Laser problem in Laser Harp project

i am new to Arduino…me and my friend are trying to make Laser Harp project…

we have extracted the Laser diode(>200mW) from a DVD writer,but the major problem with the Laser is that it heats up rapidly and we need to cool it down by shutting the Laser…

on the internet i searched for various solutions but couldn’t figure out anything…

i searched that a heat sink would help us in this regard but couldn’t figure out how to connect my Laser Diode with the heat sink…

any help in this regard will be appreciated,as it will lead us to the completion of our project…

thanks in advance…