That laptop has a double layer dvd optical drive which will read or write to discs employing two recordable dye layers doubling the capacity of a normal dvd disc of 4.7GB.
You can however purchase external Bluray optical drives to connect via usb 2 or 3.
can pick one up fairly cheap, the link i gave from newegg has a price on it to give you an idea. There are plenty of others ranging cheaper and dearer.
Your nearest store should have near enough prices if you're not keen ordering online