>(is this possible?) re-tuning the beam's frequency.
No. DVD burners simply use a 630nm or 650nm red laser diode. It can not be re-tuned more than a few nm, by regulating the temperature of the diode.
You could replace the diode, but that is more effort than it's worth, and there's not much else to replace it with. If you wanted more power you might use a different diode, but the diodes are almost always buried really far in there and you would have to replace the electronics as well.
Comments
>(is this possible?) re-tuning the beam's frequency.
No. DVD burners simply use a 630nm or 650nm red laser diode. It can not be re-tuned more than a few nm, by regulating the temperature of the diode.
You could replace the diode, but that is more effort than it's worth, and there's not much else to replace it with. If you wanted more power you might use a different diode, but the diodes are almost always buried really far in there and you would have to replace the electronics as well.