Can it be done? I mean something has to read the disc.
CD players do use a laser diode -- but usually not in visible wavelengths, so it isn't much fun to play with. DVD players use a laser which is much more entertaining (and more powerful); see many posts here on Instructables for details.
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but can it still be done
Sure. Remove the laser diode, mount it in a heat sink, hook it to an appropriate power supply. It won't do anything very interesting except emit a bright beam of infrared light, but it will be a laser.
do i need a heat sink
Most likely, yes, you do.
what electronics could you acquire one
darn because I have a bunch of cd players but no breakable dvd players
That's hard, but if you know how a CD player laser works, you can make it.
But i don't