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gramps2 writes:
It was my understanding that Cree had already developed an operating blue laser and that a Japanese Company had also developed one.


I do not know whether CREE has even gotten to the prototype fabrication stage, but a few other companies have done it already. The CREE strategy is not to be the first ever to create a blue laser. CREE hopes to be the first company to create a solid-state blue laser based on silicon carbide, and is also hoping by the by that SiC is the best substrate for said laser.
There is NOT, I repeat, NOT, some race going on to create the first blue laser as though it were a moon landing. (Many people can't get this out of their heads)


One thing I have wondered about though is that if a red, Green and blue laser could be combined into a white laser.


By definition, a laser can only have one wavelength.
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