I know very little about 473nm DPSS lasers due to the fact there is not much info avalable on the internet. According to Wikipedia, and the details seem fuzzy to me. A blue DPSS uses the same components as a green module except for the pump diode..... At least that's how I read it. The KTP recieves 946nm or so to produce a 473nm output. So, do they use a 940nm or so pump diode directly to the KTP or do they use a variation of YAG or YVO4 to create this wavelength to pump the KTP? Anyway, What's the expensive part in this package? I'd imagine getting a stablized LD to pump out 946nm at a few watts isn't that hard.
Thanks
Adam