Recent content by Sowee7

Do these new 577nm modules use a SFD based process? Do they use a similar Yb doped crystal to the optlaser and lasence modules?

Nd:YVO4 is not doing the summing, the summing is done in a different nonlinear crystal most likely KTP or LBO

I've seen some that lase at 554nm and some that lase up to 563nm, also these laser's wavelengths can change due to temperature

These are SFD (self frequency doubling) based lasers, they do use a Nd doped crystal and are pumped with an 808nm laser

This laser is not one of those "591nm" lasers that are mislabelled 593.5nm lasers, this is a true 589nm laser, these handhelds use CNI modules and have an IR filter within the module. 561nm is not produced from the SFG of 1064nm and 1319nm (589nm) or 1064nm and 1342nm (593.5nm)

These use a 300-500mw diode inside, the same diodes as those in normal cheap 532nm lasers

These 593.5nm lasers use MCAs, the frequency summing crystal and the Nd:YVO4 have been glued together and the mirrors have been coated onto the ends, this removes the need for careful alignment of the seperate optics, they also use very low powered pumps, only about 300mw, they are constructed...

Ah this makes more sense, 591nm is an unusual wavelength and it makes a lot more sense for it to be 593.5nm. how did you make this so cheap? Does this use some sort of MCA to lower the cost of does it use the conventional method of separate crystals and optics?

This laser doesn't seem to use the same modules as the older CNI GLP pens

Lasence 561nm, 555nm and 545nm modules don't really degrade unlike the older 57Xnm ones so they might have solved the hygroscopic issue or they could be using a different crystal. O have not heard of any company that uses SFD crystals to make 591 so it is quite possible that this is some new...

Or these could just become unavailable like those 574nm lasence/optlaser modules

I wonder what crystal they are using for 591nm, I just bought one, does anyone know who produces the modules in these?

PM sent

Lasence have produced 1W 545nm modules, laserglow currently has a 100mw 671nm DPSS handheld laser for sale https://www.laserglow.com/product/orion-pro-red-portable-laser

Do you think it could have LED'd?