A BluRay DVD burner will have a 405nm laser diode in it, probably another IR or red laser diode too, I'm not really up on this subject enough to direct you more than I already have, but others here are and might chime in. Might see if you can find a stack of old CD or DVD burners cheap somewhere, maybe a computer repair shop, sometimes the diode blows, sometimes the mechanism has a problem, but you can probably find some good used ones which are slow to todays standards cheap.
Read up on safety first before messing with these laser diodes, get some laser rated safety goggles if you do end up doing this.