green ld

[Rhith]

Because IR diodes have been out for a long time so they have been able to create small and powerful diodes over the years. And since they have had the diodes for a long time they have been manipulating them for a long time being able to find ways to make colored coherent light out of 808nm.

 

[pseudonomen137]

Why can the DPPS be made so powerful.... doesn’t it use an inferred diode?

Huh? Powerful as opposed to what? Single mode diodes are limited to a few hundred mWs right now. However a DPSS unit is normally pumped by a multi-mode IR diode which can be in the watt range. And when you really need power, a DPSS laser uses multiple IR diodes to pump a single crystal.

 

[f22warzone]

uh hu so what is a multi mode ir diode?

and also isnt their a 2.5W diode in the RPL lasers ?

 

[pseudonomen137]

uh hu so what is a multi mode ir diode?

and also isnt their a 2.5W diode in the RPL lasers ?

Well thats the problem. There are 660nm red diodes in excess of 1W, but they are multi-mode diodes. For us, that means horrible beam specs. A good single mode diode will get close to perfect beam specs, whereas a collimated multi-mode will often have ~20x worse than perfect. That means 3-5mm at aperture and 3-5mRad divergence - horrible specs.

The 2.5W diode in the RPL is just a pump for the crystal, and is a multi-mode. Multi-mode IRs reach 5W+ levels, but single-modes are still limited to a couple hundred mWs.

So unfortunately if you want a high power laser projector with reasonable beam specs, you either need to go DPSS (even on the red), or go gas.

 

[Krutz]

So unfortunately if you want a high power laser projector with reasonable beam specs, you either need to go DPSS (even on the red), or go gas.

thanks for stating it that clear! i wondered why there are red dpss any more, and thought it would be for special cases where a single known wavelength is needed, research and stuff.
will have to read about the differences on single- and multimode again!

manuel

 

[philguy]

So unfortunately if you want a high power laser projector with reasonable beam specs, you either need to go DPSS (even on the red), or go gas.

New slogan: "Got Gas?"

As in gas laser, of course! Or what were you thinking?!?

OK, sorry about this little juvenile outbreak, now ontopic:
I can basically push a YAG to any power I wish for right? So firing that into a KTP would give me any green power of my choice? That is, ignoring heat issues.

Also, won't an Argon give me several wavelengths so that with appropriate filtering, I can get any colour I wish for (by mixing colours) out of an Argon? Or do I need to modulate/manipulate the laser in order to "tune" it to the desired frequency/ies?

So if I say "I want that frequency, my highest chances were to try and find an appropriate dye? Which will give me crappy power ratings?

 

[JLSE]

I just ordered 3 of the SKU: 10094 's, what type of mods are good for these units? :-?