laser (using a normal glass lens) unless you want the size and high cost of full beam correction optics including cylinder lenses and anamorphic prisms.
The next way is a 1W red 9mm can diode in an o-like 9mm housing with lens.